# O2 vs Box Breathing

The clearest difference is ratings volume: Box Breathing at 318 against O2's 1. Box Breathing also leads on update cadence (every 3 weeks vs every 6 weeks). O2's advantage is rating (5.0 vs 4.8) and iOS requirement (14.0 vs 16.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. O2 sells 1 one-off in-app purchase and Box Breathing sells 5 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

O2 holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Box Breathing has 318 ratings behind it against 1, so its average is the more settled of the two.

O2 ships an update every 6 weeks, Box Breathing every 3 weeks. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | O2 | Box Breathing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o2-breathing-exercises/id1528904471/reviews)** | [4.8 (318 ratings)](https://appshunter.io/ios/app/box-breathing-float/id1605558336/reviews) |
| Number of ratings | 1 | **318** |
| Positive reviews | — | 78.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1 MB | 96 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [Gootra, Inc.](https://appshunter.io/developer/1511064997) | [STRV s.r.o.](https://appshunter.io/developer/330549300) |

## What reviewers say

### O2

[App page](https://appshunter.io/ios/app/o2-breathing-exercises/id1528904471)

This app offers guided breathing exercises designed to enhance focus, reduce stress, or boost energy. Users can personalize their sessions with various themes, colors, and adjustable breath durations. It features three distinct breathing techniques to suit different needs.

**Highlights:** Focus, stress, calm, and energy exercises, Customizable themes and colors, Adjustable breath duration, Steady breathing technique, Triangle breathing technique, Box breathing technique

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $0.99 | one-time |


### Box Breathing

[App page](https://appshunter.io/ios/app/box-breathing-float/id1605558336)

Enhance your well-being with guided breathwork exercises. This app offers personalized sessions based on a breathing test, with categories for calm, sleep, focus, and energy. Experience immersive audio, haptic feedback, and sound cues for stress reduction and improved performance.

**Highlights:** Personalized breathing test, Exercise categories (Calm, Sleep, Focus, Energize), Audio guide and sound cues, Haptic feedback, CO2 tolerance test, Stress and anxiety relief

**Features:** Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Float PRO - Monthly Membership | $9.99 | per month |
| Float PRO Breathing Exercises | $39.99 | per year |
| Float PRO Breathing Exercises | $49.99 | per year |
| Float PRO Breathing Exercises | $69.99 | per year |
| Float PRO Breathing Exercises | $199.99 | one-time |


## Frequently asked questions

### Is O2 free?

O2 is free to download, with in-app purchases available.

### Is Box Breathing free?

Box Breathing is free to download, with in-app purchases available.

### Which has better reviews, O2 or Box Breathing?

O2 is rated higher. O2 averages 5.0 out of 5 from 1 ratings, while Box Breathing averages 4.8 from 318 ratings.

### Do O2 or Box Breathing have ads?

Neither O2 nor Box Breathing shows ads.

### Which is updated more often, O2 or Box Breathing?

O2 ships an update every 6 weeks, and Box Breathing every 3 weeks. Most recently, O2 was updated on October 2, 2026 and Box Breathing on October 14, 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.*