HRV4Training: iPhone vs Android
HRV4Training by A.S.M.A. B.V. is on both the App Store and Google Play. Here are both versions together: downloads, users, revenue, ratings and chart positions, store by store with totals.
Health & Fitness PaidHRV4Training at a glance
AI summary written from our chart and store data, 2026-10-23. It can be wrong: check the numbers above.
HRV4Training is a scientifically validated health app that uses smartphone cameras or wearable sensors to measure Heart Rate Variability, helping athletes and fitness enthusiasts quantify stress, optimize training loads, and monitor physiological recovery. The app maintains strong visibility in the paid Health & Fitness category across diverse markets, ranking as high as #2 in Colombia and consistently within the top 10 in regions like South Africa, Spain, Italy, Mexico, Vietnam, Germany, Brazil, and Poland.
Similar apps: Elite HRV, Whoop, Garmin Connect
App Store
App details
App privacy Measured
HRV4Training’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 1 linked to your identity and 4 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
Google Play
App details
HRV4Training downloads & installs
Both stores, worldwide. Bands are open; exact numbers are free with an account.
| Store | Downloads / day | Lifetime installs |
|---|---|---|
| iPhone | – | 50k+ |
| Google Play | – | 50k+ Measured |
| Total | – | 100k+ Confidence |
How this is calculated
Where HRV4Training's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Where it ranks now
Both stores, across every country we track.
Ratings
Both stores. Store data, measured.
| Store | Rating | Ratings |
|---|---|---|
| App Store | 3.6 ★ | 289 |
| Google Play | 3.1 ★ | 1.2k 113 written reviews |
| Both stores | 3.2 ★ weighted by ratings | 1.5k |
What users say about HRV4Training
From the 53 most recent App Store reviews in the US.
Long-term users praise the app's scientific accuracy and training insights, but recent reviews are dominated by severe technical failures on newer iPhones (16/17) and broken integrations with wearables like Oura and Apple Watch. Many customers report crashes, inability to complete measurements due to camera hardware changes, and sync errors that render the paid service unusable.
Mixed (47% of recent reviews give 4–5 stars). People like it for being useful, and its features and content. The main complaints are about crashes and bugs, and price and subscriptions. Recent reviews are more negative than earlier ones.
What people like
- Useful: “Simple, Reliable, Helpful”
- Features & content: “Different readings between HRV4X tools”
- Crashes & bugs: “Very glitchy since last update”
- Design: “It does what it’s designed to do and does it well”
Common complaints
- Crashes & bugs: “Crashes Unusable w/ Latest Update”
- Price & subscription: “how do I get a refund please?”
- Updates: “Crashes Unusable w/ Latest Update”
- Connection & sync: “Did not work as expected to Sync to Oura Ring”
About HRV4Training
better balance training and lifestyle, and improve performance. HRV4Training does not require a heart rate monitor, since it can accurately assess your HRV using the phone's camera.
HRV4Training also works with Apple Watch, the Oura ring and all compatible Bluetooth SMART sensors.
HRV4Training is also the first app that goes beyond simple measurements and provides insights on:
1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.)
2) long term multi-parameter trends to look at the big picture
3) correlations between physiological measurements and annotations
4) training load analysis, fitness, fatigue, readiness to perform and injury risk
5) VO2max estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts
6) Training Polarization analysis (or 80/20)
7) Lactate Threshold Estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts
8) Weekly and monthly summaries to track progress.
All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance.
Supported devices for the camera measurement: iPhones 5, 5S, 6, 6S, 6+, 6S+, SE, 7, 7+, 8, 8+, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, 12 mini, 12, 12 Pro, 12 Pro Max, 13 mini, 13, 13 Pro, 13 Pro Max, 14, 14 Plus, 14 Max, 14 Pro, 15, 15 Max, 15 Pro, 16, 16 Max, 16 Pro
Currently unsupported devices for the camera measurement: iPhones 4S, iPads and iPods - These devices require a chest strap.
