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Apple Watch Series 3 42mm Review | 126 Data compared

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  • Avg. price: ~£230
  • Screen size: 1.65 inch
  • Battery life: 0.75 day/s
  • Display type: OLED

Apple Watch Series 3 42mm review. Compare 126 technical specifications and user reviews to see how it ranks among smartwatches and if it is worth buying.

7.0

Overall score

What it is: An overall evaluation of the smartwatch's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best Smartwatches on the market.

Score components:

90.0%

6.7

Technical Score

10.0%

9.6

User score

Very good
6.7

Technical Score

What it is: An assessment of the smartwatch's technical performance, covering eight key areas: performance & hardware, software, camera, connectivity, display, battery, audio, and design.

When it matters: When you want to compare Smartwatches based on technical performance and available features.

Score components:

24.0%

5.1

Health

21.0%

9.1

Fitness

16.0%

3.4

Battery

14.0%

8.5

Smart features

12.0%

8.2

Connectivity

9.0%

6.9

Display & Design

4.0%

6.0

Hardware

Good
9.6

User score

What it is: A rating that combines user reviews and the total number of reviews received by the smartwatch

When it matters: When you want to know how a smartwatch handles daily tasks and how reliable it remains over time according to user feedback.

Score components:

70.0%

9.4

User reviews

30.0%

10

Popularity

User score:
amazon
4.7
(11740)
amazon
4.7
(2878)
amazon
4.7
(858)

(Reviews last updated: Apr 2026)

Exceptional
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    Best prices

    Best rankings

    ?

    Available: ranking among products currently available (including other versions of this product).
    All: ranking among all products in the database.

    Technical Specifications of smartwatch Apple Watch Series 3 42mm

    Technical Score

    What it is: An assessment of the smartwatch's technical performance, covering eight key areas: performance & hardware, software, camera, connectivity, display, battery, audio, and design.

    When it matters: When you want to compare Smartwatches based on technical performance and available features.

    Score components:

    24.0%

    5.1

    Health

    21.0%

    9.1

    Fitness

    16.0%

    3.4

    Battery

    14.0%

    8.5

    Smart features

    12.0%

    8.2

    Connectivity

    9.0%

    6.9

    Display & Design

    4.0%

    6.0

    Hardware

    6.7
    Apple Watch Series 3 42mm has a technical score of 6.73 points, which is higher than 63.6% of smartwatches.
    User score

    What it is: A rating that combines user reviews and the total number of reviews received by the smartwatch

    When it matters: When you want to know how a smartwatch handles daily tasks and how reliable it remains over time according to user feedback.

    Score components:

    70.0%

    9.4

    User reviews

    30.0%

    10

    Popularity

    User score:
    amazon
    4.7
    (11740)
    amazon
    4.7
    (2878)
    amazon
    4.7
    (858)

    (Reviews last updated: Apr 2026)

    9.6
    Apple Watch Series 3 42mm has a user score of 9.58 points, which is higher than 99.7% of smartwatches.
    Popularity
    What it is: An indicator based on the number of reviews received by the smartwatch.
    When it matters: When you prefer to purchase a product chosen and reviewed by many other consumers.
    10
    Apple Watch Series 3 42mm has a popularity of 10 points, which is higher than 74.7% of smartphones.
    Ratio quality/price

    What it is: An indicator that combines the smartwatch's overall rating with its cost.

    When it matters: When you are looking for a smartwatch with a good balance between quality and price.

    Score components:

    60.0%

    7.0

    Overall score

    40.0%

    9.3

    Price

    7.7
    Apple Watch Series 3 42mm has a quality-to-price ratio of 7.7 points, which is higher than 64.4% of smartphones.
    Brand name
    What it is: The company that designs, sells, and supports the watch.
    When it matters: When brand ecosystem, style, or support matters to you.

    Importance: MEDIUM

    Apple
    Heart rate monitor
    What it is: A built-in sensor that measures your pulse directly from the wrist.
    When it matters: When you want health data from your wrist during the day or night.

    Importance: HIGH

    yes
    Apple Watch Series 3 42mm includes a heart rate monitor. 90.4% of smartwatches include a heart rate monitor.
    Blood oxygen monitoring
    What it is: A wrist-based feature that estimates blood oxygen saturation over time.
    When it matters: When you want health data from your wrist during the day or night.

    Importance: HIGH

    no
    Apple Watch Series 3 42mm does not support blood oxygen monitoring. 64.4% of smartwatches support blood oxygen monitoring.
    ECG
    What it is: The ability to record a single-lead electrocardiogram from the wrist.
    When it matters: When you want health data from your wrist during the day or night.

    Importance: HIGH

    no
    Apple Watch Series 3 42mm does not support ECG. 15.1% of smartwatches support ECG.
    Availability may vary by region or model version. May require a compatible phone, software version, or app setup.
    Irregular heart rate warnings
    What it is: Notifications that flag heart-rate patterns which appear unusually irregular.
    When it matters: When you want health data from your wrist during the day or night.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports irregular heart rate warnings. 43.7% of smartwatches support irregular heart rate warnings.
    Show more
    Accelerometer
    What it is: A motion sensor that measures acceleration, steps, gestures, and general movement.
    When it matters: When you track workouts and want better training data.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm includes an accelerometer. 99.1% of smartwatches include an accelerometer.
    Barometer
    What it is: A pressure sensor used for altitude changes, elevation estimates, and weather-related context.
    When it matters: When you run, ride, hike, or navigate without relying on your phone.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm includes a barometer. 45.6% of smartwatches include a barometer.
    Gyroscope
    What it is: A motion sensor that measures rotation and helps interpret wrist movement more accurately.
    When it matters: When you track workouts and want better training data.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm includes a gyroscope. 64.6% of smartwatches include a gyroscope.
    Cadence sensor
    What it is: A sensor input used to measure step or pedal rhythm during training.
    When it matters: When you track workouts and want better training data.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm includes a cadence sensor. 20.1% of smartwatches include a cadence sensor.
    Cadence may require external sensor/app pairing on some models.
    Distance tracking
    What it is: The ability to measure how far you move during walks, runs, rides, or other activities.
    When it matters: When you track workouts and want better training data.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports distance tracking. 95.7% of smartwatches support distance tracking.
    Show more
    Battery life
    What it is: The typical endurance the watch can deliver on a full charge under the stated usage pattern.
    When it matters: When you do not want to charge the watch too often.

