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MyKronoz ZeFit4 Review | 171 Data compared

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  • Avg. price: ~£25
  • Form factor: wristband
  • Battery life: 5 days
  • Screen size: 1.06 inch

MyKronoz ZeFit4 review. Compare 171 technical specifications and user reviews to see how it ranks among fitness trackers and if it is worth buying.

6.2

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%

6.1

Technical Score

20.0%

6.9

User score

Good
6.1

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%

6.8

Sports & Navigation

20.0%

4.3

Battery

18.0%

5.4

Health

18.0%

5.4

Display

8.0%

8.2

Smart Features

8.0%

8.0

App & Wellness

4.0%

7.1

Connectivity

4.0%

7.7

Design & Durability

Good
6.9

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%

6.0

User reviews

30.0%

8.9

Popularity

User score:
United Kingdom
amazon
3.0
(172)
amazon
3.0
(5)

(Reviews last updated: June 2026)

Good
  • 4.6
    Swimming

    Score components:

    28.0%

    9.0

    ATM rating

    24.0%

    4.0

    Open-water swim mode

    18.0%

    1.2

    Waterproof depth rating

    15.0%

    4.0

    GPS

    15.0%

    2.0

    Battery life

  • 6.7
    Kids

    Score components:

    30.0%

    2.0

    Battery life

    25.0%

    9.6

    Weight

    20.0%

    9.0

    ATM rating

    15.0%

    5.8

    Screen size

    10.0%

    10

    Price

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Best rankings

?

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

Verdict

The MyKronoz ZeFit4 is a lightweight, 17-gram activity tracker featuring a 1.06-inch TFT color touchscreen with a 160x64 pixel resolution. It is powered by an 80 mAh Li-ion battery that offers up to 5 days of standby time and recharges in approximately 1.5 hours. Key characteristics include IP67 water resistance, a 3-axis accelerometer for tracking steps, distance, and calories, and comprehensive sleep monitoring. Main pros include its slim 9.3mm design, interchangeable bands, and smart features like music control, camera remote, and weather forecasts. However, notable cons include its limited 7-day on-device memory, the lack of a built-in heart rate sensor (available only in the HR version), and a maximum Bluetooth range restricted to approximately 5 meters.

Technical Specifications of MyKronoz ZeFit4

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%

6.8

Sports & Navigation

20.0%

4.3

Battery

18.0%

5.4

Health

18.0%

5.4

Display

8.0%

8.2

Smart Features

8.0%

8.0

App & Wellness

4.0%

7.1

Connectivity

4.0%

7.7

Design & Durability

6.1
MyKronoz ZeFit4 has a technical score of 6.05 points, which is lower than 87.8% 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%

6.0

User reviews

30.0%

8.9

Popularity

User score:
United Kingdom
amazon
3.0
(172)
amazon
3.0
(5)

(Reviews last updated: June 2026)

6.9
MyKronoz ZeFit4 has a user score of 6.87 points, which is lower than 87.8% 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.
8.9
MyKronoz ZeFit4 has a popularity of 8.9 points, which is higher than 58.7% 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%

6.2

Overall score

40.0%

10

Price

7.4
MyKronoz ZeFit4 has a quality-to-price ratio of 7.4 points, which is lower than 80.3% 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
MyKronoz ZeFit4 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

no
MyKronoz ZeFit4 does not support Resting heart rate. 48.5% of fitness trackers support Resting heart rate.
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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 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

no
MyKronoz ZeFit4 supports no satellite systems which is less versatile than that of 12.2% of fitness trackers and the same as that of 87.8% of fitness trackers.
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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 does not support faster GPS acquisition. 7.2% of fitness trackers support faster GPS acquisition.
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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
MyKronoz ZeFit4 supports notifications. 27.5% of fitness trackers support notifications.
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
MyKronoz ZeFit4 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

?
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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 supports activity reports. 5.7% of fitness trackers support activity reports.
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
MyKronoz ZeFit4 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

no
MyKronoz ZeFit4 does not support achievements. 76.2% of fitness trackers support achievements.
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
MyKronoz ZeFit4 supports inactivity alerts. 23.7% of fitness trackers support inactivity alerts.
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
MyKronoz ZeFit4 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

4.0
MyKronoz ZeFit4 supports Bluetooth 4.0 which is newer than in 5.1% of fitness trackers and equal to that in 51.5% 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

5 m
MyKronoz ZeFit4 offers a Bluetooth range of 5 m which is lower than that of 96.2% of fitness trackers and equal to that of 2.3% 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
MyKronoz ZeFit4 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
MyKronoz ZeFit4 does not support Wi-Fi. 1.8% of fitness trackers support Wi-Fi.
no Wi-Fi connectivity.
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
MyKronoz ZeFit4 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

