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About this app

Welcome to O2CO2 - your personal breathing companion!

This FREE application is designed to help you relax, manage your stress, and improve your health through two well-known breathing techniques : Guided Breathing (inspired by pranayama, yoga, meditation techniques, and a method used by a world-famous instructor known for his resistance to cold) and Heart Coherence, aka Cardiac Coherence.

Our application will allow you to discover the benefits of deep breathing and oxygenating your body, as well as improve your concentration and mental clarity.

The Guided Breathing exercises in the application are easy to follow and suitable for all levels of experience, whether you are a beginner or an experienced practitioner.
This technique of deep and rapid breathing followed by a period of breath retention helps improve health, resilience to stress, ability to handle extreme temperatures, as well as providing more energy and better performance in sports.

Heart Coherence refers to a breathing technique that helps synchronize breathing with heart rate in order to promote relaxation and reduce stress.

By using our application regularly, you can :
Reduce stress and anxiety
Improve your sleep quality
Increase your energy and concentration
Strengthen your immune system
Reduce inflammations
Improve your overall well-being

So, download O2CO2 for free now and begin your breathing journey to a healthier, more balanced life !
Updated on
Jul 9, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What’s new

update libraries