GymClock — your interval & HIIT timer on the wrist.

Build a circuit from your own named exercises, set the work time, rest time and number of rounds, then start training without ever touching your phone. GymClock counts every interval down for you and uses the watch's vibration to keep your eyes off the screen — so you can focus on the workout.

Features
- Background run & resume
- Independent on the phone
- Custom routines: name each exercise and set work, rest and round count
- Large, glanceable display — current exercise, big countdown, round progress (e.g. "2/5 Lap 3") and a preview of what's next
- Color-coded phases: work and rest are instantly distinguishable (high-contrast on black-and-white watches too)
- Vibration cues: a buzz on the final seconds, the half-way mark, and the end of every interval — plus a long buzz when the workout is done
- Set rest to 0 for non-stop circuits
- Live heart rate (BPM) on watches with a heart-rate sensor
- Skip forward, skip back, pause and reset, all from the buttons
- Settings stay on the watch — once configured, it works fully offline

Controls
Select: start / pause
Hold Select: stop & reset
Hold Up: previous exercise
Hold Down: next exercise