Developer builds programmable, URL-based timer web app for gym and stretch routines

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A developer has created a free, open-source timer web app designed for gym workouts and stretching sessions involving repeatable sequences. The app counts down programmed intervals, emits audio beeps, and reads activity names aloud. Users can define their own routines using a declarative notation, making the timers fully customizable. Notably, the app requires no backend — the entire routine is encoded directly in the URL, enabling easy bookmarking and sharing via QR code. The project is available at timer.jotaen.net, with source code published on GitHub.

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