# O2 - Breathing exercises — Just breathe

> Guided breathing exercises for focus, stress relief, calm, and energy. (iPhone/iPad app by Gootra, Inc..)

- Source: https://appshunter.io/ios/app/o2-breathing-exercises/id1528904471 (this page in markdown: same URL + `.md`)
- Developer: [Gootra, Inc.](https://appshunter.io/developer/1511064997)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 14.0 · 1 MB
- Languages: English
- Released: 2020-09-20
- Data updated: 2026-07-05
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/o2-breathing-exercises/id1528904471/reviews.md

## What is O2?

Beautiful breathing exercises for focus, stress, calm or energy.

Customize your experience with different themes and colors. Change the breath duration and choose from 3 different exercises:
- Steady breathing: in-and-out breathing 
- Triangle breathing: inhale, hold, exhale
- Box breathing: inhale, hold, exhale, hold

## Key features

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Frequently asked questions about O2

### What types of breathing exercises does O2 offer?

O2 provides three main breathing techniques: steady breathing (in-and-out), triangle breathing (inhale, hold, exhale), and box breathing (inhale, hold, exhale, hold). These are designed for focus, stress relief, calm, and energy.

### Can I customize the breathing sessions in O2?

Yes, you can customize your experience with different themes and colors. Additionally, the breath duration can be adjusted to suit your preferences.

### Is O2 free to use?

O2 is free to download and use. It offers in-app purchases for additional customization or features, but the core breathing exercises are accessible without cost.

### What devices is O2 compatible with?

O2 is available on iPhone, iPad, and iPod devices. It is designed for iOS users looking for accessible breathing exercises.

### How often is O2 updated?

The latest version of O2 is 1.2, which was released on December 15, 2020. While the last update was in late 2020, the app's core functionality remains stable for its intended purpose.

### What is the age rating for O2?

O2 has an age rating of 4+, making it suitable for a wide range of users, including children and adults, to practice breathing exercises.

### Does O2 have ads?

No, O2 does not contain advertisements. This ensures an uninterrupted and focused breathing experience for users.

### What do users like about O2?

Based on its rating of 5.0 stars from 1 review, users likely appreciate the simplicity and effectiveness of the guided breathing exercises. The customization options also contribute to a positive user experience.

## Version history (last 3 releases)

### 1.2 — 2020-12-15

Added support for iPad!

### 1.0.1 — 2020-10-23

Bug fixes and improvements

### 1.0 — 2020-09-20

No release notes.

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## More apps by Gootra, Inc.

- [Carpe \| Daily Habit To-do List](https://appshunter.io/ios/app/carpe-daily-habit-to-do-list/id1511064998)
- [Diem \| The Daily Photo Journal](https://appshunter.io/ios/app/diem-the-daily-photo-journal/id1511065007)
- [% Calc - Percentage Calculator](https://appshunter.io/ios/app/calc-percentage-calculator/id1527961266)

All apps by Gootra, Inc.: https://appshunter.io/developer/1511064997

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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 2026-07-05.*