Other features:
- HRV-based advice helps you to adapt your trainings based on objective measures of recovery
- TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress
- Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or simply your phone's Camera
- Integrates with the Health app (writes heart rate, and sleep, read sleep time)
- Configurable test (single or orthostatic, choose test duration between 1, 3 or 5 minutes)
- Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz)
- Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a bluetooth SMART sensor
- HRV4T Recovery Points to provide a single, straightforward metric to analyze your physica
HRV4Training iPhone
HRV4Training is #9 in Health & Fitness Paid in Germany and charting in 27 of 30 countries we track.
Updated 25 Oct 2026 · rankings refresh through the day
24 Sep 2026
Health & Fitness PaidHRV4Training at a glance
AI summary written from our chart and store data, 2026-10-23. It can be wrong: check the numbers above.
HRV4Training is a scientifically validated health app that uses smartphone cameras or wearable sensors to measure Heart Rate Variability, helping athletes and fitness enthusiasts quantify stress, optimize training loads, and monitor physiological recovery. The app maintains strong visibility in the paid Health & Fitness category across diverse markets, ranking as high as #2 in Colombia and consistently within the top 10 in regions like South Africa, Spain, Italy, Mexico, Vietnam, Germany, Brazil, and Poland.
Similar apps: Elite HRV, Whoop, Garmin Connect
HRV4Training on the App Store
App details
App privacy Measured
HRV4Training’s App Store privacy label declares 0 data categories used to track you across other companies’ apps and websites, 1 linked to your identity and 4 collected anonymously.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
HRV4Training downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where HRV4Training's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Germany | Health & FitnessPaid | #9 |
| Italy | Health & FitnessPaid | #4 |
 United Kingdom | Health & FitnessPaid | #11 |
| United States | Health & FitnessPaid | #36 |
 France | Health & FitnessPaid | #22 |
 Australia | Health & FitnessPaid | #19 |
 Spain | Health & FitnessPaid | #13 |
| Germany | All AppsPaid | #120 |
 Canada | Health & FitnessPaid | #25 |
 South Africa | Health & FitnessPaid | #4 |
 Brazil | Health & FitnessPaid | #28 |
 Colombia | Health & FitnessPaid | #6 |
 India | Health & FitnessPaid | #41 |
 South Korea | Health & FitnessPaid | #70 |
| Italy | All AppsPaid | #135 |
 Mexico | Health & FitnessPaid | #46 |
 United Arab Emirates | Health & FitnessPaid | #28 |
 Poland | Health & FitnessPaid | #29 |
 Taiwan | Health & FitnessPaid | #56 |
 Saudi Arabia | Health & FitnessPaid | #58 |
 Argentina | Health & FitnessPaid | #23 |
 Indonesia | Health & FitnessPaid | #65 |
 Netherlands | Health & FitnessPaid | #53 |
 Philippines | Health & FitnessPaid | #33 |
| South Africa | All AppsPaid | #66 |
 Vietnam | Health & FitnessPaid | #34 |
 Turkey | Health & FitnessPaid | #61 |
 Thailand | Health & FitnessPaid | #57 |
 Sweden | Health & FitnessPaid | #66 |
 Malaysia | Health & FitnessPaid | #50 |
Apps near HRV4Training on the chart
Health & Fitness Paid, around #9.
Ratings
App Store, worldwide.
What users say about HRV4Training
From the 53 most recent App Store reviews in the US.
Long-term users praise the app's scientific accuracy and training insights, but recent reviews are dominated by severe technical failures on newer iPhones (16/17) and broken integrations with wearables like Oura and Apple Watch. Many customers report crashes, inability to complete measurements due to camera hardware changes, and sync errors that render the paid service unusable.
Mixed (47% of recent reviews give 4–5 stars). People like it for being useful, and its features and content. The main complaints are about crashes and bugs, and price and subscriptions. Recent reviews are more negative than earlier ones.
What people like
- Useful: “Simple, Reliable, Helpful”
- Features & content: “Different readings between HRV4X tools”
- Crashes & bugs: “Very glitchy since last update”
- Design: “It does what it’s designed to do and does it well”
Common complaints
- Crashes & bugs: “Crashes Unusable w/ Latest Update”
- Price & subscription: “how do I get a refund please?”
