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O2CO2

O2CO2

Guided Breathing

1 ratings
9 reviews
💪 Health & Fitness
🏥 Medical

Archived App (Last seen on 15 Jun 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

  • Released
  • Updated
  • March 15, 2023
  • June 16, 2025

Features

Developer

Les Entrecodeurs
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⭐9
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🔄6+ apps
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❓8 answered
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About

This app offers guided breathing exercises to help you relax, manage stress, and improve focus. It features techniques inspired by yoga and meditation, designed to enhance well-being and resilience.

✓Guided Breathing exercises
✓Heart Coherence technique
✓Stress and anxiety reduction
✓Improved sleep quality
✓Increased energy and concentration
✓Enhanced immune system
Show original description

What's New in O2CO2

1.2

June 16, 2025

Libraries update

User reviews

Most RecentHighest RatedLowest Rated

Thank you!

Wish I could give six stars! Thank you for this app! Absolutely love the audio with my iPods during the guided breathing and the cardiac boxed breathing for relaxation, balanced and energizing! Amazing app!!!
SMahoney7SMahoney7

Love it

I love this app. It instantly became part of my daily routine.
Gee niGee ni

Excellent!

Would like however a bit more info on the ‘heart exercise’ …
DazMoiveDazMoive

Exploring the benefits of practicing cardiac coherence breathing for stress reduction

This app is a total game-changer! It's super easy to use and offers different breathing techniques like dynamic breathing (wim hof like breathing ) and cardiac coherence. The best part? It won't cost you a dime! Get ready to feel so relaxed and improve your well-being with this must-have app
extreme-sports.maextreme-sports.ma

Daily using

I ve switched from other paid app to o2co2. It’s easy, clear and… free!
hAppywAyhAppywAy
See 4 more reviews

FAQ

What breathing techniques does O2CO2 offer?

O2CO2 offers two primary breathing techniques: Guided Breathing, inspired by pranayama and meditation, and Heart Coherence, which synchronizes breathing with heart rate for relaxation.

Can beginners use O2CO2?

Yes, the Guided Breathing exercises are designed to be easy to follow and suitable for all levels of experience, from beginners to experienced practitioners.

What are the main benefits of using O2CO2?

Regular use of O2CO2 can help reduce stress and anxiety, improve sleep quality, increase energy and concentration, strengthen the immune system, and reduce inflammation.

Is O2CO2 free to use?

Yes, O2CO2 is a free application and does not require any payment to access its features.

Does O2CO2 have ads?

No, O2CO2 is ad-free, providing an uninterrupted experience for users focused on relaxation and well-being.

What devices is O2CO2 available on?

O2CO2 is currently supported on iPhone and iPod devices.

How often is O2CO2 updated?

The latest version of O2CO2 is 1.2, and it was last updated on June 16, 2025. Updates aim to improve functionality and user experience.

What is the age rating for O2CO2?

O2CO2 has an age rating of 4+, making it suitable for a wide range of users.