OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Fitness trackers Methodology v1.0
Fitness trackers Methodology v1.0
Mathematical & Unbiased Scoring
Products in this category are evaluated mathematically under Frontumo Fitness trackers Methodology v1.0 using verified laboratory benchmarks, technical specifications, and authentic consumer ratings with 0% commercial bias.
Explore Fitness trackers Methodology v1.0

MyKronoz ZeFit4 HR Review | 171 Data compared

Avg. price:~£20Battery life:5 daysScreen size:1.06 inchHeart rate monitor:yesGPS:noWaterproof depth rating:?

MyKronoz ZeFit4 HR Review: Compare 171 technical specifications and user reviews to see how this product ranks in the Fitness trackers category and whether it is worth buying.

6.6

Overall score

Score
6.6/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 68% of models
Score components

80%

6.8

Technical score

20%

5.8

User score

â–¼Worse than 68% of fitness-trackers
6.8

Technical score

Technical score
6.8/ 10
✕
What it is
An assessment of technical performance for products in the Fitness trackers category across these key areas: Health, Sports & Navigation, Smart Features, App & Wellness, Connectivity, Battery, Display, Design & Durability.
When it matters
When you want to compare fitness trackers based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 59% of models
Score components

20%

7.6

Sports & Navigation

20%

4.2

Battery

18%

7.2

Health

18%

6.8

Display

8%

7.8

Smart Features

8%

7.8

App & Wellness

4%

7.2

Connectivity

4%

8.3

Design & Durability

â–¼Worse than 59% of fitness-trackers
5.8

User score

User score
5.8/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 95% of models
Score components

70%

6.1

User ratings

30%

5.3

Number of reviews

Based on 95 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–¼Worse than 95% of fitness-trackers
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Best prices

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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.
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Technical Specifications of fitness tracker MyKronoz ZeFit4 HR

Technical score
Technical score
6.8/ 10
✕
What it is
An assessment of technical performance for products in the Fitness trackers category across these key areas: Health, Sports & Navigation, Smart Features, App & Wellness, Connectivity, Battery, Display, Design & Durability.
When it matters
When you want to compare fitness trackers based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 59% of models
Score components:

20%

7.6

Sports & Navigation

20%

4.2

Battery

18%

7.2

Health

18%

6.8

Display

8%

7.8

Smart Features

8%

7.8

App & Wellness

4%

7.2

Connectivity

4%

8.3

Design & Durability

6.8
User score
User score
5.8/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 95% of models
Score components

70%

6.1

User ratings

30%

5.3

Number of reviews

Based on 95 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
5.8
Popularity
Popularity
5.3/ 10
✕
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.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 53% of models
Popularity:
MyKronoz ZeFit4 HR has a popularity score of 5.3 points, which is higher than 52.6% of fitness trackers.
5.3
Value for money
Value for money
7.6/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 69% of models
Score components:

