It reads your breath.
Nothing on your body.
Prop the phone on the table, close your eyes, and sit. When the bell rings, quiettime shows you how you breathed. No strap, no watch, no ring, and nothing the camera sees is kept.
Arrives in quiettime 2.0, the November 2026 update. Everything below describes that release.
What you do
Set the phone on the table about an arm's length away, screen toward you. The app tells you if you are too close or too far. Start the sit and close your eyes. That is the whole setup. You never look at the phone until the bell.
What it reads
Your breaths per minute. How long each inhale and each exhale ran, on average, and how the exhale compares to the inhale. You see it after the sit, on one card, with the sit's timeline underneath. It compares today with your own past sits, never with other people, and there are no leaderboards for any of it.
What it says
One line, out loud, at the halfway mark, and only if your exhale could be longer. If your exhale is already the longer half of each breath, it stays quiet. It speaks because of what it saw in your breathing, not on a schedule. Afterward the card tells you what happened next: whether your exhale ran longer after the line.
What it keeps
The numbers, in your history on your phone. Not the pictures. The camera runs live and nothing it sees is recorded, stored, or uploaded. There is no account, no server, and no video anywhere. You can turn the camera off for any sit, and the timer works exactly as it did before.
What it is not
It is not a medical device and it does not diagnose anything. It is a read of a practice: a way to notice what your breathing did while you sat, and whether it changed over the weeks. If paying attention to your breath makes you more tense rather than less, leave the camera off. Plenty of people sit better with a spot on the wall.
Which phones
An iPhone with Face ID. On other iPhones the rest of quiettime works the same and the camera option does not appear.
How accurate is it?
We have not published accuracy numbers yet. We are comparing the read against a chest belt on real people, and when those numbers exist they go on this page, with how many people and how they were measured. Until then, treat the read as a mirror of your practice, not a measurement to act on medically.
Patent pending
The way quiettime reads breath through the camera is the subject of a pending US patent application by Movebook LLC.
Does quiettime record video of me?
No. The camera runs live on the phone and nothing it sees is recorded, stored, or uploaded. The app keeps only the numbers it shows you, in your sit history on your phone.
Do I need an Apple Watch, a chest strap, or a ring?
No. Nothing goes on your body. The phone sits on the table about an arm's length away.
Does it work with my eyes closed, in a dim room?
Yes. You never look at the phone during the sit. A dim room is fine.
Which iPhones can read breath?
An iPhone with Face ID. On other iPhones the rest of quiettime works the same and the camera option does not appear.
What does it cost?
Five camera sits are free. After that the camera is part of quiettime Pro, one purchase of $9.99, no subscription. Anyone who already bought Pro gets it at no charge.