ItalianoEnglish
A circle that grows while you breathe in and shrinks while you breathe out. You follow it, and that is all.
Follow the circle: it grows as you breathe in. 
4·7·8, box, coherent, calming. 
From one to ten minutes, with the breaths counted.
Four patterns
- 4 · 7 · 8 — in for four, hold for seven, out for eight. What most people mean when they say "the breathing exercise".
- Box — four, four, four, four. For steadying rather than for sleeping.
- Coherent — five and a half seconds each way, no holds: about five and a half breaths a minute.
- Calming — in for four, out for six. Longer out than in.
Sessions from one to ten minutes, with the breaths counted. A short buzz at each turn of the breath, so it can be followed with the eyes shut; the screen stays on while a session is going.
A sound bed the app composes for itself
Six long notes of a minor pentatonic over a low A, started at drifting intervals and left to overlap: it is not a loop going round, and two minutes never sound like the two minutes before. Under them a drone holds the room; over them two bells, one as the inhale begins and one as the exhale begins — never during the holds, which are the part of a breath where nothing should happen.
There is no audio file in the package: all of it is arithmetic, worked out while the app starts. Whatever you were already listening to is not stopped — it is turned down, and comes back up when the session ends. The silence switch is next to the start button, and it starts on.
The circle has no animation of its own
Its radius is how full the lungs are according to the pattern, computed from the elapsed time: there is no second opinion about where the breath is, and that is why following it with a body works. The curve is a raised cosine rather than a straight line, because a breath that changes speed abruptly at each end cannot be followed — and the point of the circle is that it can be followed without thinking.
Not a medical device
Breathe gives no medical advice. It is a circle on a schedule: what it is worth is what following it is worth, and that is between you and whoever taught you the pattern. The line is on the screen, not only here.
Your data stays yours
Breathe asks for no permissions at all and collects nothing: the pattern and the length stay on the phone. No account, no servers, and the network is needed only for the ads.
How it is paid for
One banner anchored at the bottom, and that is all: no ads during a session, no subscription, no pattern held hostage.