5 days
MyKronoz ZeFit4 offers a battery life of 5 days which is shorter than that of 79.2% of fitness trackers and equal to that of 12.4% 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

?
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

80 mAh
MyKronoz ZeFit4 has a battery capacity of 80 mAh which is lower than that of 70.4% of fitness trackers and equal to that of 0.7% 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
MyKronoz ZeFit4 has a display. 24.1% of fitness trackers have a display.
Built-in touch 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

1.06 inch
MyKronoz ZeFit4 has a screen size of 1.06 inch which is larger than that of 51.8% of fitness trackers and equal to that of 0.7% 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

TFT LCD
MyKronoz ZeFit4 uses TFT LCD display technology which is less advanced than that of 61.4% of fitness trackers and the same as that of 5.5% 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

160 x 64
MyKronoz ZeFit4 has a screen resolution of 160x64 which is higher than that of 59.1% of fitness trackers.
official MyKronoz spec lists 160 x 64 pixels.
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

163 ppi
MyKronoz ZeFit4 has a pixel density of 163 ppi which is lower than that of 82.4% of fitness trackers and equal to that of 2% 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
MyKronoz ZeFit4 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

no
MyKronoz ZeFit4 is not designed for kids. 2.4% of fitness trackers are designed for kids.
No child-specific positioning found.
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
MyKronoz ZeFit4 has a replaceable watch band. 24.4% of fitness trackers have a replaceable watch band.
Quick-release band system.
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

MyKronoz ZeFit4 vs the average fitness tracker

  • Touchscreen
    MyKronoz ZeFit4 has a touchscreen, while the average fitness tracker does not. 43.8% of fitness trackers have a touchscreen.
    What it is: Ability of the display to recognize touch input.
    When it matters: When smooth touch response and quicker on-screen interaction matter during workouts or daily use.

    Importance: LOW

    MyKronoz ZeFit4 has a touchscreen, while the average fitness tracker does not. 43.8% of fitness trackers have a touchscreen.
  • Phone finder support
    MyKronoz ZeFit4 supports phone finding, while the average fitness tracker does not. 49.5% of fitness trackers support phone finding.
    What it is: Helps locate a connected smartphone.
    When it matters: When staying reachable from your wrist helps you avoid checking your phone constantly.

    Importance: LOW

    MyKronoz ZeFit4 supports phone finding, while the average fitness tracker does not. 49.5% of fitness trackers support phone finding.
  • Color display
    MyKronoz ZeFit4 has a color display, while the average fitness tracker does not. 37.9% of fitness trackers have a color display.
    What it is: Displays full color visuals.
    When it matters: When display technology affects contrast, color quality, power efficiency, or how premium the screen feels.

    Importance: LOW

    MyKronoz ZeFit4 has a color display, while the average fitness tracker does not. 37.9% of fitness trackers have a color display.
  • 32% lighter
    MyKronoz ZeFit4 is lighter than the average fitness tracker (17 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

    MyKronoz ZeFit4 is lighter than the average fitness tracker (17 g vs 25 g). The average fitness tracker weighs 25 g.17 g vs 25 g
  • 1.7 mm thinner design
    MyKronoz ZeFit4 is thinner than the average fitness tracker (9.3 mm vs 11 mm). The average fitness tracker has a thickness of 11 mm.
    What it is: Total depth of the watch case.
    When it matters: When overall size, thickness, or weight affects comfort during all-day wear, sleep, or exercise.

    Importance: LOW

    Good value: <10 mm

    MyKronoz ZeFit4 is thinner than the average fitness tracker (9.3 mm vs 11 mm). The average fitness tracker has a thickness of 11 mm.9.3 mm vs 11 mm
  • Camera remote control
    MyKronoz ZeFit4 supports camera remote control, while the average fitness tracker does not. 38.6% of fitness trackers support camera remote control.
    What it is: Lets the watch control the smartphone camera remotely.
    When it matters: When you want to trigger the phone camera remotely for selfies, group shots, or setup photos.

