Interval Timer

Build a custom interval workout: warmup, work, rest and cooldown. Each phase has its own duration and colour. The timer plays audio cues at each transition so you can focus on training.

How it works

Each interval is a colored block with a name and duration. The timer marches through them sequentially, changing background colour to match the current interval and beeping at each transition.

Key features

• Unlimited custom intervals
• Named phases (Warmup, Work, Rest, Cooldown, etc.)
• Per-phase colours
• Audio transition cues
• Progress indicator
• Add or remove intervals on the fly

Common use cases

Pro tips

• ◆Colour-code by intensity: green=work, red=rest, blue=warmup.
• ◆Test your setup with a single quick run before your real workout.

Common mistakes to avoid

• ✕Skipping the warmup interval — increases injury risk considerably.

Frequently asked questions