Bell: Interval & Breath Timer

Bell is a timer for the two places a timer actually matters: the gym and the cushion.

Set your rounds and it speaks the turn — a bright double strike into work, a low gong into rest — so you never look at the screen mid-combination. A tick counts the last ten seconds of any phase, and the ring shows exactly where you are in it.

WHAT'S INSIDE
• CYCLE — boxing and HIIT rounds: work/rest × rounds (BOX, TABATA, or your own)
• FLOW — box breathing and other paced patterns (4-4-4-4 and friends)
• SEQUENCE — three-stage practices you name yourself (MEDITATE ships as stretch · sit · land)
• the editor: change any schedule's rounds, times and stage names, or build one from scratch
• history: minutes per day, a 14-day strip, streaks and ranks

BUILT TO BE HEARD, NOT WATCHED
The sound is synthesised on the phone — a bell's own partials, a room behind it, and ticks that stay quiet for short breath phases. It plays through the media stream, so your volume rocker and your Bluetooth speaker both work. Haptics where they help, never as the only cue.

PRIVATE BY CONSTRUCTION
Bell asks for vibrate (plus Google Play's billing permission, used only for the one-time unlock) and does not request the internet permission at all, so nothing can leave the phone — not your routines, not your history. No account, no sign-in, no ads, no analytics, no tracking SDKs. The whole policy is one page: https://collect.taoaieng.io/bell/privacy

PRICE
Bell is free for the timers themselves — BOX, TABATA and BREATHE, with the bells, the haptics and your history, for good. Bell Pro is €0.99, once, through Google Play: it unlocks the sequence shape (MEDITATE), the editor that turns any schedule into yours, and more bells. No subscription, no account.

No ads. No sign-up. Just a timer, a bell, and your own practice.