    Importance: LOW

    MyKronoz ZeFit4 supports camera remote control, while the average fitness tracker does not. 38.6% of fitness trackers support camera remote control.
  • 2.8x cheaper
    MyKronoz ZeFit4 is cheaper than the average fitness tracker (£25 vs £70).
    MyKronoz ZeFit4 is cheaper than the average fitness tracker (£25 vs £70).£25 vs £70
  • Touchscreen
    MyKronoz ZeFit4 has a touchscreen, while the average fitness tracker does not. 43.8% of fitness trackers have a touchscreen.
  • Color display
    MyKronoz ZeFit4 has a color display, while the average fitness tracker does not. 37.9% of fitness trackers have a color display.
  • Phone finder support
    MyKronoz ZeFit4 supports phone finding, while the average fitness tracker does not. 49.5% of fitness trackers support phone finding.
  • Camera remote control
    MyKronoz ZeFit4 supports camera remote control, while the average fitness tracker does not. 38.6% of fitness trackers support camera remote control.
  • 32% lighter
    MyKronoz ZeFit4 is lighter than the average fitness tracker (17 g vs 25 g). The average fitness tracker weighs 25 g.
  • 1.7 mm thinner design
    MyKronoz ZeFit4 is thinner than the average fitness tracker (9.3 mm vs 11 mm). The average fitness tracker has a thickness of 11 mm.

Total
Overall
Display
Smart Features
Design & Durability
  • No heart rate monitoring
    MyKronoz ZeFit4 does not support heart rate monitoring, while the average fitness tracker does. 60% of fitness trackers support heart rate monitoring.
  • No automatic activity detection
    MyKronoz ZeFit4 does not support automatic activity detection, while the average fitness tracker does. 50.3% of fitness trackers support automatic activity detection.
  • No pace measurement
    MyKronoz ZeFit4 does not support pace measurement, while the average fitness tracker does. 61.3% of fitness trackers support pace measurement.
  • 5 days shorter battery life
    MyKronoz ZeFit4 has a lower battery life than the average fitness tracker (5 days vs 10 days). The average fitness tracker has 10 days of battery life.
  • 27.3% smaller battery capacity
    MyKronoz ZeFit4 has a lower battery capacity than the average fitness tracker (80 mAh vs 110 mAh). The average fitness tracker has 110 mAh of battery capacity.
  • Lower screen resolution
    MyKronoz ZeFit4 has a lower screen resolution than the average fitness tracker (160x64 vs 194x368). The average fitness tracker has a screen resolution of 194x368.
    official MyKronoz spec lists 160x64 pixels.
  • 33.3% lower screen brightness
    MyKronoz ZeFit4 has a lower screen brightness than the average fitness tracker (300 nits vs 450 nits). The average fitness tracker has screen brightness of 450 nits.
  • 34% lower pixel density
    MyKronoz ZeFit4 has a lower pixel density than the average fitness tracker (163 ppi vs 247 ppi). The average fitness tracker has a pixel density of 247 ppi.
  • 5 m shorter Bluetooth range
    MyKronoz ZeFit4 has a shorter Bluetooth range than the average fitness tracker (5 m vs 10 m). The average fitness tracker offers a Bluetooth range of 10 m.
  • 49 m lower waterproof depth rating
    MyKronoz ZeFit4 has a lower waterproof depth rating than the average fitness tracker (1 m vs 50 m). The average fitness tracker has a waterproof depth rating of 50 m.
  • Limited ip rating
    MyKronoz ZeFit4 has a lower IP rating than the average fitness tracker (IP67 vs IP68). The average fitness tracker has an IP rating of IP68.
  • 4.7 mm greater height
    MyKronoz ZeFit4 is taller than the average fitness tracker (45.5 mm vs 40.8 mm). The average fitness tracker has a height of 40.8 mm.
  • 20 °C higher minimum operating temperature
    MyKronoz ZeFit4 has a higher minimum operating temperature than the average fitness tracker (20 °C vs 0 °C). The average fitness tracker supports a minimum operating temperature of 0 °C.
  • No weight tracking
    MyKronoz ZeFit4 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.
  • No BMI tracking
    MyKronoz ZeFit4 does not support BMI tracking, while the average fitness tracker does. 71% of fitness trackers support BMI tracking.
  • No achievements
    MyKronoz ZeFit4 does not support achievements, while the average fitness tracker does. 75.8% of fitness trackers support achievements.
  • No heart rate monitoring
    MyKronoz ZeFit4 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

    MyKronoz ZeFit4 does not support heart rate monitoring, while the average fitness tracker does. 60% of fitness trackers support heart rate monitoring.
  • No automatic activity detection
    MyKronoz ZeFit4 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

    MyKronoz ZeFit4 does not support automatic activity detection, while the average fitness tracker does. 50.3% of fitness trackers support automatic activity detection.
  • 5 days shorter battery life
    MyKronoz ZeFit4 has a lower battery life than the average fitness tracker (5 days vs 10 days). The average fitness tracker has 10 days of 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

    MyKronoz ZeFit4 has a lower battery life than the average fitness tracker (5 days vs 10 days). The average fitness tracker has 10 days of battery life.5 days vs 10 days
  • No pace measurement
    MyKronoz ZeFit4 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