60%

6.6

Overall score

40%

10

Price

7.6
Heart rate monitor
yes
Heart rate monitor
yes
â–² Better than 40% of models
This fitness tracker supports heart rate monitoring. 40.2% of fitness trackers support heart rate monitoring.
Resting heart rate
no
Resting heart rate
no
â–¼ Worse than 48% of models
This fitness tracker does not support Resting heart rate. 47.9% of fitness trackers support Resting heart rate.
Fast/slow heart rate alerts
yes
Fast/slow heart rate alerts
yes
â–² Better than 66% of models
This fitness tracker supports high and low heart rate alerts. 65.8% of fitness trackers support high and low heart rate alerts.
High heart rate alert only.
Irregular heart rate alerts
no
Irregular heart rate alerts
no
â–¼ Worse than 12% of models
This fitness tracker does not support irregular heart rate alerts. 12.4% of fitness trackers support irregular heart rate alerts.
Blood oxygen sensor
no
Blood oxygen sensor
no
â–¼ Worse than 25% of models
This fitness tracker does not have a blood oxygen sensor. 25.4% of fitness trackers have a blood oxygen sensor.
Show more
GPS
no
GPS
no
â–¼ Worse than 11% of models
This fitness tracker does not have GPS. 11% of fitness trackers have GPS.
Satellite systems supported
no
Satellite systems supported
no
â–¼ Worse than 12% of models
This fitness tracker 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
no
GNSS bands supported
no
â–¼ Worse than 9% of models
This fitness tracker does not support advanced GNSS bands. 8.9% of fitness trackers support advanced GNSS bands.
Galileo support
no
Galileo support
no
â–¼ Worse than 5% of models
This fitness tracker does not support Galileo. 4.9% of fitness trackers support Galileo.
Acquires GPS faster
no
Acquires GPS faster
no
â–¼ Worse than 8% of models
This fitness tracker does not support faster GPS acquisition. 8.1% of fitness trackers support faster GPS acquisition.
Show more
Notifications
yes
Notifications
yes
â–² Better than 28% of models
This fitness tracker supports notifications. 27.5% of fitness trackers support notifications.
Vibrating alerts
yes
Vibrating alerts
yes
â–² Better than 16% of models
This fitness tracker supports vibration alerts. 16.3% of fitness trackers support vibration alerts.
Call control
no
Call control
no
â–¼ Worse than 42% of models
This fitness tracker does not support call controls. 41.8% of fitness trackers support call controls.
Call answering
no
Call answering
no
â–¼ Worse than 1% of models
This fitness tracker does not support call answering. 1% of fitness trackers support call answering.
Calendar sync
no
Calendar sync
no
â–¼ Worse than 20% of models
This fitness tracker does not support calendar sync. 20.3% of fitness trackers support calendar sync.
Show more
Activity reports
yes
Activity reports
yes
â–² Better than 6% of models
This fitness tracker supports activity reports. 5.7% of fitness trackers support activity reports.
Goal setting
yes
Goal setting
yes
â–² Better than 2% of models
This fitness tracker supports goal setting. 2.4% of fitness trackers support goal setting.
Achievements
no
Achievements
no
â–¼ Worse than 76% of models
This fitness tracker does not support achievements. 76.2% of fitness trackers support achievements.
Inactivity alerts
yes
Inactivity alerts
yes
â–² Better than 24% of models
This fitness tracker supports inactivity alerts. 23.5% of fitness trackers support inactivity alerts.
Coaching
no
Coaching
no
â–¼ Worse than 34% of models
This fitness tracker does not support coaching. 34% of fitness trackers support coaching.
Show more
Bluetooth version
4
Bluetooth version
4
â–¼ Worse than 44% of models
This fitness tracker supports Bluetooth 4 which is newer than in 5.1% of fitness trackers and equal to that in 51.3% of fitness trackers.
Maximum Bluetooth range
5 m
Maximum Bluetooth range
5 m
â–¼ Worse than 96% of models
Market range: <8 m – >23 m
This fitness tracker offers a Bluetooth range of 5 m which is lower than that of 95.5% of fitness trackers and equal to that of 3.7% of fitness trackers.
NFC
no
NFC
no
â–¼ Worse than 13% of models
This fitness tracker does not have NFC. 13% of fitness trackers have NFC.
Wi-Fi connectivity
?
Wi-Fi version
no
Wi-Fi version
no
â–¼ Worse than 1% of models
This fitness tracker does not support modern Wi-Fi. 1% of fitness trackers support modern Wi-Fi.
no Wi-Fi support.
Show more
Battery life
5 days
Battery life
5 days
â–¼ Worse than 79% of models
Market range: <5 days – >180 days
This fitness tracker 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
N/A
Battery life in training mode
?
Battery life in power-saving mode
?
Battery capacity
80 mAh
Battery capacity
80 mAh
â–¼ Worse than 73% of models
Market range: <30 mAh – >225 mAh
This fitness tracker has a battery capacity of 80 mAh which is lower than that of 73% of fitness trackers and equal to that of 0.7% of fitness trackers.
Show more
Display
yes
Display
yes
â–² Better than 24% of models
This fitness tracker has a display. 24.1% of fitness trackers have a display.
Screen size
1.06 inch
Screen size
1.06 inch
â–² Better than 52% of models
Market range: <0 inch – >1.6 inch
This fitness tracker 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
TFT LCD
Display type
TFT LCD
â–¼ Worse than 62% of models
This fitness tracker uses TFT LCD display technology which is less advanced than that of 62.1% of fitness trackers and the same as that of 5.6% of fitness trackers.
Screen resolution
128x 80
Screen resolution
128x 80
â–² Better than 57% of models
This fitness tracker has a screen resolution of 128x80 which is higher than that of 57.4% of fitness trackers and equal to that of 1.1% of fitness trackers.
Pixel density
163 ppi
Pixel density
163 ppi
â–¼ Worse than 81% of models
Market range: <140 ppi – >330 ppi
This fitness tracker has a pixel density of 163 ppi which is lower than that of 80.6% of fitness trackers and equal to that of 1.9% of fitness trackers.
Show more
Form factor
watch
Hybrid design
no
Hybrid design
no
â–¼ Worse than 2% of models
This fitness tracker does not support Hybrid design. 2.4% of fitness trackers support Hybrid design.
Designed for kids
no
Designed for kids
no
â–¼ Worse than 2% of models
This fitness tracker is not designed for kids. 2.4% of fitness trackers are designed for kids.
Replaceable watch band
yes
Replaceable watch band
yes
â–² Better than 26% of models
This fitness tracker has a replaceable watch band. 25.6% of fitness trackers have a replaceable watch band.
Quick-release band system.
Band width
16 mm
Show more