    Importance: HIGH

    Good value: >=7 days

    0.75 day/s
    Apple Watch Series 3 42mm offers a battery life of 0.75 day/s which is shorter than that of 98% of smartwatches and equal to that of 2% of smartwatches.
    Converted from the reported 18-hour battery life.
    Battery life in training mode
    What it is: The expected endurance while workout tracking and related training functions are active.
    When it matters: When you do not want to charge the watch too often.

    Importance: HIGH

    Good value: >=36.8 h

    5 h
    Apple Watch Series 3 42mm lasts 5 h in training mode which is shorter than 90.7% of smartwatches and equal to that of 3.6% of smartwatches.
    Battery life with GPS on
    What it is: The expected runtime when satellite tracking stays active throughout use.
    When it matters: When you do not want to charge the watch too often.

    Importance: HIGH

    Good value: >=35 h

    5 h
    Apple Watch Series 3 42mm lasts 5 h with GPS on which is shorter than 91% of smartwatches and equal to that of 2.8% of smartwatches.
    Battery power
    What it is: The battery capacity, usually measured in milliampere-hours (mAh).
    When it matters: When you do not want to charge the watch too often.

    Importance: HIGH

    Good value: >=397 mAh

    342 mAh
    Apple Watch Series 3 42mm has a battery capacity of 342 mAh which is larger than the batteries in 63.6% of smartwatches of smartwatches.
    Battery capacity varies by case size/model variant.
    Charge time
    What it is: The time needed to recharge the battery from empty to full or to a stated percentage.
    When it matters: When you want to top up the battery quickly.

    Importance: HIGH

    Good value: <=102 min

    120 min
    Apple Watch Series 3 42mm charges in 120 min which is faster than 12.9% of smartwatches and equal to the charge time of 43.4% of smartwatches.
    Approximate value from reported charging range: 120 minutes.
    Show more
    Operating system
    What it is: The software platform that runs the watch interface, apps, and core functions.
    When it matters: When you care about apps, features, and long-term support.

    Importance: HIGH

    watchOS
    Apple Watch Series 3 42mm runs watchOS which is more advanced than the operating system in 95.7% of smartwatches and the same as that in 4.3% of smartwatches.
    OS detail: watchOS (4).
    Software update frequency
    What it is: Shows how actively the watch is still updated: regular means ongoing updates throughout active support, occasional means updates every few months or only from time to time, and ended means active software support has mostly stopped.
    When it matters: When you care how actively the watch is still supported with fixes, patches, and new features.

    Importance: MEDIUM

    ended
    Apple Watch Series 3 42mm has ended software update support which is equal to that of 57.5% of smartwatches.
    Software support appears ended or discontinued.
    Third-party app support
    What it is: Support for installing or using apps from developers beyond the watch maker.
    When it matters: When you care about apps, features, and long-term support.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports third-party apps. 47.6% of smartwatches support third-party apps.
    Notifications
    What it is: Mirroring of calls, messages, apps, or other alerts on the watch.
    When it matters: When you want to check alerts without taking out your phone.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports notifications. 99.9% of smartwatches support notifications.
    Voice assistant support
    What it is: Support for a voice assistant that can answer queries or trigger actions from the wrist.
    When it matters: When you want to control the watch or reply without typing.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports voice assistants. 68% of smartwatches support voice assistants.
    Show more
    Cellular module
    What it is: Built-in mobile connectivity that can keep the watch online away from the phone.
    When it matters: When you want calls, messages, or data without your phone nearby.

    Importance: HIGH

    yes
    Apple Watch Series 3 42mm includes a cellular module. 17.2% of smartwatches include a cellular module.
    Cellular support may depend on LTE/GPS+Cellular variant selection.
    SIM cards
    What it is: The number or type of SIM options the watch accepts for cellular service.
    When it matters: When you want calls, messages, or data without your phone nearby.

    Importance: LOW

    Good value: eSIM support

    1
    GPS
    What it is: Built-in satellite positioning that lets the watch record location during outdoor activity.
    When it matters: When you run, ride, hike, or navigate without relying on your phone.

    Importance: HIGH

    yes
    Apple Watch Series 3 42mm supports GPS. 56.1% of smartwatches support GPS.
    Galileo support
    What it is: Support for Galileo satellites alongside other positioning systems.
    When it matters: When you run, ride, hike, or navigate without relying on your phone.

    Importance: MEDIUM

    yes
    Apple Watch Series 3 42mm supports Galileo navigation. 38.7% of smartwatches support Galileo navigation.
    Compass
    What it is: A directional sensor that helps the watch determine heading and orientation.
    When it matters: When you run, ride, hike, or navigate without relying on your phone.

    Importance: MEDIUM

    no
    Apple Watch Series 3 42mm does not include a compass. 49.3% of smartwatches include a compass.
    Show more
    Screen size
    What it is: The diagonal measurement of the visible display area, usually expressed in inches.
    When it matters: When you want the screen to be easy to read at a glance.

    Importance: HIGH

    Good value: >=1.5 inch

    1.65 inch
    Apple Watch Series 3 42mm has a screen size of 1.65 inch which is larger than the screens of 78.3% of smartwatches and equal to those of 1.5% of smartwatches.
    Some sources mention multiple/uncertain size variants.
    Display type
    What it is: The screen technology used by the watch, such as AMOLED, OLED, or memory-in-pixel LCD.
    When it matters: When you want the screen to be easy to read at a glance.

    Importance: HIGH

    OLED
    Apple Watch Series 3 42mm uses a OLED display type which is less advanced than that of 51.4% of smartwatches and the same as that of 9.7% of smartwatches.
    Retina branding.
    Resolution
    What it is: The total number of pixels available on the watch display.
    When it matters: When you want the screen to be easy to read at a glance.

