OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Smartwatches Methodology v2.0
Smartwatches Methodology v2.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Smartwatches Methodology v2.0: technical specifications plus grades from 3,948 independent expert reviews and 12,633 video reviews, with 0% commercial bias.
Explore Smartwatches Methodology v2.0

Xiaomi Watch S2 42mm Review | 126 Data compared

Avg. price:~£130Screen size:?Battery life:7 daysDisplay type:AMOLED

Xiaomi Watch S2 42mm Review: Compare 126 technical specifications to see how this product ranks in the Smartwatches category and whether it is worth buying.

7.6/10

Overall score

Score
7.6/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 76% of models
Score components

70%

7.8

Technical score

30%

?

Reviews score

Reviews score 30% · 7.0 · no independent reviews yet
Until reviews appear, its review part counts as 7/10. Every model in this category gets the same split: reviews 30%, technical score 70%.
â–²Better than 76% of smartwatches
8.2

Value for money

Value for money
8.2/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 79% of models
Score components

70%

7.6

Overall score

30%

9.8

Price

â–²Better than 79%
7.8

Technical score

Technical score
7.8/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 82% of models
Score components

24%

7.5

Health

21%

9.4

Fitness

16%

6.3

Battery

14%

7.7

Smart features

12%

7.6

Connectivity

9%

8.0

Display & Design

4%

8.0

Hardware

â–²Better than 82%
?

Reviews score

Reviews score
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves.
Weighting: Big test sites count more, short reviews half as much as full tests. A video review counts half.
Share: Reviews are 30% of the overall score for every model in this category; each of the 5 needed reviews that is missing counts as 7/10.
Score distribution
â–¼
<55-66-77-88-99-10
Grades by review (0)
We have not found an independent test of this model yet, so its review part counts as 7/10.
User ratings collected online are not part of this score.
No expert tests yet
  • No image
No image
Best prices
    N/A~ £130
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
Loading category ranking...

Technical Specifications of smartwatch Xiaomi Watch S2 42mm

Technical score
Technical score
7.8/ 10
✕
What it is
An assessment of the smartwatchx27s technical performance, covering seven key areas: health, fitness, display & design, hardware, battery, smart features and connectivity.
When it matters
When you want to compare smartwatches based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 82% of models
Score components:

24%

7.5

Health

21%

9.4

Fitness

16%

6.3

Battery

14%

7.7

Smart features

12%

7.6

Connectivity

9%

8.0

Display & Design

4%

8.0

Hardware

7.8
Reviews score
?
Value for money
Value for money
8.2/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 79% of models
Score components:

70%

7.6

Overall score

30%

9.8

Price

8.2
Brand name
Xiaomi
Heart rate monitor
yes
This smartwatch includes a heart rate monitor. 10.5% of smartwatches include a heart rate monitor.
Blood oxygen monitoring
yes
This smartwatch supports blood oxygen monitoring. 33.4% of smartwatches support blood oxygen monitoring.
ECG
yes
This smartwatch supports ECG. 83.6% of smartwatches support ECG.
Irregular heart rate warnings
yes
This smartwatch supports irregular heart rate warnings. 51.9% of smartwatches support irregular heart rate warnings.
Show more
Accelerometer
yes
This smartwatch includes an accelerometer. 0.6% of smartwatches include an accelerometer.
Barometer
yes
This smartwatch includes a barometer. 50.6% of smartwatches include a barometer.
Gyroscope
yes
This smartwatch includes a gyroscope. 30.2% of smartwatches include a gyroscope.
Cadence sensor
no
This smartwatch does not include a cadence sensor. 31.2% of smartwatches include a cadence sensor.
Distance tracking
yes
This smartwatch supports distance tracking. 4.1% of smartwatches support distance tracking.
Show more
Battery life
7 days
Market range: <1 days – >16 days
This smartwatch offers a battery life of 7 days which is longer than that of 38.7% of smartwatches and equal to that of 17.1% of smartwatches.
Battery life in training mode
?
Battery life with GPS on
3 h
Market range: <5.75 h – >43 h
This smartwatch lasts 3 h with GPS on which is shorter than 98.1% of smartwatches and equal to that of 0.9% of smartwatches.
Battery power
403 mAh
Market range: <195 mAh – >475 mAh
This smartwatch has a battery capacity of 403 mAh which is larger than the batteries in 76.9% of smartwatches and equal to those in 0.2% of smartwatches.
Charge time
?
Show more
Operating system
MIUI Watch OS
This smartwatch runs MIUI Watch OS which is more advanced than the operating system in 51.1% of smartwatches and the same as that in 0.3% of smartwatches.
Software update frequency
occasional
This smartwatch has occasional software update support which is more active than that of 57.6% of smartwatches and equal to that of 36.2% of smartwatches.
Third-party app support
yes
This smartwatch supports third-party apps. 52.4% of smartwatches support third-party apps.
Support is limited to official app stores/approved app selection.
Notifications
yes
This smartwatch supports notifications. 0.3% of smartwatches support notifications.
Voice assistant support
yes
This smartwatch supports voice assistants. 32.4% of smartwatches support voice assistants.
Show more
Cellular module
no
This smartwatch does not include a cellular module. 18% of smartwatches include a cellular module.
SIM cards
0
GPS
yes
This smartwatch supports GPS. 43.9% of smartwatches support GPS.
Galileo support
yes
This smartwatch supports Galileo navigation. 61.6% of smartwatches support Galileo navigation.
Compass
yes
This smartwatch includes a compass. 47.5% of smartwatches include a compass.
Show more
Screen size
?
Display type
AMOLED
This smartwatch uses a AMOLED display type which is more advanced than that of 49.9% of smartwatches and the same as that of 50.1% of smartwatches.
Resolution
466x 466
This smartwatch has a display resolution of 466x466 which is higher than that of 87.4% of smartwatches and equal to that of 10.9% of smartwatches.
Pixel density
326 ppi
Market range: <207 ppi – >461 ppi
This smartwatch has a pixel density of 326 ppi which is higher than that of 46.2% of smartwatches and equal to that of 8.1% of smartwatches.
Display brightness
600 nits
Market range: <450 nits – >2k nits
This smartwatch reaches 600 nits of display brightness, which is higher than that of 38.8% of smartwatches and equal to that of 14.1% of smartwatches.
Show more
CPU speed
?
Processor model
?
RAM
?
Internal storage
?
External memory slot
no
This smartwatch does not include an external memory slot. 0.3% of smartwatches include an external memory slot.
Show more

