# HRV4Training

> Heart Rate Variability (HRV) insights for stress, training, and performance optimization. (iPhone/iPad app by A.S.M.A. B.V..)

- Source: https://appshunter.io/ios/app/hrv4training/id686923970 (this page in markdown: same URL + `.md`)
- Developer: [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463)
- Category: Health & Fitness, Sports
- Price: $9.99
- Rating: 3.60/5 from 288 App Store ratings · 449 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 35 MB
- Languages: American English, European Spanish, Italian
- Released: 2013-08-14
- Data updated: 2026-08-30
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hrv4training/id686923970/reviews.md

## What is HRV4Training?

The first scientifically validated Heart Rate Variability (HRV) app. HRV4Training provides HRV based insights to help you quantify stress,
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 physical condition
- Population summaries and people like you comparisons to put your data into perspective
- Analysis of compliance and consistency 
- Data export via email or Dropbox
- Integrates with TrainingPeaks, Oura, Strava and Coros

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.).

HRV4Training does not provide medical advice. It is intended for informational purposes only. Consult a medical professional before making health or lifestyle decisions.

Please find an overview of the relevant scientific literature in our guide, here: https://marcoaltini.substack.com/p/the-ultimate-guide-to-heart-rate

## Key features

- HRV-based stress quantification
- Training and lifestyle balance
- Performance improvement insights
- Camera-based HRV assessment
- Integration with wearables
- Training load analysis
- VO2max and Lactate Threshold estimation

## Chart rankings

- #23 in Top Paid · Health & Fitness (US App Store)

## What do users think of HRV4Training?

Overall sentiment: neutral

**Pros**

- 👍 Accurate HRV measurements
- 🚀 Straightforward and easy to use
- 💡 Provides valuable insights for training and recovery
- 👍 Integrates well with other fitness apps
- 👍 Responsive and helpful developer support

**Cons**

- 🐛 Inconsistent readings and technical issues
- 🔒 Requires user account and data sharing
- 🔒 Concerns about data privacy
- 🔋 Drains battery when using camera for measurements

**Commonly reported bugs**

- App crashes frequently, especially with iOS updates
- Syncing issues with Strava, TrainingPeaks, and Apple Health
- Camera-based measurements often unreliable or inconsistent

**Most requested features**

- Allow multiple measurements per day
- Improve integration with Apple Watch and other wearables
- Add more customization options and data visualization
- Expand support for non-athletic use cases

## Recent user reviews (10 of 449)

All indexed reviews: https://appshunter.io/ios/app/hrv4training/id686923970/reviews.md

### 4/5 — No metric option

*2026-08-04, version 8.6.3*

An app that aspires to be a benchmark for HRV testing apps and not offering an option for metric distances and weight is disappointing and cheap. It’s only the US that is behind everyone else, after all!

### 5/5 — Health

*2026-06-16, version 8.6.3*

I take the Hrv 4 training measurement daily to monitor health status.  I appreciate the feedback with the results and guidance regarding the intensity for the day

### 1/5 — Asking for a refund right now

*2026-06-10*

Apps is hard to use, even linking with apple watch, this is probably fitting foe someone who loves to take a manual measurement everyday at the same time, someone who is deep into this sort of metrics, but for someone like they are probably better off with something else rather an apps on a phone, in short too complex and manual for an everyday person and fall way short for a pro

### 3/5 — VERY GOOD

*2026-06-09, version 8.6.3*

It would be great if the app could send a notification every morning, im struggling with my consistence because some mornings i forget to use it.

### 3/5 — How to do measurements with newer cameras??! BUYER BEWARE: glitchy

*2026-06-02, version 8.6.3*

Cool idea but the camera measurement thing seems to work quite poorly with my newer model iPhone. It’s nearly impossible to keep BOTH lenses plus the flash covered for the duration. I would not have purchased the app had I known. Any tips now that the cats out of the bag for this sucker

### 5/5 — The Gold standard

*2026-05-26, version 8.6.3*

Marco’s HRV app and academic research are leading the field for many years now. The app is easy to use and set up and my daily companion. I can only recommend it.

### 3/5 — Too expensive and bait and switchy

*2026-04-30, version 8.6.0*

The interface is mid. I was fine paying the 10 bucks for the app but not disclosed in the purchase is you have to pay another 50 bucks every year just to sync to TrainingPeaks! that’s absurd and total rip off.

