Breathe better.
Train the cold.
A quiet iOS app for retention breathing and cold exposure. Real sessions, real body signals, no feed, no hype.
Guided breathwork
No instructions to remember. Breathe with the movement.
Cold exposure training
Choose a duration. Follow the ring until the gong.
Train. Track. Progress.
Follow guided breathing sessions
On-screen cues and gentle gongs carry you through every round.
Complete structured breath-hold rounds
Breathe out and hold; the timer counts up at your own pace.
Build your cold streak
A 7-, 14- or 28-day Cold Challenge, one crystal per day.
Earn badges, keep your privacy
Eight badges, all stored on your device. No account.
Play your way to calm
Mindful Play: five quiet experiences for focus and rest.
See what your body did
Heart rate, HRV and trends from Apple Health, with your permission.
See what changes.
Play your way to calm
Five short, quiet experiences for focus and rest. No scores running out. Ripple is free.
Free to start. Premium when you want more.
Timers, Box Breathing, the Physiological Sigh, Oxygen Reset, the Cold Guide and Ripple are free. Premium: €19.99 a year, or €29.99 lifetime access at launch price.
Download Breath U.
iPhone and iPad. No account. Your data stays with you.