Xiaomi Watch S2 42mm vs the average smartwatch

246810TotalHealthFitnessBatteryConnectivityDisplay & DesignSmart featuresHardware
  • ECG support
    This smartwatch supports ECG, the average smartwatch does not. 16.6% of smartwatches support ECG.
  • Temperature sensing
    This smartwatch includes a temperature sensor, the average smartwatch does not. 26.8% of smartwatches include a temperature sensor.
  • HRV tracking
    This smartwatch supports HRV tracking, the average smartwatch does not. 40.8% of smartwatches support HRV tracking.
  • Stronger display glass
    This smartwatch uses sapphire display glass, while the average smartwatch uses mineral glass.
    sapphire vs mineral glass
  • Maps support
    This smartwatch supports maps, the average smartwatch does not. 31.5% of smartwatches support maps.
  • Emergency SOS
    This smartwatch includes Emergency SOS, the average smartwatch does not. 42.8% of smartwatches include Emergency SOS.
    SOS feature has implementation limits (phone/app/subscription/activity dependent).
  • Supports wireless charging
    This smartwatch supports wireless charging, the average smartwatch does not. 24.5% of smartwatches support wireless charging.
  • NFC functionality
    This smartwatch supports NFC, the average smartwatch does not. 43.4% of smartwatches support NFC.
    NFC hardware is present, but functionality may be limited by region/app support.
  • ECG support
    This smartwatch supports ECG, the average smartwatch does not. 16.6% of smartwatches support ECG.
  • Temperature sensing
    This smartwatch includes a temperature sensor, the average smartwatch does not. 26.8% of smartwatches include a temperature sensor.
  • HRV tracking
    This smartwatch supports HRV tracking, the average smartwatch does not. 40.8% of smartwatches support HRV tracking.
  • Irregular heart rate alerts
    This smartwatch supports irregular heart rate warnings, the average smartwatch does not. 48.1% of smartwatches support irregular heart rate warnings.
  • Weight tracking
    This smartwatch supports weight tracking, the average smartwatch does not. 39.1% of smartwatches support weight tracking.
    Tracked through the companion app or smart-scale sync.
  • Barometer sensor included
    This smartwatch includes a barometer, the average smartwatch does not. 49.5% of smartwatches include a barometer.
  • 20 more exercise profiles
    This smartwatch supports more exercise modes than the average smartwatch (100 vs 80). The average smartwatch supports 80 exercise modes.
    Reported as at least 100 exercise modes.
    100 vs 80
  • Supports wireless charging
    This smartwatch supports wireless charging, the average smartwatch does not. 24.5% of smartwatches support wireless charging.
  • 103 mAh larger battery capacity
    This smartwatch has a larger battery capacity than the average smartwatch (403 mAh vs 300 mAh). The average smartwatch battery is 300 mAh.
    403 mAh vs 300 mAh
  • Maps support
    This smartwatch supports maps, the average smartwatch does not. 31.5% of smartwatches support maps.
  • NFC functionality
    This smartwatch supports NFC, the average smartwatch does not. 43.4% of smartwatches support NFC.
    NFC hardware is present, but functionality may be limited by region/app support.
  • Galileo satellite support
    This smartwatch supports Galileo navigation, the average smartwatch does not. 38.5% of smartwatches support Galileo navigation.
  • Newer Bluetooth version
    This smartwatch supports a newer Bluetooth version than the average smartwatch (5.2 vs 5). The average smartwatch uses 5.0.
    5.2 vs 5.0
  • Stronger display glass
    This smartwatch uses sapphire display glass, while the average smartwatch uses mineral glass.
    sapphire vs mineral glass
  • 1.4 mm thinner watch body
    This smartwatch is thinner than the average smartwatch (10.2 mm vs 11.6 mm). The average smartwatch thickness is 11.6 mm.
    10.20 mm vs 11.6 mm
  • Higher resolution
    This smartwatch has a display resolution of 466x466, while the average smartwatch reaches 352x430.
    466x466 vs 352x430
  • Better case material
    This smartwatch uses stainless steel for the case material, while the average smartwatch uses polycarbonate.
    stainless steel vs polycarbonate
  • Better band material
    This smartwatch uses silicone, leather for the band material, while the average smartwatch uses silicone.
    silicone, leather vs silicone
  • Emergency SOS
    This smartwatch includes Emergency SOS, the average smartwatch does not. 42.8% of smartwatches include Emergency SOS.
    SOS feature has implementation limits (phone/app/subscription/activity dependent).
  • Third-party app support
    This smartwatch supports third-party apps, the average smartwatch does not. 47.6% of smartwatches support third-party apps.
    Support is limited to official app stores/approved app selection.
  • More frequent updates
    This smartwatch receives occasional software updates, while the average smartwatch receives ended updates.
    occasional vs ended
  • More advanced operating system
    This smartwatch runs a more advanced operating system than the average smartwatch (MIUI Watch OS vs Proprietary OS).
    MIUI Watch OS vs Proprietary OS
  • 17 h shorter GPS battery life
    This smartwatch lasts less with GPS on than the average smartwatch (3 h vs 20 h). The average smartwatch lasts 20 h.
    3 h vs 20 h
  • No passcode
    This smartwatch does not include passcode protection, the average smartwatch does. 67.8% of smartwatches include passcode protection.
  • No smart alarm
    This smartwatch does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support smart alarms.
  • 6.12x less popular
    Xiaomi Watch S2 42mm has a lower popularity than the average smartwatch (1 vs 6.1).
    1 vs 6.12
  • No camera remote
    This smartwatch does not include built-in camera remote control, the average smartwatch does. 85.6% of smartwatches that are equipped with a camera include built-in camera remote control.
  • 6.12x less popular
    Xiaomi Watch S2 42mm has a lower popularity than the average smartwatch (1 vs 6.1).
    1 vs 6.12
  • 17 h shorter GPS battery life
    This smartwatch lasts less with GPS on than the average smartwatch (3 h vs 20 h). The average smartwatch lasts 20 h.
    3 h vs 20 h
  • No passcode
    This smartwatch does not include passcode protection, the average smartwatch does. 67.8% of smartwatches include passcode protection.
  • No smart alarm
    This smartwatch does not support a smart alarm, the average smartwatch does. 52.7% of smartwatches support smart alarms.
  • No camera remote
    This smartwatch does not include built-in camera remote control, the average smartwatch does. 85.6% of smartwatches that are equipped with a camera include built-in camera remote control.

