Fitbit Ace 3 Review | 171 Data compared

double-arrow
  • Avg. price in UK: ~£60
  • Avg. price in US: ~$80
  • Form factor: wristband
  • Battery life: 8 days
  • Screen size: 1.47 inch

Fitbit Ace 3 review. Compare 171 technical specifications and user reviews to see how it ranks among fitness trackers and if it is worth buying.

6.4

Overall score

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

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

Score components:

80.0%

5.9

Technical Score

20.0%

8.6

User score

Good
5.9

Technical Score

What it is: An assessment of the fitness tracker's technical performance, covering eight key areas: health tracking, sports features, connectivity, display, battery, smart features, design, and app support.

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

Score components:

20.0%

4.8

Sports & Navigation

20.0%

4.4

Battery

18.0%

5.4

Health

18.0%

6.8

Display

8.0%

7.3

Smart Features

8.0%

7.2

App & Wellness

4.0%

8.0

Connectivity

4.0%

8.5

Design & Durability

Good
8.6

User score

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

When it matters: When you want to know how a fitness tracker performs in daily use and how reliable it remains over time according to user feedback.

Score components:

70.0%

8.0

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
3.9
(1025)
amazon
4.1
(877)

(Reviews last updated: Jun 2026)

Excellent
  • 6.7
    Swimming

    Score components:

    28.0%

    10

    ATM rating

    24.0%

    4.0

    Open-water swim mode

    18.0%

    10

    Waterproof depth rating

    15.0%

    4.0

    GPS

    15.0%

    3.5

    Battery life

  • 7.7
    Kids

    Score components:

    30.0%

    3.5

    Battery life

    25.0%

    9.0

    Weight

    20.0%

    10

    ATM rating

    15.0%

    9.7

    Screen size

    10.0%

    10

    Price

  • fitbit-ace-3
  • fitbit-ace-3
  • fitbit-ace-3
  • fitbit-ace-3
  • fitbit-ace-3
  • fitbit-ace-3
  • fitbit-ace-3
fitbit-ace-3
fitbit-ace-3
fitbit-ace-3
fitbit-ace-3
fitbit-ace-3
fitbit-ace-3
fitbit-ace-3

Best prices in UK

Best rankings

?

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

Verdict

The Fitbit Ace 3 is a rugged activity tracker designed for children aged 6+, featuring a 1.4-inch PMOLED grayscale touchscreen and up to 8 days of battery life. It tracks daily steps and active minutes while offering sleep monitoring and silent alarms to help build healthy routines. A major pro is its water resistance up to 50 meters, making it safe for swimming and spills, alongside its kid-friendly animated clock faces and durable silicone band that protects the screen. However, it lacks built-in GPS and heart rate monitoring, and some users may find its monochrome display less engaging than colorful alternatives.

Technical Specifications of Fitbit Ace 3

Technical Score

What it is: An assessment of the fitness tracker's technical performance, covering eight key areas: health tracking, sports features, connectivity, display, battery, smart features, design, and app support.

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

Score components:

20.0%

4.8

Sports & Navigation

20.0%

4.4

Battery

18.0%

5.4

Health

18.0%

6.8

Display

8.0%

7.3

Smart Features

8.0%

7.2

App & Wellness

4.0%

8.0

Connectivity

4.0%

8.5

Design & Durability

5.9
Fitbit Ace 3 has a technical score of 5.85 points, which is lower than 92% of fitness trackers.
User score

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

When it matters: When you want to know how a fitness tracker performs in daily use and how reliable it remains over time according to user feedback.

Score components:

70.0%

8.0

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
3.9
(1025)
amazon
4.1
(877)

(Reviews last updated: Jun 2026)

8.6
Fitbit Ace 3 has a user score of 8.59 points, which is higher than 69.5% of fitness trackers.
Popularity
What it is: An indicator based on the number of reviews received by the fitness tracker.
When it matters: When you prefer to buy a product chosen and reviewed by many other consumers.
10
Fitbit Ace 3 has a popularity of 10 points, which is higher than 60.1% of products in this category.
Ratio quality/price

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

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

Score components:

60.0%

6.4

Overall score

40.0%

10

Price

7.5
Fitbit Ace 3 has a quality-to-price ratio of 7.5 points, which is lower than 71.8% of products in this category.
Heart rate monitor
What it is: Sensor that measures heart rate in real time.
When it matters: When you care about live heart-rate feedback during training or resting trends outside of workouts.