### 1/5 — WORST UI / UX & Api

*2026-04-27*

Garbage

### 3/5 — 登陆界面一直闪退，

*2026-03-29*

评论区也有一样的经历，感觉你们根本没有做优化

### 2/5 — Not worth the effort to install

*2026-03-27, version 8.6.0*

Only successful tested once for only one minute. Never again it always stop before completing one minute testing. Waste money and time. Apple should refund me for selling me a product that does not work.

## Frequently asked questions about HRV4Training

### What does HRV4Training do?

HRV4Training provides scientifically validated Heart Rate Variability (HRV) insights to help you quantify stress, better balance your training and lifestyle, and improve your performance. It offers actionable interpretations of your physiological data to optimize your training plan.

### How does HRV4Training measure Heart Rate Variability?

HRV4Training can accurately assess your HRV using your phone's camera, eliminating the need for a separate heart rate monitor. It also works with compatible devices like Apple Watch, the Oura ring, and all Bluetooth SMART sensors.

### What kind of insights does HRV4Training provide?

The app offers insights into day-to-day HRV changes in response to stressors, long-term multi-parameter trends, correlations between physiological measurements and annotations, training load analysis, fitness, fatigue, readiness to perform, and injury risk. It can also estimate VO2max and Lactate Threshold for runners.

### Is HRV4Training compatible with my device?

HRV4Training supports a wide range of iPhones for camera-based measurements. However, older devices like iPhone 4S, iPads, and iPods require a chest strap. The app also integrates with the Health app and works with various Bluetooth SMART heart rate monitors.

### What is the cost of HRV4Training?

Based on the provided information, HRV4Training is a paid application. It does not have in-app purchases or advertisements.

## Version history (last 5 releases)

### 8.6.4 — 2026-08-22

Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com

---

If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks!

For any issues, or quick questions contact: hello@HRV4Training.com  

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Cheers, 
Marco & Ale

### 8.6.3 — 2026-05-25

Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com

---

If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks!

For any issues, or quick questions contact: hello@HRV4Training.com  

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Cheers, 
Marco & Ale

### 8.6.0 — 2026-02-28

Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com

---

If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks!

For any issues, or quick questions contact: hello@HRV4Training.com  

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Cheers, 
Marco & Ale

### 8.5.9 — 2025-12-20

Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com

---

If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks!

For any issues, or quick questions contact: hello@HRV4Training.com  

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Cheers, 
Marco & Ale

### 8.5.8 — 2025-10-29

Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com

---

If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks!

For any issues, or quick questions contact: hello@HRV4Training.com  

p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free.

Cheers, 
Marco & Ale

## Apps similar to HRV4Training

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Athlytic: Fitness & Recovery](https://appshunter.io/ios/app/athlytic-fitness-and-recovery/id1543571755) | 4.8 (10,893) | Free | Health & Fitness |
| [Pulsebit: Heart Rate Monitor](https://appshunter.io/ios/app/pulsebit-heart-rate-monitor/id1581114201) | 4.5 (22,440) | Free | Health & Fitness |
| [Hearty : Heart Rate,Stress, BP](https://appshunter.io/ios/app/hearty-heart-ratestress-bp/id1490743162) | 4.5 (7,532) | Free | Health & Fitness |
| [CardioBot: Heart Rate Monitor](https://appshunter.io/ios/app/cardiobot-heart-rate-monitor/id1149412984) | 4.5 (10,078) | Free | Health & Fitness |
| [Welltory: Stress & Heart Rate](https://appshunter.io/ios/app/welltory-stress-and-heart-rate/id1074367771) | 4.7 (131,900) | Free | Health & Fitness |
| [Camera Heart Rate Variability](https://appshunter.io/ios/app/camera-heart-rate-variability/id788460316) | 2.8 (8) | $6.99 | Health & Fitness |

## More apps by A.S.M.A. B.V.

- [Heart Rate Variability Logger](https://appshunter.io/ios/app/heart-rate-variability-logger/id683984776)
- [Camera Heart Rate Variability](https://appshunter.io/ios/app/camera-heart-rate-variability/id788460316)
- [HRV4Biofeedback](https://appshunter.io/ios/app/hrv4biofeedback/id1504638613)

All apps by A.S.M.A. B.V.: https://appshunter.io/developer/1066843463

## Related topics

[hrv4training](https://appshunter.io/ios/topics/hrv4training) · [hrv training](https://appshunter.io/ios/topics/hrv-training)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-30.*