# BreathHold

> BreathHold is an apnea and breath hold training app for iPhone and Android, with CO2 and O2 tables, guided breathing sessions, and progress tracking.

## Key Features
- CO2 tables with fixed holds and progressively shorter recovery
- O2 tables with fixed rest and progressively longer holds
- Box breathing (4-4-4-4 pattern) with visual guidance
- Rectangular breathing with custom ratios
- 4-7-8 breathing technique (Dr. Weil's method)
- Saved breath-hold tests and session history
- Instructional video tutorials
- Audio-guided sessions

## Who It's For
- Freedivers and spearfishers
- People who use dry-land breath-hold tables
- People who practise timed breathing patterns
- Anyone who wants guided breathing ratios and session timing

## Availability
- Free to install with optional in-app purchases
- Available on iPhone and Android
- Google Play displayed 1K+ downloads in July 2026

## Links
- [Website](https://breathhold.co)
- [Download (iOS)](https://apps.apple.com/us/app/breathhold-apnea-trainer/id6741862878)
- [Download (Android)](https://play.google.com/store/apps/details?id=com.breathhold.apnea.stamina.training&referrer=utm_source%3Dbreathhold-web%26utm_medium%3Dorganic_web%26utm_campaign%3Dllms%26utm_content%3Dllms%26utm_term%3Den)
- [Blog](https://breathhold.co/blog)
- [Resources](https://breathhold.co/resources)
- [Breathing Techniques](https://breathhold.co/breathing)
- [Free Tools](https://breathhold.co/tools)
- [About the author](https://breathhold.co/about)
- [Editorial methodology](https://breathhold.co/methodology)
- [Static Apnea](https://breathhold.co/resources/what-is-static-apnea)
- [CO2 vs O2 Tables](https://breathhold.co/resources/co2-table-vs-o2-table)
- [Breath-Hold Contractions](https://breathhold.co/resources/breath-hold-contractions)

## Breathing Techniques Available
- [Box Breathing](https://breathhold.co/breathing/box)
- [4-7-8 Method](https://breathhold.co/breathing/four-seven-eight)
- [Rectangular Breathing](https://breathhold.co/breathing/rectangular)

## Author
- MJ Kühn — Freediving Instructor Trainer and Functional Breath Coach, co-founder of BreathHold
- [Profile](https://breathhold.co/about)
- [Instagram](https://www.instagram.com/mj.kuhn/)

## Contact
- [Contact form](https://breathhold.co/contact)
- [Website](https://breathhold.co)