About this app
Kokyu is an apnea and breath-hold training app for freediving, spearfishing, surf survival, and CO₂/O₂ table practice. Build lung capacity, improve breath-hold control, and progress with guided CO₂ and O₂ sessions tailored to your level. Train with guided CO₂ and O₂ tables, track your progress, and develop the calm and control needed for longer, more efficient breath-holds. Key Features: • Guided CO₂ and O₂ table sessions • Customizable breath-hold routines • Audio and haptic cues for hands-free training • Progress tracking and streaks • Designed for freedivers, surfers, athletes, and beginners Support: • Privacy Policy: https://docs.kubicle.studio/kokyu-privacy • Terms and Conditions: https://docs.kubicle.studio/kokyu-terms • EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Acknowledgment: • Circle Water Splash by Vecteezy.com
Latest release
What’s New
We’ve held our breath for this update - built to help you train smarter and push your limits.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 23, 2026 · 3:58 PM Free
Screenshots