MyKronoz ZeFit4 HR vs the average fitness tracker

246810TotalHealthSports & NavigationBatteryDisplayConnectivitySmart FeaturesDesign & DurabilityApp & Wellness
  • Touchscreen
    Touchscreen
    yes
    â–² Better than 56% of models
    This fitness tracker has a touchscreen, while the average fitness tracker does not. 43.8% of fitness trackers have a touchscreen.
  • Heart rate alerts
    Fast/slow heart rate alerts
    yes
    â–² Better than 66% of models
    This fitness tracker supports high and low heart rate alerts, while the average fitness tracker does not. 34.5% of fitness trackers support high and low heart rate alerts.
    High heart rate alert only.
  • Phone finder support
    Find my phone
    yes
    â–² Better than 51% of models
    This fitness tracker supports phone finding, while the average fitness tracker does not. 49.3% of fitness trackers support phone finding.
  • Color display
    Color display
    yes
    â–² Better than 63% of models
    This fitness tracker has a color display, while the average fitness tracker does not. 37.7% of fitness trackers have a color display.
  • Branded damage-resistant glass
    Has branded damage-resistant glass
    yes
    â–² Better than 78% of models
    This fitness tracker 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.
  • 32% lighter
    Thickness
    17 g mm
    â–² Better than 80% of models
    Market range: <8 mm – >13 mm
    This fitness tracker is lighter than the average fitness tracker (17 g vs 25 g). The average fitness tracker weighs 25 g.
    17 g vs 25 g
  • 3.5x cheaper
    MyKronoz ZeFit4 HR is cheaper than the average fitness tracker (£20 vs £70).
    £20 vs £70
  • Camera remote control
    Camera remote control
    yes
    â–² Better than 61% of models
    This fitness tracker supports camera remote control, while the average fitness tracker does not. 38.9% of fitness trackers support camera remote control.
  • 3.5x cheaper
    MyKronoz ZeFit4 HR is cheaper than the average fitness tracker (£20 vs £70).
    £20 vs £70
  • Heart rate alerts
    Fast/slow heart rate alerts
    yes
    â–² Better than 66% of models
    This fitness tracker supports high and low heart rate alerts, while the average fitness tracker does not. 34.5% of fitness trackers support high and low heart rate alerts.
    High heart rate alert only.
  • Touchscreen
    Touchscreen
    yes
    â–² Better than 56% of models
    This fitness tracker has a touchscreen, while the average fitness tracker does not. 43.8% of fitness trackers have a touchscreen.
  • Color display
    Color display
    yes
    â–² Better than 63% of models
    This fitness tracker has a color display, while the average fitness tracker does not. 37.7% of fitness trackers have a color display.
  • Branded damage-resistant glass
    Has branded damage-resistant glass
    yes
    â–² Better than 78% of models
    This fitness tracker 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.
  • Phone finder support
    Find my phone
    yes
    â–² Better than 51% of models
    This fitness tracker supports phone finding, while the average fitness tracker does not. 49.3% of fitness trackers support phone finding.
  • Camera remote control
    Camera remote control
    yes
    â–² Better than 61% of models
    This fitness tracker supports camera remote control, while the average fitness tracker does not. 38.9% of fitness trackers support camera remote control.
  • 32% lighter
    Thickness
    17 g mm
    â–² Better than 80% of models
    Market range: <8 mm – >13 mm
    This fitness tracker is lighter than the average fitness tracker (17 g vs 25 g). The average fitness tracker weighs 25 g.
    17 g vs 25 g
  • 1.2 mm thinner design
    Thickness
    9.8 mm
    â–² Better than 80% of models
    Market range: <8 mm – >13 mm
    This fitness tracker is thinner than the average fitness tracker (9.8 mm vs 11 mm). The average fitness tracker has a thickness of 11 mm.
    9.8 mm vs 11 mm
  • 5 days shorter battery life
    Battery life
    5 days
    â–¼ Worse than 79% of models
    Market range: <5 days – >180 days
    This fitness tracker 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
    Measures pace
    no
    â–¼ Worse than 62% of models
    This fitness tracker does not support pace measurement, while the average fitness tracker does. 61.7% of fitness trackers support pace measurement.
  • Lower screen resolution
    Screen resolution
    128 x 80
    â–² Better than 57% of models
