# HRV4Training vs Do Nothin.

The clearest difference is price: Do Nothin. at Free against HRV4Training's $9.99. Do Nothin. also leads on rating (5.0 vs 3.6). HRV4Training's advantage is ratings volume (290 vs 1) and chart position (#22 vs unranked). On in-app purchases and iOS requirement there is nothing between them.

Do Nothin. is free to download; HRV4Training costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Do Nothin. holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: HRV4Training has 290 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | HRV4Training | Do Nothin. |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.6 (290 ratings)](https://appshunter.io/ios/app/hrv4training/id686923970/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/do-nothin/id6758909198/reviews)** |
| Number of ratings | **290** | 1 |
| Positive reviews | 60.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 6 weeks | — |
| Monetization | Paid | **Free** |
| Best chart rank | **#22** | — |
| Size | 35 MB | 65 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [A.S.M.A. B.V.](https://appshunter.io/developer/1066843463) | [Dustin Sleva](https://appshunter.io/developer/1859715648) |

## What reviewers say

### HRV4Training

[App page](https://appshunter.io/ios/app/hrv4training/id686923970)

**Currently charting:** #22 Top Paid · Health & Fitness (US App Store)

Quantify stress, balance training and lifestyle, and improve performance with scientifically validated heart rate variability insights. This app accurately assesses HRV using your phone's camera or compatible devices, offering actionable interpretations for optimizing your training plan.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 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

**What reviewers complain about**

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

**Reported bugs**

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

**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


### Do Nothin.

[App page](https://appshunter.io/ios/app/do-nothin/id6758909198)

This app offers daily challenges and a unique camera test to help you regain focus and presence. It provides a structured 90-day roadmap to rebuild your attention span, with measurable progress tracking and a ruthless mode for dedicated users.

**Highlights:** Daily challenges for focus, 90-day roadmap for attention rebuilding, Camera test for composure and stillness, Score tracking and progress visualization, Ruthless mode for intense focus training

**In-app purchases:** none


## Frequently asked questions

### Is HRV4Training free?

HRV4Training costs $9.99, with no in-app purchases.

### Is Do Nothin. free?

Do Nothin. is free to download, with no in-app purchases.

### Which has better reviews, HRV4Training or Do Nothin.?

Do Nothin. is rated higher. HRV4Training averages 3.6 out of 5 from 290 ratings, while Do Nothin. averages 5.0 from 1 ratings.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*