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Shop video
Hands-on video, no verdict
Overview video

Third-party reviews

What we like about Xiaomi Watch S2 42mm

  • Premium design with a stainless steel frame and high-quality build materials
  • Vibrant 1.32-inch AMOLED display with high 466x466 resolution and excellent clarity
  • Comprehensive health tracking including SpO2, body composition, and temperature sensors
  • Comfortable and lightweight for all-day wear
  • Accurate dual-band GPS for outdoor fitness tracking
  • More affordable than many flagship rivals from Samsung or Apple

What we don't like about Xiaomi Watch S2 42mm

  • Battery life typically only lasts 2-3 days, requiring frequent charging compared to some fitness bands
  • Limited software support and occasional bugs in the Xiaomi ecosystem
  • Incompatibility with iOS devices (iPhones)
  • Proprietary magnetic charging pins can be finicky to align
  • Unreliable heart rate data reported by some users during high-intensity activities
  • Step counting in the Mi Fitness app can sometimes double-count by merging watch and phone data

Verdict

The Xiaomi Watch S2 42mm is a premium smartwatch featuring a 1.32-inch AMOLED touchscreen with a 466 x 466 resolution and 353 PPI, encased in a durable stainless steel frame. Key characteristics include a 305mAh battery providing up to 7 days of life, 5ATM water resistance, and advanced health tracking such as heart rate, SpO2, sleep, and a specialized body composition sensor that measures metrics like body fat percentage and bone salt content. Its main pros are the elegant, compact design suitable for smaller wrists, built-in GPS with dual-frequency GNSS for accurate tracking, and the ability to handle Bluetooth calls via its integrated speaker and microphone. However, potential cons include the lack of third-party app support for iOS users and a proprietary OS that offers less app variety than Wear OS competitors.

Compare Xiaomi Watch S2 42mm with other Smartwatches

1Product to compare no. 1
VS
2Product to compare no. 2
VS
3Product to compare no. 3 (optional)

Graphic comparison of Xiaomi Watch S2 42mm and other Smartwatches

No results found