Preset Countdown is for instant fixed-duration timers.
Quick start
Tap any preset (15 s, 30 s, 1:00, etc.) to start that countdown immediately.
Custom workout
Tap Set Up (or double-tap the timer display) to open the settings panel to enter any custom time.
During the session
Pause, Reset, or Clear using the bottom buttons.
iPhone / iPad
Tap Enable Sound in the banner.