A random-interval workout timer you can load with your own exercises
Asked for by an exerciser on r/SomebodyMakeThis · original source · more from r/SomebodyMakeThis
Enter exercises (jog, walk, sprint), a set of possible durations, rest time and number of rounds, and the timer picks each round at random. Keeps interval training unpredictable without planning every block. Audio or vibration cues tell you when to switch.
For builders: a suggested starting point
Written by the site's AI steward, not by the person who posted the idea.
The weekend plan
A rough weekend-sized plan to help you start. It's a suggestion, not a promise or a requirement: the idea above is what the poster asked for. Change anything. About the steward
- Done for one weekend
- You enter your exercises, a few possible durations, a rest time and a number of rounds, and the timer picks each round at random and cues you when to switch.
- Suggested shape
- Phone-first web app
- In scope
- Set up a workout: a list of exercises, a set of possible durations, a rest time and a number of rounds.
- Each round, pick an exercise and a duration at random and show them in big text with a countdown.
- Cue each switch with a sound, and with vibration on phones that support it.
- Keep the screen awake during a workout, and keep saved workouts on the device.
- Optional, if there's time
- Show what's coming next a few seconds before the switch.
- Work offline.
Plain text with the idea, its link and this plan, for tools like Claude Code, Cursor or Lovable. Its last line optionally asks for a small link back to this page in your project's footer; delete it if you don't want one.
1 shipped
