# 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/mjfreediver/

## Contact
- Contact form: https://breathhold.co/contact
- Website: https://breathhold.co