# CapnoTrainer vs ButeykoClinic®

The clearest difference is update cadence: CapnoTrainer at every 3 weeks against ButeykoClinic®'s every 5 months. CapnoTrainer also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CapnoTrainer ships an update every 3 weeks, ButeykoClinic® every 5 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | CapnoTrainer | ButeykoClinic® |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/buteykoclinic/id6478960199/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | — | Free |
| Size | 54 MB | 61 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Muhammad Arshad Khan](https://appshunter.io/developer/1617354083) | [Oxygen Research Institute Ltd.](https://appshunter.io/developer/1589260952) |

## What reviewers say

### CapnoTrainer

[App page](https://appshunter.io/ios/app/capnotrainer/id1617354081)

**Features:** macOS Compatibility

**In-app purchases:** none


### ButeykoClinic®

[App page](https://appshunter.io/ios/app/buteykoclinic/id6478960199)

Learn a physician-developed breathing program to enhance immunity, reduce stress, and improve sleep and overall health for adults and children. Access guided exercises, track progress, and test your breathing capacity.

**Highlights:** Video program for children and teens, Guided breathing and relaxation for adults, Control Pause breathing test, Progress tracking, Links to resources, Find an instructor

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CapnoTrainer free?

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

### Is ButeykoClinic® free?

ButeykoClinic® is free to download, with no in-app purchases.

### Do CapnoTrainer or ButeykoClinic® have ads?

Neither CapnoTrainer nor ButeykoClinic® shows ads.

### Which is updated more often, CapnoTrainer or ButeykoClinic®?

CapnoTrainer ships an update every 3 weeks, and ButeykoClinic® every 5 months. Most recently, CapnoTrainer was updated on October 25, 2026 and ButeykoClinic® on October 24, 2026.

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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.*