Importance: HIGH

no
Fitbit Ace 3 does not support heart rate monitoring. 60.3% of fitness trackers support heart rate monitoring.
Resting heart rate
What it is: Measures heart rate while resting.
When it matters: When deeper insight into sleep quality, recovery, or overall readiness matters more than raw numbers alone.

Importance: MEDIUM

?
Fast/slow heart rate alerts
What it is: Alerts for heart rates that are too fast or too slow.
When it matters: When you want the tracker to warn you about unusual changes instead of only logging them.

Importance: LOW

no
Fitbit Ace 3 does not support high and low heart rate alerts. 33.7% of fitness trackers support high and low heart rate alerts.
Irregular heart rate alerts
What it is: Warns of irregular or abnormal heart rhythms.
When it matters: When you want the tracker to warn you about unusual changes instead of only logging them.

Importance: LOW

no
Fitbit Ace 3 does not support irregular heart rate alerts. 11.5% of fitness trackers support irregular heart rate alerts.
Blood oxygen sensor
What it is: Sensor that measures blood oxygen saturation.
When it matters: When blood oxygen readings are part of the health picture you want from the device instead of relying on heart rate and step count alone.

Importance: MEDIUM

no
Fitbit Ace 3 does not have a blood oxygen sensor. 26.1% of fitness trackers have a blood oxygen sensor.
Show more
GPS
What it is: Satellite navigation capability for positioning and tracking.
When it matters: When you train outdoors and want pace, distance, and route tracking without depending completely on your phone.

Importance: LOW

no
Fitbit Ace 3 does not have GPS. 11% of fitness trackers have GPS.
Satellite systems supported
What it is: States which satellite navigation systems the device can use for positioning.
When it matters: When you train outdoors and want stronger positioning, route guidance, and navigation independence from your phone.

Importance: LOW

?
GNSS bands supported
What it is: Number and type of GNSS frequency bands supported.
When it matters: When you train outdoors and want stronger positioning, route guidance, and navigation independence from your phone.

Importance: LOW

no
Fitbit Ace 3 does not support advanced GNSS bands. 8.9% of fitness trackers support advanced GNSS bands.
Galileo support
What it is: Supports Galileo satellite system.
When it matters: When you train outdoors and want stronger positioning, route guidance, and navigation independence from your phone.

Importance: LOW

no
Fitbit Ace 3 does not support Galileo. 4.9% of fitness trackers support Galileo.
Acquires GPS faster
What it is: Shows whether the tracker includes features that help it lock onto satellite positioning more quickly at the start of an outdoor activity.
When it matters: When you train outdoors and want stronger positioning, route guidance, and navigation independence from your phone.

Importance: LOW

no
Fitbit Ace 3 does not support faster GPS acquisition. 7.2% of fitness trackers support faster GPS acquisition.
Show more
Notifications
What it is: Delivers smartphone notifications on the watch.
When it matters: When getting calls, messages, and app alerts on your wrist saves you from checking your phone constantly.

Importance: MEDIUM

yes
Fitbit Ace 3 supports notifications. 27.5% of fitness trackers support notifications.
limited to call/SMS alerts.
Vibrating alerts
What it is: Provides vibration-based notifications and alerts.
When it matters: When staying reachable from your wrist helps you avoid checking your phone constantly.

Importance: LOW

yes
Fitbit Ace 3 supports vibration alerts. 16.3% of fitness trackers support vibration alerts.
Call control
What it is: Allows control of phone calls from the device.
When it matters: When staying reachable from your wrist helps you avoid checking your phone constantly.

Importance: LOW

no
Fitbit Ace 3 does not support call controls. 41.1% of fitness trackers support call controls.
Call answering
What it is: Allows answering calls directly from the device.
When it matters: When staying reachable from your wrist helps you avoid checking your phone constantly.

Importance: LOW

no
Fitbit Ace 3 does not support call answering. 1% of fitness trackers support call answering.
Calendar sync
What it is: Syncs calendar events with the connected device.
When it matters: When staying reachable from your wrist helps you avoid checking your phone constantly.

Importance: LOW

no
Fitbit Ace 3 does not support calendar sync. 19.9% of fitness trackers support calendar sync.
Show more
Activity reports
What it is: Generates summaries and insights from activity data.
When it matters: When you want the app to motivate you with goals, reports, coaching, or progress feedback over time.

Importance: LOW

yes
Fitbit Ace 3 supports activity reports. 5.7% of fitness trackers support activity reports.
via Fitbit app
Goal setting
What it is: Allows setting personal fitness or activity goals.
When it matters: When you want the app to motivate you with goals, reports, coaching, or progress feedback over time.