- Updates: “Crashes Unusable w/ Latest Update”
- Connection & sync: “Did not work as expected to Sync to Oura Ring”
About HRV4Training
better balance training and lifestyle, and improve performance. HRV4Training does not require a heart rate monitor, since it can accurately assess your HRV using the phone's camera.
HRV4Training also works with Apple Watch, the Oura ring and all compatible Bluetooth SMART sensors.
HRV4Training is also the first app that goes beyond simple measurements and provides insights on:
1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.)
2) long term multi-parameter trends to look at the big picture
3) correlations between physiological measurements and annotations
4) training load analysis, fitness, fatigue, readiness to perform and injury risk
5) VO2max estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts
6) Training Polarization analysis (or 80/20)
7) Lactate Threshold Estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts
8) Weekly and monthly summaries to track progress.
All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance.
Supported devices for the camera measurement: iPhones 5, 5S, 6, 6S, 6+, 6S+, SE, 7, 7+, 8, 8+, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, 12 mini, 12, 12 Pro, 12 Pro Max, 13 mini, 13, 13 Pro, 13 Pro Max, 14, 14 Plus, 14 Max, 14 Pro, 15, 15 Max, 15 Pro, 16, 16 Max, 16 Pro
Currently unsupported devices for the camera measurement: iPhones 4S, iPads and iPods - These devices require a chest strap.
Other features:
- HRV-based advice helps you to adapt your trainings based on objective measures of recovery
- TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress
- Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or simply your phone's Camera
- Integrates with the Health app (writes heart rate, and sleep, read sleep time)
- Configurable test (single or orthostatic, choose test duration between 1, 3 or 5 minutes)
- Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz)
- Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a bluetooth SMART sensor
- HRV4T Recovery Points to provide a single, straightforward metric to analyze your physica
Latest updates
More from A.S.M.A. B.V.
HRV4Training Android
Not in a tracked Google Play top chart right now.
Updated 25 Oct 2026 · rankings refresh through the day
HRV4Training on Google Play
App details
HRV4Training downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where HRV4Training's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
How this is calculated
Where it ranks on Google Play
Every top 200 chart it appears in across 23 countries.
| Country | Charts | Rank |
|---|---|---|
| Not in a Google Play top chart right now. | ||
Ratings
Google Play, worldwide.
About HRV4Training
On compatibility with your phone: the app will detect right away if your phone is supported so that you can always get a refund in case it is not.
HRV4Training in addition to our camera based measurements, supports the Oura ring, Coros watches and Bluetooth sensors (e.g. a Polar chest strap, our recommendation)
HRV4Training is also the first app that goes beyond simple measurements and provides insights on:
1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.)
2) long term multi-parameter trends to look at the big picture
3) correlations between physiological measurements and annotations
4) training load analysis, fitness, fatigue, readiness to perform and injury risk
5) VO2max estimation for runners linking the app to Strava or TrainingPeaks
6) Training Polarization analysis
7) Weekly and monthly summaries to track progress.
All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance.
Other features:
- HRV-based advice helps you to adapt your trainings based on objective measures of recovery
- TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress
- Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended)
- Configurable test (choose test duration between 1, 3 or 5 minutes)
- Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a sensor
- Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz)
- Population summaries and people like you comparisons to put your data into perspective
- Data export via email
- RR-intervals correction
- Integrates with TrainingPeaks, Strava and others
More details on HRV and app usage are available here:
http://www.hrv4training.com/quickstart-guide.html
and here: https://marcoaltini.substack.com/
HRV4Training requires to register an account with your email address, so that your data can be backed up safely and retrieved in case anything happens (app issue, changing phone, etc.).
What's new in 3.9.1
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If you find the app useful, please take a few minutes to the review it. It makes a difference. Thank you!
For any issues, contact: [email protected] - we'll do our best to help
p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.
Cheers,
Marco & Ale
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