    This fitness tracker has a lower screen resolution than the average fitness tracker (128x80 vs 194x368). The average fitness tracker has a screen resolution of 194x368.
    128x80 vs 194x368
  • No weight tracking
    Weight tracking
    no
    â–¼ Worse than 81% of models
    This fitness tracker does not support weight tracking, while the average fitness tracker does. 81% of fitness trackers support weight tracking.
  • 33.5% lower pixel density
    Pixel density
    163 ppi
    â–¼ Worse than 81% of models
    Market range: <140 ppi – >330 ppi
    This fitness tracker has a lower pixel density than the average fitness tracker (163 ppi vs 245 ppi). The average fitness tracker has a pixel density of 245 ppi.
    163 ppi vs 245 ppi
  • Limited ip rating
    IP rating
    IP67
    â–¼ Worse than 61% of models
    This fitness tracker has a lower IP rating than the average fitness tracker (IP67 vs IP68). The average fitness tracker has an IP rating of IP68.
    IP67 vs IP68
  • 27.3% smaller battery capacity
    Battery capacity
    80 mAh
    â–¼ Worse than 73% of models
    Market range: <30 mAh – >225 mAh
    This fitness tracker 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.
    80 mAh vs 110 mAh
  • No BMI tracking
    BMI tracking
    no
    â–¼ Worse than 71% of models
    This fitness tracker does not support BMI tracking, while the average fitness tracker does. 71% of fitness trackers support BMI tracking.
  • 36.8% lower user score
    User score
    5.8/ 10
    ✕
    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 distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    MyKronoz ZeFit4 HR
    the average fitness tracker
    MyKronoz ZeFit4 HR has a lower user score than the average fitness tracker (5.85 vs 8.000).
    5.85 vs 8
  • 4.1% worse value for money
    MyKronoz ZeFit4 HR has a lower value-for-money score than the average fitness tracker (7.61 vs 7.9).
    7.61 vs 7.92
  • 5 days shorter battery life
    Battery life
    5 days
    â–¼ Worse than 79% of models
    Market range: <5 days – >180 days
    This fitness tracker 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
  • 27.3% smaller battery capacity
    Battery capacity
    80 mAh
    â–¼ Worse than 73% of models
    Market range: <30 mAh – >225 mAh
    This fitness tracker 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.
    80 mAh vs 110 mAh
  • Lower screen resolution
    Screen resolution
    128 x 80
    â–² Better than 57% of models
    This fitness tracker has a lower screen resolution than the average fitness tracker (128x80 vs 194x368). The average fitness tracker has a screen resolution of 194x368.
    128x80 vs 194x368
  • 33.5% lower pixel density
    Pixel density
    163 ppi
    â–¼ Worse than 81% of models
    Market range: <140 ppi – >330 ppi
    This fitness tracker has a lower pixel density than the average fitness tracker (163 ppi vs 245 ppi). The average fitness tracker has a pixel density of 245 ppi.
    163 ppi vs 245 ppi
  • 5 m shorter Bluetooth range
    Maximum Bluetooth range
    5 m
    â–¼ Worse than 96% of models
    Market range: <8 m – >23 m
    This fitness tracker 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.
    5 m vs 10 m
  • Limited ip rating
    IP rating
    IP67
    â–¼ Worse than 61% of models
    This fitness tracker has a lower IP rating than the average fitness tracker (IP67 vs IP68). The average fitness tracker has an IP rating of IP68.
    IP67 vs IP68
  • 4.7 mm greater height
    Height
    45.5 mm
    â–¼ Worse than 77% of models
    Market range: <10 mm – >50 mm
    This fitness tracker 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.
    45.5 mm vs 40.8 mm
  • 20 °C higher minimum operating temperature
    Min operating temperature
    -20 °C
    â–² Better than 85% of models
    Market range: <-20 °C – >5 °C
    This fitness tracker 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.
    -20 °C vs 0 °C
  • No weight tracking
    Weight tracking
    no
    â–¼ Worse than 81% of models
    This fitness tracker does not support weight tracking, while the average fitness tracker does. 81% of fitness trackers support weight tracking.
  • No BMI tracking
    BMI tracking
    no
    â–¼ Worse than 71% of models
    This fitness tracker does not support BMI tracking, while the average fitness tracker does. 71% of fitness trackers support BMI tracking.
  • No achievements
    Achievements
    no
    â–¼ Worse than 76% of models
    This fitness tracker does not support achievements, while the average fitness tracker does. 75.8% of fitness trackers support achievements.