Importance: LOW

yes
Fitbit Ace 3 supports goal setting. 2.4% of fitness trackers support goal setting.
Achievements
What it is: Rewards progress and completed milestones.
When it matters: When you want the app to motivate you with goals, reports, coaching, or progress feedback over time.

Importance: LOW

yes
Fitbit Ace 3 supports achievements. 24.3% of fitness trackers support achievements.
Includes milestone trophies.
Inactivity alerts
What it is: Alerts when the user has been inactive for too long.
When it matters: When account rules, app costs, exports, or software flexibility affect whether the ecosystem suits you long term.

Importance: LOW

yes
Fitbit Ace 3 supports inactivity alerts. 23.7% of fitness trackers support inactivity alerts.
Move reminders supported.
Coaching
What it is: Provides guided training and workout advice.
When it matters: When you want the app to motivate you with goals, reports, coaching, or progress feedback over time.

Importance: LOW

no
Fitbit Ace 3 does not support coaching. 33% of fitness trackers support coaching.
Show more
Bluetooth version
What it is: Version of Bluetooth supported by the device.
When it matters: When wireless stability, pairing quality, and long-term phone compatibility matter more than Bluetooth being a simple checkbox.

Importance: LOW

Good value: >=5.0

4.2
Fitbit Ace 3 supports Bluetooth 4.2 which is newer than in 60.1% of fitness trackers and equal to that in 14.1% of fitness trackers.
Maximum Bluetooth range
What it is: States the maximum Bluetooth connection range supported under normal conditions.
When it matters: When compatibility with your phone, computer, accessories, or wireless setup affects how well the tracker fits into your ecosystem.

Importance: LOW

Good value: >=10 m

9 m
Fitbit Ace 3 offers a Bluetooth range of 9 m which is lower than that of 89.2% of fitness trackers and equal to that of 1.5% of fitness trackers.
NFC
What it is: Supports near-field communication for contactless features.
When it matters: When compatibility with your phone, computer, accessories, or wireless setup affects how well the tracker fits into your ecosystem.

Importance: LOW

no
Fitbit Ace 3 does not have NFC. 10.1% of fitness trackers have NFC.
Wi-Fi connectivity
What it is: Connects to wireless internet networks.
When it matters: When the tracker should sync, update, or download data directly without always routing everything through the phone.

Importance: LOW

no
Fitbit Ace 3 does not support Wi-Fi. 1.8% of fitness trackers support Wi-Fi.
Wi-Fi version
What it is: Version of Wi-Fi standard supported.
When it matters: When compatibility with your phone, computer, accessories, or wireless setup affects how well the tracker fits into your ecosystem.

Importance: LOW

no
Fitbit Ace 3 does not support modern Wi-Fi. 1% of fitness trackers support modern Wi-Fi.
no Wi-Fi support.
Show more
Battery life
What it is: Total time the battery lasts on a full charge.
When it matters: When the tracker needs to last through travel, sleep tracking, long workouts, or several days between charges.

Importance: HIGH

Good value: >5 days

8 days
Fitbit Ace 3 offers a battery life of 8 days which is shorter than that of 51.5% of fitness trackers and equal to that of 1.5% of fitness trackers.
Battery life with GPS on
What it is: Battery duration when GPS tracking is active.
When it matters: When you want fewer charging breaks during travel, longer workouts, sleep tracking, or continuous use.

Importance: LOW

Good value: >=8 hours

N/A
Battery life in training mode
What it is: Battery duration during active training sessions.
When it matters: When you want fewer charging breaks during travel, longer workouts, sleep tracking, or continuous use.

Importance: LOW

?
Battery life in power-saving mode
What it is: Battery duration when using power-saving mode.
When it matters: When you want fewer charging breaks during travel, longer workouts, sleep tracking, or continuous use.

Importance: LOW

N/A
Battery capacity
What it is: Energy storage capacity of the battery.
When it matters: When you want rough battery context behind the runtime claim instead of trusting the advertised hours alone.

Importance: MEDIUM

Good value: >=100 mAh

30 mAh
Fitbit Ace 3 has a battery capacity of 30 mAh which is lower than that of 95.8% of fitness trackers.
Show more
Display
What it is: Main interface showing information and metrics.
When it matters: When easier reading at a glance and better day-to-day screen comfort matter to you.

Importance: LOW

yes
Fitbit Ace 3 has a display. 24.1% of fitness trackers have a display.
Screen size
What it is: Physical size of the device’s display measured diagonally.
When it matters: When easier reading at a glance and better day-to-day screen comfort matter to you.

