"Silent" usually means "quieter"
Most breathing apps that describe themselves as silent mean the voice is optional, or the music can be turned down. Something still runs: an expanding circle you follow with your eyes, a chime at the turn of the breath, an ambient track under it. Turn all of that off and, in most apps, you are left with a timer.
Tacet has nothing to turn off. There is no audio in the app at all, and the screen is dark by default for the whole session. What remains when you subtract the sound and the animation is the entire product, not a stripped-back mode of it.
The vibration is the entire session — by default, not as a setting.
Why touch, and not eyes or ears
If your session is about to be followed by a conversation, an interview, a patient, or a client call, then audio and visual guidance borrow exactly the faculties you are about to spend: your eyes, your ears, your attention. You finish the exercise having drained the thing you were about to need.
Touch is the channel the next encounter does not need. A breath paced against your palm costs you nothing you are about to use, which is why you can walk in unspent rather than freshly tired out by your own coping mechanism.
There is a second consequence, and it is the practical one: a channel nobody else can perceive is a channel you can use in front of people.
What a silent session actually looks like from outside
- A dark phone screen — on an OLED display, the pixels are genuinely off.
- No sound, at any volume, at any point.
- No notification, no banner, no status bar activity anyone would read as a wellness app.
- A vibration you tune yourself: strong enough to follow in your hand, quiet enough that nobody across the table hears it.
You can hold the phone, leave it face-down on a table, or keep it in a pocket. There is nothing to look at, so where the phone is does not change the session.
Silent all the way down, not just during the session
A discreet session inside a conspicuous app is not discreet. The name is an abstract musical term, the icon is a mark rather than a symbol of wellness, and the optional daily reminder carries the app name and one neutral line — nothing a colleague glancing at your lock screen could read anything into. There is no account, so there is nothing about you stored anywhere to be seen in the first place.
A practical side effect: it does not depend on hearing
Because there is no audio anywhere in Tacet, nothing in the practice depends on being able to hear it. Guided breathing that lives in a voice track is unusable if you are deaf or hard of hearing; a breath that arrives through the hand is not. And because the screen is dark, the session is narrated for screen readers instead — the time remaining and how to end it — so it does not depend on sight either.