    MyKronoz ZeFit4 does not support pace measurement, while the average fitness tracker does. 61.3% of fitness trackers support pace measurement.
  • Lower screen resolution
    MyKronoz ZeFit4 has a lower screen resolution than the average fitness tracker (160x64 vs 194x368). The average fitness tracker has a screen resolution of 194x368.
    official MyKronoz spec lists 160x64 pixels.
    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

    MyKronoz ZeFit4 has a lower screen resolution than the average fitness tracker (160x64 vs 194x368). The average fitness tracker has a screen resolution of 194x368.160x64 vs 194x368
  • 33.3% lower screen brightness
    MyKronoz ZeFit4 has a lower screen brightness than the average fitness tracker (300 nits vs 450 nits). The average fitness tracker has screen brightness of 450 nits.
    What it is: Maximum brightness output of the screen.
    When it matters: When visibility changes often between indoor, outdoor, daytime, and low-light conditions.

    Importance: HIGH

    Good value: >=450 nits

    MyKronoz ZeFit4 has a lower screen brightness than the average fitness tracker (300 nits vs 450 nits). The average fitness tracker has screen brightness of 450 nits.300 nits vs 450 nits
  • 49 m lower waterproof depth rating
    MyKronoz ZeFit4 has a lower waterproof depth rating than the average fitness tracker (1 m vs 50 m). The average fitness tracker has a waterproof depth rating of 50 m.
    What it is: Maximum depth the device can withstand underwater.
    When it matters: When you plan to swim, shower, dive, or use the tracker regularly around water.

    Importance: LOW

    Good value: >=50 m

    MyKronoz ZeFit4 has a lower waterproof depth rating than the average fitness tracker (1 m vs 50 m). The average fitness tracker has a waterproof depth rating of 50 m.1 m vs 50 m
  • No weight tracking
    MyKronoz ZeFit4 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.
    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

    MyKronoz ZeFit4 does not support weight tracking, while the average fitness tracker does. 81.3% of fitness trackers support weight tracking.
Total
Overall
Health
Sports & Navigation
Battery
Display
Connectivity
Design & Durability
App & Wellness

Graphic comparison of MyKronoz ZeFit4 and

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Third-party reviews

United Kingdom
amazon
3.0
172 Reviews
amazon
3.0
5 Reviews

(Reviews last updated: June 2026)

What customers like about MyKronoz ZeFit4?

  • Sleek and lightweight design that is comfortable to wear for long periods
  • Vibrant color touchscreen that remains readable and intuitive
  • Includes essential fitness monitoring like steps, distance, calories, and sleep tracking
  • Convenient smart notifications for calls, texts, and emails directly on the wrist
  • Magnetic charging system is easy to connect and use
  • Built-in camera remote and music control functions

What customers dislike about MyKronoz ZeFit4?

  • Frequent reports of defective batteries failing to hold a charge or dying shortly after purchase
  • Significant software instability including bugs with step counting and sleep data syncing
  • Difficulties establishing or maintaining a stable Bluetooth connection with smartphones
  • Physical build quality concerns, with some units reported to fall apart after minimal use
  • Inaccurate tracking data, particularly with step counts being described as 'optimistic' or failing entirely
  • Poor after-sales support and lack of available replacement parts like chargers

Expert reviews

M
mhealth.jmir.org
19/05/2020
Low-Cost Consumer-Based Trackers to Measure Physical Activity and Sleep Duration Among Adults in Free-Living Conditions: Validation Study

This 2020 validation study examined the concurrent validity of six consumer activity trackers costing under €50—the Geonaut On Coach, iWown i5 Plus, MyKronoz ZeFit4, Nokia GO, VeryFit 2.0, and Xiaomi MiBand 2—against research-grade standards in a 3-day free-living protocol with 20 adults. The prominent pros of these low-cost devices lie in their high affordability for public health...Read more

F
faz.net
03/04/2026
The Best Fitness Tracker | Review 04/2026 | F.A.Z. Kaufkompass

The Huawei Band 10 is rated as the top overall fitness tracker for most users due to its exceptional value, retailing between €20 and €30. The review highlights its bright 1.47-inch AMOLED display with an automatic brightness sensor, highly accurate step tracking (showing only a 3% margin of error), and a lightweight 28-gram aluminum design that is water-resistant up to 50 meters....Read more

(Translated)Show original
L
lecafedugeek.fr
05/01/2018
ZeFit4HR by MyKronoz: Do everything with your fitness tracker

The MyKronoz ZeFit4HR is a lightweight and slim fitness tracker that offers a wide range of customizable features for an affordable price of €59.90. It tracks basic metrics like steps, distance, and calories while also displaying the time, date, weather, and real-time smartphone notifications. Beyond standard tracking, the device includes unique features like continuous or on-demand...Read more

(Translated)Show original

Video reviews

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