Importance: MEDIUM

1.47 inch
Fitbit Ace 3 has a screen size of 1.47 inch which is larger than that of 75.5% of fitness trackers and equal to that of 9.1% of fitness trackers.
Display type
What it is: Technology used for the screen, such as AMOLED or LCD.
When it matters: When display technology affects contrast, color quality, power efficiency, or how premium the screen feels.

Importance: MEDIUM

PMOLED
Fitbit Ace 3 uses PMOLED display technology which is less advanced than that of 53.5% of fitness trackers and the same as that of 7.4% of fitness trackers.
Screen resolution
What it is: Total number of pixels displayed on the screen.
When it matters: When easier reading at a glance and better day-to-day screen comfort matter to you.

Importance: MEDIUM

?
Pixel density
What it is: Number of pixels per inch determining screen sharpness.
When it matters: When easier reading at a glance and better day-to-day screen comfort matter to you.

Importance: LOW

Good value: >=280 ppi

230 ppi
Fitbit Ace 3 has a pixel density of 230 ppi which is lower than that of 56.9% of fitness trackers.
Show more
Form factor
What it is: Overall physical design and shape.
When it matters: When materials, shape, and build details affect comfort, durability, or how discreet the device feels.

Importance: LOW

wristband
Hybrid design
What it is: Combines analog and digital display elements.
When it matters: When materials, shape, and build details affect comfort, durability, or how discreet the device feels.

Importance: LOW

no
Fitbit Ace 3 does not support Hybrid design. 2.4% of fitness trackers support Hybrid design.
Designed for kids
What it is: Indicates whether the fitness tracker is explicitly designed for children, with child-focused sizing, branding, safety limits, or kid-oriented activity features.
When it matters: This matters when you want a tracker that is genuinely child-focused rather than just a smaller adult model.

Importance: LOW

yes
Fitbit Ace 3 is designed for kids. 98.1% of fitness trackers are designed for kids.
Explicit kids tracker line.
Replaceable watch band
What it is: Ability to replace the wristband with other styles.
When it matters: When strap comfort, fit, or the ability to swap bands matters for sport, style, or replacement.

Importance: LOW

yes
Fitbit Ace 3 has a replaceable watch band. 24.4% of fitness trackers have a replaceable watch band.
Band width
What it is: Width of the strap where it connects to the watch.
When it matters: When strap comfort, fit, or the ability to swap bands matters for sport, style, or replacement.

Importance: LOW

16 mm
Show more

Fitbit Ace 3 vs the average fitness tracker

  • 0.43 inch larger screen size
    Fitbit Ace 3 has a higher screen size than the average fitness tracker (1.5 inch vs 1.04 inch). The average fitness tracker has a screen size of 1.04 inch.
    What it is: Physical size of the device’s display measured diagonally.
    When it matters: When easier reading at a glance and better day-to-day screen comfort matter to you.

    Importance: MEDIUM

    Fitbit Ace 3 has a higher screen size than the average fitness tracker (1.5 inch vs 1.04 inch). The average fitness tracker has a screen size of 1.04 inch.1.47 inch vs 1.04 inch
  • Branded damage-resistant glass
    Fitbit Ace 3 uses branded damage-resistant glass, while the average fitness tracker does not. 22.2% of fitness trackers use branded damage-resistant glass.
    Corning Gorilla Glass 3.
    What it is: Shows whether the display uses a named reinforced glass brand instead of unspecified screen protection.
    When it matters: When scratch resistance and long-term display protection matter for everyday wear.

    Importance: LOW

    Fitbit Ace 3 uses branded damage-resistant glass, while the average fitness tracker does not. 22.2% of fitness trackers use branded damage-resistant glass.
  • Mac OS X compatible
    Fitbit Ace 3 is compatible with Mac OS X, while the average fitness tracker is not. 27.5% of fitness trackers are compatible with Mac OS X.
    Via Fitbit Connect.
    What it is: Compatible with macOS devices.
    When it matters: When compatibility with your phone, computer, accessories, or wireless setup affects how well the tracker fits into your ecosystem.

    Importance: LOW

    Fitbit Ace 3 is compatible with Mac OS X, while the average fitness tracker is not. 27.5% of fitness trackers are compatible with Mac OS X.
  • Modern Bluetooth version
    Fitbit Ace 3 supports a newer Bluetooth version than the average fitness tracker (4.2 vs 4.0). The average fitness tracker supports Bluetooth 4.0.
    What it is: Version of Bluetooth supported by the device.
    When it matters: When wireless stability, pairing quality, and long-term phone compatibility matter more than Bluetooth being a simple checkbox.

