HIIT Trainer: Interval Timer

HIIT Trainer is a minimalist interval timer: set your work, rest, exercises, and rounds, tap start, and let it run. ● Automatic timing — warm-up → work → rest → round rest flows on its own; no need to touch your phone ● Voice coach — English or Chinese callouts for each phase and exercise name, with countdown beeps and haptics, so you never miss a cue even with the screen locked in your pocket ● Background music — energetic on work, chill on rest, fading out at the end to let the countdown through; import your own tracks too ● Energy-ring interface — big countdown + progress ring, light/dark adaptive, readable at a glance mid-set ● Workout history — every session saved automatically: day streak, weekly minutes, full history, and CSV export ● Daily reminders — schedule per weekday to build the habit ● Zero friction — no account, no ads, no data collection; your workout data stays on your device Great for HIIT, Tabata, jump rope, indoor cycling, and any bodyweight routine built on work/rest intervals. Universal for iPhone and iPad. The interface is English by default; you can switch to Chinese in Settings → HIIT Trainer → Language.