What the app does inside

How the score is worked out, how the microphone listens and where the evidence stands.

How a session is scored
The number out of a hundred is a weighted average of seven separate measurements. How much weight each carries, why, and what the score doesn't tell you.
How we read the evidence
Most breathing studies are small, uncontrolled and short. What each sentence in the app rests on, and what we deliberately don't write.
How the microphone hears your breath
If audio isn't recorded, how does the app measure your breath? The noise floor, a threshold that moves with the room, and how the start and end of an exhale are found.
What your suggestions depend on
The suggested technique and the suggested length aren't fixed. Your intake answers, your past sessions, the time of day, and the places where these intersect.
How the thresholds are measured against real recordings
What counts as an "exhale" isn't decided by guesswork but from real audio samples sent by users. How that work runs.
Backgrounds, seasons and the time of day
The background changing through the day isn't decoration. How it is worked out, why it asks for no location data, and what appears when.
There is no third-party code in the app
Ad network, analytics tool, crash reporter, ready-made interface library — none of them. What that means and what it costs.
What we do with the data you share
If you turned on the anonymous session summary and audio samples, what those records come to us for, what happens to each one, and what becomes of them in the end.