    Importance: LOW

    Good value: >=5.0

    Fitbit Ace 3 supports a newer Bluetooth version than the average fitness tracker (4.2 vs 4.0). The average fitness tracker supports Bluetooth 4.0.4.2 vs 4.0
  • 22.8% lighter
    Fitbit Ace 3 is lighter than the average fitness tracker (19.3 g vs 25 g). The average fitness tracker weighs 25 g.
    What it is: Weight of the device including strap.
    When it matters: When overall size, thickness, or weight affects comfort during all-day wear, sleep, or exercise.

    Importance: LOW

    Good value: <25 g

    Fitbit Ace 3 is lighter than the average fitness tracker (19.3 g vs 25 g). The average fitness tracker weighs 25 g.19.3 g vs 25 g
  • More child-focused design
    Fitbit Ace 3 is designed for kids, while the average fitness tracker is not. 2.3% of fitness trackers are designed for kids.
    Explicit kids tracker line.
    What it is: Indicates whether the fitness tracker is explicitly designed for children, with child-focused sizing, branding, safety limits, or kid-oriented activity features.
    When it matters: This matters when you want a tracker that is genuinely child-focused rather than just a smaller adult model.

    Importance: LOW

    Fitbit Ace 3 is designed for kids, while the average fitness tracker is not. 2.3% of fitness trackers are designed for kids.
  • Gesture control
    Fitbit Ace 3 supports gesture controls, while the average fitness tracker does not. 40.8% of fitness trackers support gesture controls.
    What it is: Allows control through hand or wrist gestures.
    When it matters: When buttons, crowns, gestures, or direct controls affect how quickly you can use the device mid-activity.

    Importance: LOW

    Fitbit Ace 3 supports gesture controls, while the average fitness tracker does not. 40.8% of fitness trackers support gesture controls.
  • 7.4% higher user score
    Fitbit Ace 3 has a higher user score than the average fitness tracker (8.59 vs 8.000).
    What it is: A rating that combines user reviews and the total number of reviews received by the fitness tracker.
    When it matters: When you want to know how a fitness tracker performs in daily use and how reliable it remains over time according to user feedback.
    Fitbit Ace 3 has a higher user score than the average fitness tracker (8.59 vs 8.000).8.59 vs 8
  • 0.43 inch larger screen size
    Fitbit Ace 3 has a higher screen size than the average fitness tracker (1.5 inch vs 1.04 inch). The average fitness tracker has a screen size of 1.04 inch.
  • Branded damage-resistant glass
    Fitbit Ace 3 uses branded damage-resistant glass, while the average fitness tracker does not. 22.2% of fitness trackers use branded damage-resistant glass.
  • Mac OS X compatible
    Fitbit Ace 3 is compatible with Mac OS X, while the average fitness tracker is not. 27.5% of fitness trackers are compatible with Mac OS X.
  • Modern Bluetooth version
    Fitbit Ace 3 supports a newer Bluetooth version than the average fitness tracker (4.2 vs 4.0). The average fitness tracker supports Bluetooth 4.0.
  • Gesture control
    Fitbit Ace 3 supports gesture controls, while the average fitness tracker does not. 40.8% of fitness trackers support gesture controls.
  • 22.8% lighter
    Fitbit Ace 3 is lighter than the average fitness tracker (19.3 g vs 25 g). The average fitness tracker weighs 25 g.
  • More child-focused design
    Fitbit Ace 3 is designed for kids, while the average fitness tracker is not. 2.3% of fitness trackers are designed for kids.
  • No heart rate monitoring
    Fitbit Ace 3 does not support heart rate monitoring, while the average fitness tracker does. 60% of fitness trackers support heart rate monitoring.
  • No sleep reports
    Fitbit Ace 3 does not support sleep reports, while the average fitness tracker does. 84.8% of fitness trackers support sleep reports.
  • No automatic activity detection
    Fitbit Ace 3 does not support automatic activity detection, while the average fitness tracker does. 50.3% of fitness trackers support automatic activity detection.
  • No pace measurement
    Fitbit Ace 3 does not support pace measurement, while the average fitness tracker does. 61.3% of fitness trackers support pace measurement.
  • No distance tracking
    Fitbit Ace 3 does not support distance tracking, while the average fitness tracker does. 95.3% of fitness trackers support distance tracking.
  • No exercise tagging
    Fitbit Ace 3 does not support exercise tagging, while the average fitness tracker does. 58.8% of fitness trackers support exercise tagging.
  • 10 fewer stored activities
    Fitbit Ace 3 has fewer stored activities than the average fitness tracker (0 vs 10). The average fitness tracker stores 10 activities.
  • 72.7% smaller battery capacity
    Fitbit Ace 3 has a lower battery capacity than the average fitness tracker (30 mAh vs 110 mAh). The average fitness tracker has 110 mAh of battery capacity.
  • 2 days shorter battery life
    Fitbit Ace 3 has a lower battery life than the average fitness tracker (8 days vs 10 days). The average fitness tracker has 10 days of battery life.
  • 6.9% lower pixel density
    Fitbit Ace 3 has a lower pixel density than the average fitness tracker (230 ppi vs 247 ppi). The average fitness tracker has a pixel density of 247 ppi.
  • 1 m shorter Bluetooth range
    Fitbit Ace 3 has a shorter Bluetooth range than the average fitness tracker (9 m vs 10 m). The average fitness tracker offers a Bluetooth range of 10 m.
  • 2 mm thicker design
    Fitbit Ace 3 is thicker than the average fitness tracker (13 mm vs 11 mm). The average fitness tracker has a thickness of 11 mm.
  • 10 °C higher minimum operating temperature
    Fitbit Ace 3 has a higher minimum operating temperature than the average fitness tracker (-10 °C vs 0 °C). The average fitness tracker supports a minimum operating temperature of 0 °C.
  • No weight tracking
    Fitbit Ace 3 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.
    Weight tracking is disabled on child-focused accounts.
  • No calorie burn tracking
    Fitbit Ace 3 does not support calorie burn tracking, while the average fitness tracker does. 98.1% of fitness trackers support calorie burn tracking.
    Calorie tracking was removed for child accounts.
  • No BMI tracking
    Fitbit Ace 3 does not support BMI tracking, while the average fitness tracker does. 71% of fitness trackers support BMI tracking.
  • No heart rate monitoring
    Fitbit Ace 3 does not support heart rate monitoring, while the average fitness tracker does. 60% of fitness trackers support heart rate monitoring.
    What it is: Sensor that measures heart rate in real time.
    When it matters: When you care about live heart-rate feedback during training or resting trends outside of workouts.