    Importance: MEDIUM

    Good value: >=416 x 416

    312 x 390
    Apple Watch Series 3 42mm has a display resolution of 312 x 390 which is lower than that of 59.8% of smartwatches and equal to that of 0.2% of smartwatches.
    Pixel density
    What it is: The number of pixels packed into each inch of the display.
    When it matters: When you want the screen to be easy to read at a glance.

    Importance: MEDIUM

    Good value: >=326 ppi

    303 ppi
    Apple Watch Series 3 42mm has a pixel density of 303 ppi which is lower than that of 62.3% of smartwatches of smartwatches.
    Display brightness
    What it is: The peak brightness the display can reach, usually expressed in nits.
    When it matters: When you want the screen to stay readable outdoors and in strong sunlight.

    Importance: HIGH

    Good value: >=1000 nits

    1,000 nits
    Apple Watch Series 3 42mm reaches 1000 nits nits of display brightness, which is higher than that of 59.5% of smartwatches and equal to that of 26.5% of smartwatches.
    Show more
    CPU speed
    What it is: The clock speed of the watch processor, usually expressed in GHz or MHz.
    When it matters: When you want apps and menus to feel smooth.

    Importance: MEDIUM

    Good value: Modern standard

    ?
    Processor model
    What it is: The processor model is the chipset or SoC that powers the watch's performance, connectivity, and efficiency.
    When it matters: When you care about app responsiveness, platform generation, and long-term feature support.

    Importance: LOW

    Good value: modern smartwatch chipset

    Apple S3
    Apple Watch Series 3 42mm uses the Apple S3 processor model.
    RAM
    What it is: The amount of working memory available for apps, watch faces, and background tasks.
    When it matters: When you want apps and menus to feel smooth.

    Importance: MEDIUM

    Good value: >=1 GB

    0.75 GB
    Apple Watch Series 3 42mm has 0.75 GB of RAM which is smaller than the RAM in 69.2% of smartwatches and equal to that of 3% of smartwatches.
    768 MB RAM
    Internal storage
    What it is: Built-in storage for apps, music, watch faces, and other local data.
    When it matters: When you want more room for apps, music, or offline data.

    Importance: MEDIUM

    Good value: >=8 GB

    8 GB
    Apple Watch Series 3 42mm uses 8 GB for internal storage which is larger than that of 67.6% of smartwatches and equal to that of 12.1% of smartwatches.
    External memory slot
    What it is: A slot for expandable storage such as a memory card, if the watch provides one.
    When it matters: When you want more room for apps, music, or offline data.

    Importance: LOW

    no
    Apple Watch Series 3 42mm does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
    Show more

    Apple Watch Series 3 42mm vs the average smartwatch

    • Has cellular module
      Apple Watch Series 342mm includes a cellular module, the average smartwatch does not. 17.2% of smartwatches include a cellular module.
      Cellular support may depend on LTE/GPS+Cellular variant selection.
      What it is: Built-in mobile connectivity that can keep the watch online away from the phone.
      When it matters: When you want calls, messages, or data without your phone nearby.

      Importance: HIGH

      Apple Watch Series 342mm includes a cellular module, the average smartwatch does not. 17.2% of smartwatches include a cellular module.
    • More advanced operating system
      Apple Watch Series 342mm runs a more advanced operating system than the average smartwatch (watchOS vs Proprietary OS).
      OS detail: watchOS (4).
      What it is: The software platform that runs the watch interface, apps, and core functions.
      When it matters: When you care about apps, features, and long-term support.

      Importance: HIGH

      Apple Watch Series 342mm runs a more advanced operating system than the average smartwatch (watchOS vs Proprietary OS).watchOS vs Proprietary OS
    • Includes wireless charging
      Apple Watch Series 342mm supports wireless charging, the average smartwatch does not. 24.9% of smartwatches support wireless charging.
      What it is: Support for recharging the watch through a charging pad, puck, or other cable-free method.
      When it matters: When you want to top up the battery quickly.

      Importance: MEDIUM

      Apple Watch Series 342mm supports wireless charging, the average smartwatch does not. 24.9% of smartwatches support wireless charging.
    • Has NFC
      Apple Watch Series 342mm supports NFC, the average smartwatch does not. 42.5% of smartwatches support NFC.
      What it is: Near-field communication hardware used for payments, pairing, or quick tap-based actions.
      When it matters: When you want to pay quickly or pair devices with a tap.

      Importance: HIGH

      Apple Watch Series 342mm supports NFC, the average smartwatch does not. 42.5% of smartwatches support NFC.
    • Has HRV tracking
      Apple Watch Series 342mm supports HRV tracking, the average smartwatch does not. 38.2% of smartwatches support HRV tracking.
      What it is: Measurement of heart-rate variability, the change in timing between heartbeats.
      When it matters: When you want health data from your wrist during the day or night.

      Importance: MEDIUM

      Apple Watch Series 342mm supports HRV tracking, the average smartwatch does not. 38.2% of smartwatches support HRV tracking.
    • Supports Emergency SOS
      Apple Watch Series 342mm includes Emergency SOS, the average smartwatch does not. 42.4% of smartwatches include Emergency SOS.
      What it is: An emergency feature that can contact help or alert trusted people from the watch.
      When it matters: When you want extra help in an emergency.

      Importance: HIGH

      Apple Watch Series 342mm includes Emergency SOS, the average smartwatch does not. 42.4% of smartwatches include Emergency SOS.
    • Supports VO2 max
      Apple Watch Series 342mm measures VO2 max, the average smartwatch does not. 49.3% of smartwatches measure VO2 max.
      What it is: Estimated VO2 max, a fitness metric linked to aerobic capacity and endurance.
      When it matters: When you track workouts and want better training data.

