An interval, boxing and breath timer for Android. Effective 24 September 2026; updated 9 November 2026: the timers are free, Bell Pro is €0.99 once.
Bell collects nothing. There is no account, no sign-in, no ads, no analytics and no third-party tracking SDK. The app does not request the internet permission at all, so it cannot send anything anywhere — this is enforced by Android, not by a promise.
All of it lives in Bell's private app storage on your device. It is never uploaded, it is excluded from cloud backup, and uninstalling the app deletes it.
Bell asks for VIBRATE, used for the haptic cue at the end of a phase, and com.android.vending.BILLING, which lets it ask the Google Play app to show the Bell Pro purchase sheet. It does not ask for internet, location, storage, contacts, camera, microphone, phone state or anything else.
The timers are free for good: BOX, TABATA and BREATHE, with their bells, their haptics and your history. Bell Pro — a single in-app purchase, €0.99 in the euro area, paid once, no subscription — unlocks the rest: the sequence shape, the editor for your own schedules, and more bells. The purchase is handled entirely by Google Play — Google collects and processes your payment details under its own terms and privacy policy, and Bell never sees them. Bell only asks the Google Play app on your phone whether you own Bell Pro and keeps that yes/no answer in its private storage. Bell sends nothing about the purchase, or anything else, to us or to anyone.
None. Nothing leaves the device, so nothing is collected by us and nothing is shared with anyone. No data is sold, and no advertising identifier is read — Bell contains no ads and no advertising SDK.
Bell is not directed at children under 13, and it collects no data from anyone, children included.
If a future version ever collects or sends anything, this page will be updated before that version ships, and the Data safety section of Bell's Google Play listing will be updated with it.
Questions about this policy, or about the app: mat@taoaieng.io.