    Importance: HIGH

    Fitbit Ace 3 does not support heart rate monitoring, while the average fitness tracker does. 60% of fitness trackers support heart rate monitoring.
  • No automatic activity detection
    Fitbit Ace 3 does not support automatic activity detection, while the average fitness tracker does. 50.3% of fitness trackers support automatic activity detection.
    What it is: Automatically recognizes and records physical activities.
    When it matters: When you want common workouts captured even on days when you forget to start tracking manually.

    Importance: MEDIUM

    Fitbit Ace 3 does not support automatic activity detection, while the average fitness tracker does. 50.3% of fitness trackers support automatic activity detection.
  • No pace measurement
    Fitbit Ace 3 does not support pace measurement, while the average fitness tracker does. 61.3% of fitness trackers support pace measurement.
    What it is: Measures running or walking speed.
    When it matters: When you want the tracker to capture more workouts and training details with less manual effort.

    Importance: MEDIUM

    Fitbit Ace 3 does not support pace measurement, while the average fitness tracker does. 61.3% of fitness trackers support pace measurement.
  • No distance tracking
    Fitbit Ace 3 does not support distance tracking, while the average fitness tracker does. 95.3% of fitness trackers support distance tracking.
    What it is: Calculates distance covered during exercise.
    When it matters: When you want the tracker to capture more workouts and training details with less manual effort.

    Importance: HIGH

    Fitbit Ace 3 does not support distance tracking, while the average fitness tracker does. 95.3% of fitness trackers support distance tracking.
  • No exercise tagging
    Fitbit Ace 3 does not support exercise tagging, while the average fitness tracker does. 58.8% of fitness trackers support exercise tagging.
    What it is: Allows tagging or categorization of specific exercises.
    When it matters: When you want the tracker to capture more workouts and training details with less manual effort.

    Importance: LOW

    Fitbit Ace 3 does not support exercise tagging, while the average fitness tracker does. 58.8% of fitness trackers support exercise tagging.
  • 72.7% smaller battery capacity
    Fitbit Ace 3 has a lower battery capacity than the average fitness tracker (30 mAh vs 110 mAh). The average fitness tracker has 110 mAh of battery capacity.
    What it is: Energy storage capacity of the battery.
    When it matters: When you want rough battery context behind the runtime claim instead of trusting the advertised hours alone.

