# O2 vs MutLab

The clearest difference is in-app purchases: MutLab at none against O2's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. O2 sells 1 one-off in-app purchase. MutLab asks for nothing beyond the download.

O2 ships an update every 6 weeks, MutLab every 2 months. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | O2 | MutLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o2-breathing-exercises/id1528904471/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 60 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gootra, Inc.](https://appshunter.io/developer/1511064997) | [Mutlab](https://appshunter.io/developer/1363984051) |

## 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 |


### MutLab

[App page](https://appshunter.io/ios/app/mutlab/id1576343740)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O2 free?

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

### Is MutLab free?

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

### Do O2 or MutLab have ads?

Neither O2 nor MutLab shows ads.

### Which is updated more often, O2 or MutLab?

O2 ships an update every 6 weeks, and MutLab every 2 months. Most recently, O2 was updated on October 2, 2026 and MutLab on October 7, 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.*