      Importance: MEDIUM

      Apple Watch Series 342mm measures VO2 max, the average smartwatch does not. 49.3% of smartwatches measure VO2 max.
    • Includes maps
      Apple Watch Series 342mm supports maps, the average smartwatch does not. 32.2% of smartwatches support maps.
      What it is: The ability to view maps, navigation guidance, or route layouts on the watch.
      When it matters: When you run, ride, hike, or navigate without relying on your phone.

      Importance: MEDIUM

      Apple Watch Series 342mm supports maps, the average smartwatch does not. 32.2% of smartwatches support maps.
    • Has HRV tracking
      Apple Watch Series 342mm supports HRV tracking, the average smartwatch does not. 38.2% of smartwatches support HRV tracking.
    • Supports VO2 max
      Apple Watch Series 342mm measures VO2 max, the average smartwatch does not. 49.3% of smartwatches measure VO2 max.
    • Has irregular heart alerts
      Apple Watch Series 342mm supports irregular heart rate warnings, the average smartwatch does not. 43.7% of smartwatches support irregular heart rate warnings.
    • Has barometer
      Apple Watch Series 342mm includes a barometer, the average smartwatch does not. 45.6% of smartwatches include a barometer.
    • Has cadence sensor
      Apple Watch Series 342mm includes a cadence sensor, the average smartwatch does not. 20.1% of smartwatches include a cadence sensor.
    • Has external HR monitor
      Apple Watch Series 342mm supports external heart rate monitor compatibility, the average smartwatch does not. 41.3% of smartwatches support external heart rate monitor compatibility.
    • Includes wireless charging
      Apple Watch Series 342mm supports wireless charging, the average smartwatch does not. 24.9% of smartwatches support wireless charging.
    • 42 mAh larger battery capacity
      Apple Watch Series 342mm has a larger battery capacity than the average smartwatch (342 mAh vs 300 mAh). The average smartwatch battery is 300 mAh.
    • Has cellular module
      Apple Watch Series 342mm includes a cellular module, the average smartwatch does not. 17.2% of smartwatches include a cellular module.
    • Has NFC
      Apple Watch Series 342mm supports NFC, the average smartwatch does not. 42.5% of smartwatches support NFC.
    • Includes maps
      Apple Watch Series 342mm supports maps, the average smartwatch does not. 32.2% of smartwatches support maps.
    • Supports Wi-Fi
      Apple Watch Series 342mm supports Wi-Fi, the average smartwatch does not. 43.4% of smartwatches support Wi-Fi.
    • Supports Galileo
      Apple Watch Series 342mm supports Galileo navigation, the average smartwatch does not. 38.7% of smartwatches support Galileo navigation.
    • 0.25 inch larger screen size
      Apple Watch Series 342mm has a larger screen size than the average smartwatch (1.7 inch vs 1.40 inch). The average smartwatch screen is 1.40 inch.
    • 400 nits higher display brightness
      Apple Watch Series 342mm has higher display brightness than the average smartwatch (1,000 nits nits vs 600 nits nits). The average smartwatch reaches 600 nits nits.
    • Better case material
      Apple Watch Series 342mm uses aluminum, stainless steel, ceramic for the case material, while the average smartwatch uses polycarbonate.
    • 12.7 g lighter weight
      Apple Watch Series 342mm is lighter than the average smartwatch (32.3 g vs 45 g). The average smartwatch weighs 45 g.
    • More advanced operating system
      Apple Watch Series 342mm runs a more advanced operating system than the average smartwatch (watchOS vs Proprietary OS).
    • Supports Emergency SOS
      Apple Watch Series 342mm includes Emergency SOS, the average smartwatch does not. 42.4% of smartwatches include Emergency SOS.
    • Supports third-party apps
      Apple Watch Series 342mm supports third-party apps, the average smartwatch does not. 47.6% of smartwatches support third-party apps.
    • More advanced processor model
      Apple Watch Series 342mm uses the Apple S3 processor model, while the average smartwatch uses Snapdragon 400.
    • 4 GB more storage
      Apple Watch Series 342mm offers more internal storage than the average smartwatch (8 GB vs 4 GB). The average smartwatch provides 4 GB of storage.

    Total
    Overall
    Health
    Fitness
    Battery
    Connectivity
    Display & Design
    Smart features
    Hardware
    • No blood oxygen
      Apple Watch Series 342mm does not support blood oxygen monitoring, the average smartwatch does. 64.4% of smartwatches support blood oxygen monitoring.
    • No stress monitoring
      Apple Watch Series 342mm does not support stress monitoring, the average smartwatch does. 65.4% of smartwatches support stress monitoring.
      Some stress features may depend on third-party apps.
    • No routes
      Apple Watch Series 342mm does not support route support, the average smartwatch does. 50.4% of smartwatches support route support.
    • 5,534 m lower max altitude
      Apple Watch Series 342mm supports a lower maximum altitude than the average smartwatch (3,000 m vs 8,534 m). The average smartwatch reaches 8,534 m.
    • 6.25 day/s shorter battery life
      Apple Watch Series 342mm offers 0.8 day/s of battery life, while the average smartwatch offers 7 day/s.
      Converted from the reported 18-hour battery life.
    • 15 h shorter GPS battery life
      Apple Watch Series 342mm lasts less with GPS on than the average smartwatch (5 h vs 20 h). The average smartwatch lasts 20 h.
    • 15 h shorter training battery life
      Apple Watch Series 342mm lasts less in training mode than the average smartwatch (5 h vs 20 h). The average smartwatch lasts 20 h.
    • Not compatible with Android
      Apple Watch Series 342mm is not compatible with Android, the average smartwatch is. 95.3% of smartwatches are compatible with Android.
    • Older Bluetooth version
      Apple Watch Series 342mm supports an older Bluetooth version than the average smartwatch (4.2 vs 5.0). The average smartwatch uses 5.0.
    • No always-on display
      Apple Watch Series 342mm does not have an always-on display, the average smartwatch does. 66.4% of smartwatches have an always-on display.
    • Basic display type
      Apple Watch Series 342mm uses OLED display technology, while the average smartwatch features AMOLED.
      Retina branding.
    • 23 ppi lower pixel density
      Apple Watch Series 342mm has a lower pixel density than the average smartwatch (303 ppi vs 326 ppi). The average smartwatch display reaches 326 ppi.
    • Lower resolution
      Apple Watch Series 342mm has a display resolution of 312x 390, while the average smartwatch reaches 352x 430.
    • No smart alarm
      Apple Watch Series 342mm does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support this feature.
    • No gesture control
      Apple Watch Series 342mm does not support gesture control, the average smartwatch does. 78.1% of smartwatches support gesture control.
    • 0.25 GB less RAM
      Apple Watch Series 342mm has less RAM than the average smartwatch (0.8 GB vs 1 GB). The average smartwatch includes 1 GB of RAM.
      768 MB RAM
    • 4 year/s older release date
      Apple Watch Series 342mm is an older model than the average smartwatch (2,017 vs 2,021). The average smartwatch was released in 2,021.
      September 2,017
    • No blood oxygen
      Apple Watch Series 342mm does not support blood oxygen monitoring, the average smartwatch does. 64.4% of smartwatches support blood oxygen monitoring.
      What it is: A wrist-based feature that estimates blood oxygen saturation over time.
      When it matters: When you want health data from your wrist during the day or night.