    Importance: MEDIUM

    Good value: >=100 mAh

    Fitbit Ace 3 has a lower battery capacity than the average fitness tracker (30 mAh vs 110 mAh). The average fitness tracker has 110 mAh of battery capacity.30 mAh vs 110 mAh
  • No sleep reports
    Fitbit Ace 3 does not support sleep reports, while the average fitness tracker does. 84.8% of fitness trackers support sleep reports.
    What it is: Shows whether the companion platform turns sleep data into reports or summaries instead of only raw nightly logs.
    When it matters: When you want sleep data turned into clearer nightly summaries instead of digging through raw charts on your own.

    Importance: LOW

    Fitbit Ace 3 does not support sleep reports, while the average fitness tracker does. 84.8% of fitness trackers support sleep reports.
  • No weight tracking
    Fitbit Ace 3 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.
    Weight tracking is disabled on child-focused accounts.
    What it is: Records body weight measurements.
    When it matters: When tracking daily habits and body trends beyond workouts matters to your health routine.

    Importance: LOW

    Fitbit Ace 3 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.

Graphic comparison of Fitbit Ace 3 and

Attribute category
Attribute
No results found

Third-party reviews

(Reviews last updated: Jun 2026)

What customers like about Fitbit Ace 3?

  • Impressive battery life lasting up to 8 days per charge
  • Durable, water-resistant design suitable for swimming and active play
  • Engaging animated clock faces and badges that motivate kids to move
  • Comfortable silicone strap that is gentle on sensitive skin
  • Useful 'Kid View' in the app allows children to see their own stats safely
  • Passive tracking of steps and sleep without needing manual input

What customers dislike about Fitbit Ace 3?

  • Lacks GPS or location tracking features for safety monitoring
  • Monochrome/greyscale display is less vibrant than some competitors
  • Setup and syncing process can be complex and non-intuitive for parents
  • Charging cable is considered too short by many users
  • Does not support heart rate monitoring or floor climbing stats
  • Switching between parent and child views in the app can be tedious

Expert reviews

T
techradar.com
19/05/2021

Fitbit Ace 3 Review Summary The Fitbit Ace 3 is a rugged, water-resistant fitness tracker tailored for children aged six and up, offering a rounded design, a bright monochrome PMOLED touchscreen, and an impressive eight-day battery life. Built to endure rough play, its protective silicone band prevents screen damage and resists skin irritation, making it highly comfortable for...Read more

D
digitaltrends.com
26/04/2022

Fitbit Ace 3 Review Summary The Fitbit Ace 3 is a highly engaging, kid-friendly fitness tracker designed exclusively to help elementary-aged children adopt a healthy lifestyle. Built with a modular, kid-sized design, the tracker unit sits inside a rugged silicone band that easily fits smaller wrists and protects the device from rough daily play. The software purposefully avoids...Read more

F
futurefive.co.nz
30/04/2021

The Fitbit Ace 3 is a child-focused fitness tracker designed to motivate kids aged six and older to stay active and healthy. Built as a small pebble-sized screen inside a customizable silicone band, the device steps away from traditional gendered colors to offer refreshing combinations like Cosmic Blue/Astro Green and Black/Sport Red. A key feature upgrade is the "Kid view" option,...Read more

T
t3.com
04/04/2021

Fitbit Ace 2 vs Fitbit Ace 3 Summary The Fitbit Ace 3 serves as a refined, slightly chunkier upgrade to the Fitbit Ace 2, offering several notable performance enhancements while maintaining a kid-friendly design. Its primary pros include a significantly improved, crystal-clear greyscale touchscreen that is noticeably brighter than its predecessor, alongside more interactive watch...Read more

S
shanethegamer.com
06/05/2021

In his review for Shane the Gamer (STG), Shane Thomas highlights the Fitbit Ace 3 as an ultimate health and wellbeing wearable tailored specifically for children aged 6 and older. The reviewer notes several prominent pros, including its highly durable design featuring cushioned edges and a flexible, near-unbreakable silicone strap built to survive rough playground play and swimming....Read more

C
connectthewatts.com
01/09/2021

Fitbit Ace 3 Review Summary However, the device has several notable cons regarding its setup and technical capabilities. The initial pairing and account creation process is slow and clunky, requiring a multi-step Family Plan setup and suffering from delayed email verifications. The software sync takes up to ten minutes and demands a minimum 40% battery charge to initiate....Read more