Video reviews

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

Expert reviews

In-depth analysis and verdict from leading tech publications

A
activegearreview.com
15/01/2018
Summary of the review
MyKronoz ZeTime Review (Includes hardware comparison to ZeFit 3/4 HR series)
H
heise.de
04/04/2026
Summary of the review
Top 10: The Best Fitness Trackers Tested – Great Heart Rate Monitors Under 100 Euros
(Translated)Show original

Third-party reviews

Based on 95 buyer reviews from online shops.
Reviews last updated: June 2026 · How we calculate this
Read buyer reviews on Amazon →

What we like about MyKronoz ZeFit4 HR

  • Comfortable to wear for long periods
  • Easy to charge using a magnetic connection or wireless charging support
  • Vibrant and readable color touchscreen with intuitive navigation
  • Comprehensive feature set including heart rate, steps, and sleep tracking
  • Useful smart features like remote camera/music control and find my phone
  • Good compatibility with Android, iOS, and even Windows platforms

What we don't like about MyKronoz ZeFit4 HR

  • Reports of poor build quality, with some units falling apart
  • Inconsistent battery performance; some users reported it failing shortly after charging
  • Unreliable step counting and heart rate accuracy for some users
  • The wristband can be too small for larger hands
  • Software issues including incorrect clock/date synchronization that cannot be manually fixed
  • Charging cradle can be impractical for travel

Verdict

The MyKronoz ZeFit4 HR is a lightweight (17g) fitness tracker featuring a 1.06-inch TFT color touchscreen (160x64 pixels) and a 3-axis accelerometer for tracking steps, distance, calories, and sleep. Its main characteristics include an integrated optical heart rate sensor for real-time monitoring, IP67 water resistance, and an 80mAh battery providing up to 5 days of standby time on a 1.5-hour charge. Key pros include its slim 9.3mm design, aluminum frame, and smart features like inactivity alerts, remote camera/music control, and notifications for calls, emails, and social media. However, some users have noted cons such as the limited 7-day on-device activity memory and a relatively low display resolution compared to newer competitors.

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