      Importance: HIGH

      Apple Watch Series 342mm does not support blood oxygen monitoring, the average smartwatch does. 64.4% of smartwatches support blood oxygen monitoring.
    • No always-on display
      Apple Watch Series 342mm does not have an always-on display, the average smartwatch does. 66.4% of smartwatches have an always-on display.
      What it is: A display mode that keeps key information visible even when the watch is idle.
      When it matters: When you want the screen to be easy to read at a glance.

      Importance: HIGH

      Apple Watch Series 342mm does not have an always-on display, the average smartwatch does. 66.4% of smartwatches have an always-on display.
    • No stress monitoring
      Apple Watch Series 342mm does not support stress monitoring, the average smartwatch does. 65.4% of smartwatches support stress monitoring.
      Some stress features may depend on third-party apps.
      What it is: Stress estimates derived from heart rate, HRV, or similar body signals.
      When it matters: When you want health data from your wrist during the day or night.

      Importance: HIGH

      Apple Watch Series 342mm does not support stress monitoring, the average smartwatch does. 65.4% of smartwatches support stress monitoring.
    • 6.25 day/s shorter battery life
      Apple Watch Series 342mm offers 0.8 day/s of battery life, while the average smartwatch offers 7 day/s.
      Converted from the reported 18-hour battery life.
      What it is: The typical endurance the watch can deliver on a full charge under the stated usage pattern.
      When it matters: When you do not want to charge the watch too often.

      Importance: HIGH

      Good value: >=7 days

      Apple Watch Series 342mm offers 0.8 day/s of battery life, while the average smartwatch offers 7 day/s.0.75 day/s vs 7 day/s
    • Not compatible with Android
      Apple Watch Series 342mm is not compatible with Android, the average smartwatch is. 95.3% of smartwatches are compatible with Android.
      What it is: Shows how well the smartwatch works with Android pairing, syncing, and core features.
      When it matters: When you use an Android phone and want the watch to pair, sync, and keep its main features working properly.

      Importance: MEDIUM

      Apple Watch Series 342mm is not compatible with Android, the average smartwatch is. 95.3% of smartwatches are compatible with Android.
    • 15 h shorter GPS battery life
      Apple Watch Series 342mm lasts less with GPS on than the average smartwatch (5 h vs 20 h). The average smartwatch lasts 20 h.
      What it is: The expected runtime when satellite tracking stays active throughout use.
      When it matters: When you do not want to charge the watch too often.

      Importance: HIGH

      Good value: >=35 h

      Apple Watch Series 342mm lasts less with GPS on than the average smartwatch (5 h vs 20 h). The average smartwatch lasts 20 h.5 h vs 20 h
    • Basic display type
      Apple Watch Series 342mm uses OLED display technology, while the average smartwatch features AMOLED.
      Retina branding.
      What it is: The screen technology used by the watch, such as AMOLED, OLED, or memory-in-pixel LCD.
      When it matters: When you want the screen to be easy to read at a glance.

      Importance: HIGH

      Apple Watch Series 342mm uses OLED display technology, while the average smartwatch features AMOLED.OLED vs AMOLED
    • No smart alarm
      Apple Watch Series 342mm does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support this feature.
      What it is: A smart alarm tries to wake you during a lighter sleep phase within a chosen time window instead of at one fixed minute.
      When it matters: It matters if you wear your smartwatch overnight and want a gentler wake-up based on your sleep pattern rather than a standard fixed alarm.

      Importance: LOW

      Apple Watch Series 342mm does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support this feature.
    Total
    Overall
    Health
    Fitness
    Battery
    Connectivity
    Display & Design
    Smart features
    Hardware

    Graphic comparison of Apple Watch Series 3 42mm and other Smartwatches

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    Third-party reviews

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    (Reviews last updated: Apr 2026)

    What customers like about Apple Watch Series 3 42mm?

    • Standalone cellular connectivity allows calls and texts without an iPhone nearby
    • Highly accurate heart-rate monitoring and step counting
    • Excellent durability and water resistance up to 50 meters, suitable for swimming
    • Bright, high-quality Retina OLED display (1,000 nits) that is easy to read in direct sunlight
    • Smooth and responsive performance for core tasks due to the S3 dual-core chip
    • Large ecosystem of interchangeable bands and high-quality physical build materials
    • Affordable entry-point for first-time Apple Watch users

    What customers dislike about Apple Watch Series 3 42mm?

