HIIT Timer supports both preset protocols and fully custom intervals.
Quick start
Tap any preset chip (Tabata, 30/30, Norwegian 4×4, etc.) — it loads everything and you can Start immediately.
Custom workout
Tap Set Up (or double-tap the timer display) to open the settings panel to set:
• Work time
• Rest time
• Number of rounds and sets
• Warm-up and cool-down
• Title and notes
During the session
The timer automatically cycles through work and rest. Use Pause, Reset, or Clear.
iPhone / iPad
Tap Enable Sound in the banner before starting.
Save & load
Use Import / Export at the bottom of the settings panel.