T
techadvisor.com
01/06/2021

The Fitbit Ace 3 is a durable, kid-friendly activity tracker specifically designed for children aged 6 to 12. Built to withstand a rough-and-tumble lifestyle, it features a robust wraparound silicone bumper, a watch-like secure buckle, and water resistance up to 50 meters, making it safe for swimming or ocean use. The tracker boasts an impressive eight-day battery life and an...Read more

E
expertreviews.co.uk
27/04/2021

The Expert Reviews review of the Fitbit Ace 3 highlights it as an intuitive and highly effective activity and sleep tracker specifically tailored for children. Retailing at £70, it boasts key pros such as a bright, easily readable monochrome POLED display, seamless integration with a parent-controlled companion app utilizing a specialized "Kid View," and water resistance up to 50...Read more

A
androidcentral.com
17/03/2021

Fitbit Ace 3 Review Summary The Fitbit Ace 3 is a basic and fun activity and sleep tracker specifically designed for children aged 6 to 12. Priced at $79.95, this swim-proof device excels at tracking essential daily statistics like steps, active minutes, and comprehensive sleep data without overwhelming younger users with adult metrics like heart rate or calorie burn. Parents will...Read more

T
t3.com
26/03/2021

The Fitbit Ace 3 is an exceptional fitness tracker designed for children aged six and up, expanding on its predecessor with integrated heart-rate tracking and a curvier, durable silicone design available in blue/green or black/red variations. It relies on a highly responsive greyscale PMOLED touchscreen that activates with a wrist flick and uses animated watch faces, like a reactive...Read more

P
pcmag.com
29/06/2023

The Fitbit Ace 3, rated as a "Good" kids' tracker by PCMag, features a comfortable, waterproof design (up to 50 meters) and an improved battery life lasting up to 8 days. Key pros include 28 animated, evolving clock faces that motivate activity, free activity/sleep tracking, and smartphone notification capabilities. However, notable cons identified include the lack of GPS or...Read more

G
geekbecois.com
23/04/2021

summary of the Fitbit Ace 3 fitness tracker: Review Summary The Fitbit Ace 3 is a durable fitness tracker designed for children aged six and older that offers noticeable physical and functional upgrades over its predecessor. Retailing for $99.99 CAD at Best Buy, it features a monochrome touchscreen that is 20% brighter than the previous model, a 50-metre water resistance rating, and...Read more

R
rtl.be
09/04/2021

The Fitbit Ace 3 is a robust, kid-friendly activity tracker tailored for children aged 6 and up, designed to help parents monitor their children's daily physical activity and sleep habits. The reviewer tested the device with their two children (ages 5 and 7) and highlighted its excellent 8-day battery life, 50-metre water resistance, and highly durable rubber casing that...Read more

F
flair.be
28/04/2021

The Fitbit Ace 3 review by Flair.be highlights it as a rugged, highly functional activity tracker tailored specifically for children aged six and up. On the positive side, the device excels in encouraging movement through a system of vibrant, animated clock faces that evolve as the child takes steps, alongside motivating virtual badges and hourly movement reminders. Its hardware is...Read more

U
uk.pcmag.com
29/06/2023

The Fitbit Ace 3 is an affordable, subscription-free activity and sleep tracker designed for children aged six to 12. Priced at $79.95, it features a comfortable, water-resistant silicone design (up to 50 meters) with a 1.4-inch OLED monochrome touchscreen and physical buttons,,. The tracker offers highly popular, kid-friendly aesthetics, including swappable cartoon-coloured bands...Read more

T
techprincess.it
16/04/2021

The Fitbit Ace 3, as reviewed by TechPrincess, is a durable, water-resistant activity tracker for children aged six and up, featuring a monochrome touchscreen with animated watch faces that encourage movement. Parents can manage activity goals and monitor sleep data through the dedicated "parent view" in the companion app. However, the evaluation notes limitations, including a...Read more

M
macitynet.it
05/04/2021

The Fitbit Ace 3 is an activity tracker designed specifically for children aged 6 to 10, featuring a durable silicone band with rounded edges to withstand rough movements, mud, and water. The device features a bright monochromatic touchscreen, a side haptic button, and simple vertical navigation for features like stopwatches and daily stats. Operating through the Fitbit app, it...Read more

G
gadgetgear.nl
06/06/2021

The GadgetGear review awards the Fitbit Ace 3 a 3.5/5 rating, praising it as a durable, 8-day battery life tracker that motivates children through active, milestone-based animations and provides parents with clear activity insights. Pros include a rugged, child-friendly design and excellent step-tracking engagement, while cons include a small, grayscale PMOLED display and the lack...Read more

Video reviews

Compare Fitbit Ace 3 with

VS
VS

Compare