    • Significant battery drain when using LTE cellular or GPS for workouts
    • Lack of modern software support; no longer receives the latest watchOS updates
    • Lacks an Always-On Display, requiring a wrist flick to see the time
    • Slow music syncing over Bluetooth, which can take a very long time for large playlists
    • Small internal storage (8GB/16GB) frequently causes issues when trying to install system updates
    • Missing advanced health sensors found in newer models, such as ECG and Blood Oxygen
    • Device can become noticeably warm during extended cellular phone calls

    Expert reviews

    M
    makeerinover.co.uk
    21/10/2017
    Apple Watch Series 3 + Cellular Practical Review

    Erin’s review highlights the Apple Watch Series 3 as a 'smooth' companion offering daily convenience through features like a waterproof design, effective Siri functionality, and the 'Find My Phone' tool. The device streamlines routines with Apple Pay and Mac unlocking, though the reviewer found it is not a 'game changer' and does not feel like a strictly essential item. Key...Read more

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    zeipad.com
    Updated 2017
    Apple Watch Series 3 Review - zeiPAD DC Rainmaker +8Would you like more information on the technical specifications or current compatibility of the Se...

    The review from zeiPAD highlights the Apple Watch Series 3 as a refined, fast device featuring a responsive S3 chip, a barometric altimeter, and improved touchscreen functionality. Pros include instant performance, seamless AirPods integration, and reliable independent cellular connectivity for tasks like phone-free, active lifestyles. Significant drawbacks include the aesthetic...Read more

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    t3.com
    25/04/2022
    Apple Watch Series 3 review - T3

    T3 praises the Apple Watch Series 3 as a high-quality, value-driven wearable, highlighting its solid design and responsive S3 dual-core processor. Key advantages include built-in cellular connectivity, robust swim-proofing, and accurate fitness tracking with barometric elevation data. Conversely, the review notes significant drawbacks such as the lack of an always-on display, larger...Read more

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    macworld.com
    05/10/2017
    Apple Watch Series 3 (2017) review - Macworld

    Macworld’s review highlights the Apple Watch Series 3 LTE as a "game-changing" step toward iPhone independence, driven by impressive LTE connectivity and a significantly faster processor. However, this independence brings trade-offs, notably rapid battery drain during cellular use and initial connectivity issues, according to the analysis. While the hardware, including the...Read more

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    techadvisor.com
    04/10/2017
    Apple Watch Series 3 review: Phoning it in - Tech Advisor

    The Apple Watch Series 3 serves as a 'bridge product' that introduces cellular connectivity via an eSIM, allowing phone-free calls and texts. Key features include a design only 0.2mm thicker than its predecessor, along with premium haptics. However, practical, daily use of the LTE capabilities is limited for most users, and the required monthly network fees are a drawback. Battery...Read more

    D
    dcrainmaker.com
    07/11/2017
    Apple Watch Series 3: Sport & Fitness In-Depth Review

    The Apple Watch Series 3 (LTE) significantly enhances independence by enabling calls, texts, and Apple Music streaming without an iPhone, with seamless transitions between connectivity modes [1.1]. Key advantages include the integration of GymKit for gym equipment data syncing and a highly accurate barometric altimeter [1.1]. While the heart rate sensor remains a benchmark for...Read more

    U
    uk.pcmag.com
    16/10/2019
    Apple Watch Series 3 Review - Review 2019 - PCMag UK

    The Apple Watch Series 3 is highlighted by PCMag as a significant milestone for the product line, primarily due to the introduction of built-in cellular connectivity (LTE) that enables calling, messaging, and music streaming without an iPhone. Key advantages include clear call quality, a faster S3 dual-core processor, and a more accurate heart rate monitor compared to previous...Read more

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    mirror.co.uk
    18/09/2017
    Apple Watch Series 3 hands-on review: Who needs an iPhone...

    The Mirror’s hands-on review describes the Apple Watch Series 3 as a significant leap forward, primarily due to its new cellular connectivity which allows the watch to act as a primary line of communication for calls and messages without needing an iPhone nearby. Specific pros highlighted include its unchanged physical thickness despite the added LTE technology, 50-metre water...Read more

    T
    techradar.com
    16/06/2021
    Apple Watch 3 review

    The TechRadar review describes the Apple Watch Series 3 as a capable, fitness-oriented wearable that introduced cellular connectivity, boasting strong battery life lasting over two days and a vivid display. Key pros highlighted include its reliable water resistance for swimming and improved build quality over previous models. However, cons include the high cost of the LTE feature...Read more

    S
    spiegel.de
    20/09/2017
    Apple Watch Series 3 im Test: Was sie kann und was sie nicht kann

    Spiegel's review highlights the Apple Watch Series 3 as a significant evolutionary step, driven by LTE connectivity for independence from the iPhone. Performance improvements are substantial, featuring a 70% faster interface via the new S3 processor and a 'speaking' Siri. A new barometric altimeter is noted as a strong addition for tracking stairs and elevation. Key cons include...Read more

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    C
    curved.de
    23/01/2023
    Apple Watch Series 3 im Test: die (fast) perfekte Smartwatch

    The Curved.de review characterizes the Apple Watch Series 3 as a mature, high-performance device, driven by the faster S3 processor that eliminates UI lag. While the design remains consistent, key improvements include better fitness tracking, a new altimeter, and a polished, responsive interface. The primary advantage is the introduced LTE connectivity, enabling independence from...Read more

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    C
    computerbild.de
    15/06/2022
    Apple Watch 3: Test, Funktionen

    The Computer Bild review characterises the Apple Watch Series 3 as a significant milestone that introduced essential features like cellular connectivity and a faster dual-core S3 processor. Pros highlighted include the freedom to make calls and stream music without an iPhone, the addition of a barometric altimeter for tracking elevation, and a vibrant OLED Retina display, notes....Read more

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    C
    chip.de
    11/11/2017
    Apple Watch Series 3 (LTE) 42mm im Test

    The Apple Watch Series 3 (LTE) 42mm features an S3 dual-core processor that delivers a 70% performance boost and a 1,000-nit OLED display. Key advantages include improved heart rate monitoring, a barometric altimeter, and a fluid, responsive user interface. Featuring built-in LTE, the device allows for standalone calling, messaging, and Siri usage, marked by a red dot on the crown....Read more

    (Translated)Show original
    C
    chip.de
    09/11/2017
    Apple Watch Series 3 im Review

