Four & Six
Four seconds in. Six seconds out. An iPhone breathing app.
Press Begin and a slow shape opens and closes with your breath, with a quiet tone at each turn. Then put the phone in your pocket — the session keeps counting and keeps sounding its cues with the screen off, and shows you where you are from the Lock Screen and the Dynamic Island.
No ads. No account. No analytics. It makes no network requests of any kind, because there is no networking code in it.
Get Four & Six on the App Store
Free on the App Store. No subscription, no in-app purchases, nothing to unlock later. iPhone, iOS 17 or later.