    Chip.de highlights the Apple Watch Series 3 for its significantly improved, lag-free performance driven by the S3 processor and the addition of standalone LTE cellular connectivity. Key pros include the ability to make calls and stream music without an iPhone, alongside a barometric altimeter for better elevation tracking. Conversely, the review notes significant battery drain when...Read more

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    I
    inside-digital.de
    18/01/2018
    Apple Watch Series 3 (LTE) im Test: Mobilfunk-Smartwatch

    The Apple Watch Series 3 offers a significant performance boost with its 70% faster S3 processor, enabling a fluid interface and, crucially, LTE cellular connectivity for independent calling and music streaming. It features improved tracking with a barometric altimeter, a swimproof design, and, on the 42mm model, a bright 1.65-inch OLED display. Pros include remarkably clear call...Read more

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    N
    netzwelt.de
    11/09/2019
    Apple Watch Series 3 im Test: Dank Apple Watch 5 jetzt ein Schnäppchen

    The Netzwelt review highlights the Apple Watch Series 3 as a significant, faster evolution in Apple's wearable line, primarily due to the introduction of LTE connectivity that allows for a more standalone 'wrist computer' experience without a nearby iPhone. The device features a new S3 dual-core processor and W2 wireless chip, offering substantially improved speed and fluidity in...Read more

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    S
    stern.de
    20/09/2017
    Apple Watch Series 3 Test: Die letzte Hürde ist gefallen

    The Apple Watch Series 3 review from Stern highlights the introduction of LTE connectivity via a built-in eSIM as the key advancement, making the device independent of the iPhone. Key pros include the significantly faster S3 processor, enabling fluid performance with WatchOS 4 and speaking capabilities for Siri, alongside the distinctive red dot on the digital crown. Fitness...Read more

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    R
    runwithlars.de
    26/07/2018
    Test: Apple Watch Series 3 - was taugt die Smartwatch als Fitness- und Laufuhr?

    The Apple Watch Series 3 is highlighted as a versatile fitness companion with a lightweight design, integrated GPS, and a responsive S3 chip, though it is not considered a bargain at its, at the time, €369 starting price. Key pros include excellent heart rate monitoring, a beautiful display, and robust app support for daily life and casual training. Functional drawbacks for serious...Read more

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    L
    leclaireur.fnac.com
    17/10/2017
    Test de l'Apple Watch Series 3 : enfin libérée

    The Apple Watch Series 3 introduces 4G/LTE connectivity for independence from the iPhone, paired with a faster S3 dual-core processor that enhances interface fluidity and Siri performance. While maintaining a familiar design, the cellular model features a red dot on the Digital Crown and a, ceramic back for improved reception. Key pros include the ability to stream music, send...Read more

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    0
    01net.com
    20/09/2017
    Test : Apple Watch Series 3, assez puissante pour couper les ponts avec l'iPhone

    The 01net review of the Apple Watch Series 3 highlights its increased independence, particularly with the 4G/LTE model, which enables users to receive calls, stream music, and use Siri without a tethered iPhone while maintaining all-day battery life. Performance is significantly enhanced by the new S3 dual-core processor, resulting in a 70% speed boost over the Series 2, a more...Read more

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    T
    tomsguide.fr
    29/10/2017
    Apple Watch Series 3 review: is the GPS model worth it?

    The Tom's Guide FR review positions the Apple Watch Series 3 GPS as a fast, affordable, and capable device, highlighting its 70% faster dual-core processor, improved W2 chip, and built-in altimeter. Key advantages include an exceptionally bright 1,000-nit OLED display, water resistance up to 50 meters, and a battery life of roughly two to two and a half days. While offering solid...Read more

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    C
    cnetfrance.fr
    11/12/2017
    Apple Watch Series 3 Review

    The Apple Watch Series 3 introduces cellular connectivity for phone calls, texts, and Siri without an iPhone, powered by a faster dual-core S3 processor that enhances responsiveness. Key features include a barometric altimeter for elevation tracking and consistent physical dimensions despite improved internal hardware. However, the device suffers from significantly reduced battery...Read more

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    M
    mac4ever.com
    06 octobre 2017
    Test de l'Apple Watch Series 3 (4G)

    The Mac4Ever review of the Apple Watch Series 3 (4G) highlights the significant shift toward device independence brought by cellular connectivity. Pros include the introduction of the S3 dual-core processor, which offers a 70% speed boost and allows Siri to finally speak directly from the watch, and the new barometric altimeter for tracking elevation during activities. The...Read more

    (Translated)Show original
    L
    lesnumeriques.com
    16/04/2026
    Apple Watch Series 3 : le test complet

    Les Numériques highlights the Apple Watch Series 3 as a significant evolution in the product line, primarily due to the introduction of cellular connectivity and the S3 dual-core processor. A key pro identified is the substantial performance boost, with the new chip making the interface and app loading noticeably faster and more fluid, although the design remains largely unchanged...Read more

    (Translated)Show original
    L
    lexpress.fr
    11/10/2017
    Apple Watch 3 Review: Is independence a good thing?

    The L'Express review highlights the Apple Watch Series 3 as a significant step toward "independence" due to 4G LTE connectivity, allowing for calls and messages without an iPhone. While the S3 chip provides a faster interface and the design remains similar, the device adds a useful barometric altimeter for tracking elevation. However, the review notes concerns over rapid battery...Read more

    (Translated)Show original
    S
    sport-passion.fr
    15/12/2017
    Apple Watch Series 3 review: A 4G cellular smartwatch

    The Sport-Passion review characterizes the Apple Watch Series 3 as a versatile, "phone on your wrist" device, bridging the gap between a smartwatch and a sports tool, especially with LTE connectivity that allows phone-free activity. Key technical improvements include the faster S3 processor for smoother navigation, integrated GPS, a barometric altimeter for elevation tracking, and...Read more

    (Translated)Show original
    L
    leclaireur.fnac.com
    12/11/2017
    Apple Watch Series 3 Cellular (LTE) review: truly independent, but watch out for battery life

    The Apple Watch Series 3 Cellular boasts a faster dual-core S3 processor and 16GB of storage, offering a responsive interface and ample space for music/podcasts. Its core advantage is 4G connectivity via an eSIM, enabling true autonomy for calls and messaging without a nearby iPhone, though it still requires one for initial setup. However, this independence comes at the cost of...Read more

    (Translated)Show original
    C
    computerhoy.20minutos.es
    14 de octubre de 2017
    Apple Watch Series 3, análisis y opinión - Computer Hoy

    The Apple Watch Series 3 marked a significant leap for the product line by introducing LTE cellular connectivity, allowing for standalone music streaming and calls, powered by a 70% faster S3 dual-core processor. While maintaining a similar design, the device incorporated a 1,000-nit display and a barometric altimeter, offering a more fluid interface and enhanced, independent...Read more

    (Translated)Show original
    S
    saggiamente.com
    15/01/2018
    Recensione: Apple Watch Series 3, diverso ma pur sempre lo stesso

    A 2018 review by Saggiamente positions the Apple Watch Series 3 as an evolutionary update, maintaining the Series 2 design while significantly boosting performance with the S3 dual-core chip. The device boasts superior speed, offering near-instant app loading and a more responsive, vocal Siri. Key pros include the addition of a barometric altimeter for precise elevation tracking,...Read more

    (Translated)Show original
    V
    video.corriere.it
    20/09/2017
    Apple Watch Series 3 (GPS) review: Siri talks now

    The Apple Watch Series 3 (GPS) review from Corriere della Sera highlights a 70% faster dual-core S3 processor that enables Siri to speak directly from the watch. While the 4G model was not yet available in Italy, the GPS version demonstrates a fluid interface and improved, multi-day battery life of up to two and a half days for moderate use. Key drawbacks include the need for daily...Read more

    (Translated)Show original
    M
    macitynet.it
    12/10/2017
    Recensione di Apple Watch 3, la prova di una settimana di Macitynet

    The Macitynet review highlights that the Apple Watch Series 3 represents a significant evolutionary step, primarily due to the introduction of the S3 chip, which offers a 70% performance boost over its predecessor. This hardware upgrade makes the user interface feel much more fluid and responsive, virtually eliminating the lag seen in earlier models when launching apps or using...Read more

    (Translated)Show original
    T
    tweakers.net
    11/10/2017
    Apple Watch Series 3 - Reviews - Tweakers

    User reviews on Tweakers.net characterize the Apple Watch Series 3 as a fast, reliable, and motivating fitness companion, highlighted by the fluid performance of its dual-core S3 chip. Key pros include a bright OLED Retina display, built-in GPS, accurate heart rate tracking, and waterproofing up to 50 meters. Seamless iPhone integration, allowing for call, text, and music control,...Read more

    (Translated)Show original
    I
    icreatemagazine.nl
    25/02/2019
    Apple Watch Series 3 of 4: welke past het best bij jou? - iCreate YouTube +6For more reviews, visit TechRadar.

    According to the iCreate Magazine guide, the Apple Watch Series 4 features a redesigned display that is 30% larger with thinner, rounded bezels compared to the rectangular, thick-bordered design of the Series 3. The Series 4 offers improved performance with a 64-bit S4 processor,, while introducing crucial health and safety features, including an electrical heart rate sensor and...Read more

    (Translated)Show original
    I
    iphoned.nl
    20/04/2018
    Tweede indruk: de Apple Watch Series 3 na zes maanden Explore the comprehensive tests listed above from publications like iCulture and TechRadar for d...

    The Apple Watch Series 3 offers significant standalone utility with LTE connectivity for calls and music, powered by a fast S3 processor and a barometric altimeter for enhanced fitness tracking. Its design remains consistent, featuring a durable, water-resistant casing, while the display provides rich colors and excellent haptic feedback. Key pros include seamless cellular...Read more

    (Translated)Show original
    G
    global.techradar.com
    23/06/2019
    Apple Watch 3 review - TechRadar

    The Apple Watch Series 3 introduced key advancements like LTE cellular connectivity for phone calls and music streaming, along with improved performance via a faster processor and the Taptic Engine. Despite maintaining the familiar square design, the LTE model features a red dot on the Digital Crown, supporting robust fitness tracking with GPS and water resistance. The device offers...Read more

    (Translated)Show original
    I
    id.nl
    06/10/2017
    Apple Watch Series 3 - Weinig verandering - ID.nl

    The Apple Watch Series 3 is characterized as an incremental update, retaining a familiar design while introducing significant internal performance upgrades, such as a 70% faster S3 dual-core chip and cellular connectivity. Pros include high-speed app performance, improved health tracking with a new barometric altimeter, and 50-meter water resistance. A key disadvantage highlighted...Read more

    (Translated)Show original
    X
    xgn.nl
    11/10/2017
    Apple Watch series 3 Review - Sneller, maar ook ... - XGN

    The XGN review highlights the Apple Watch Series 3 as a significant advancement featuring a faster S3 dual-core processor that ensures a fluid interface and instant app loading. The addition of a barometric altimeter improves fitness tracking, while standalone GPS functionality is praised, although cellular connectivity was unavailable in the Netherlands at launch. Key pros include...Read more

    (Translated)Show original
    I
    iculture.nl
    05/10/2017
    Apple Watch Series 3 review

    The iCulture review highlights the Apple Watch Series 3 as a major upgrade, featuring a 70% faster S3 processor that makes navigation and apps feel fluid. Key improvements include a barometric altimeter for precise elevation tracking in workouts and, on the cellular model, eSIM technology that enables phone-free calls and messaging. While retaining the familiar design compatible...Read more

    (Translated)Show original
    T
    tweakers.net
    20/11/2017
    Apple Watch Series 3 (Sportbandje, 42mm) Grijs (Zwart) Review

    This review highlights the Apple Watch Series 3 (42mm) as a functional daily companion, particularly for active users who benefit from its motion tracking and water resistance for swimming. The device offers an impressive battery life, lasting up to three days on a single charge. Key pros include enhanced everyday utility through seamless call handling and music control, reducing...Read more

    (Translated)Show original

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