Interval Timer ~ HIIT & Tabata vs HIIT Trainer

"The timer numbers are too small to see mid-workout." "I wish I could instantly know when my rest is over." — Sound familiar? This app is an interval timer designed for strength training and HIIT, delivering your workout status intuitively through color changes. The screen turns "Burning Coral" during exercise and "Calm Indigo" during rest — so even if your phone is across the room, a single glance at the color tells you exactly what to do next. ■ Intuitive Timer Experience Through Visual Cues Reading tiny numbers when you're pushing your limits is frustrating. That's why this app features a unique color system. Color Navigation: The screen color changes dynamically for each phase — exercise, rest, and preparation. A glimpse of color at the edge of your vision keeps you informed without breaking your focus, so you can stay fully locked in on your workout. Minimal Design: Only the essential information, displayed large and clear. A clean, distraction-free UI means you can always operate it instinctively. ■ Even More Convenient with Apple Watch If you have an Apple Watch, you can control and track everything right from your wrist. Control & Check at a Glance: Start a timer on your iPhone and monitor or control it directly on your Apple Watch. Haptic Alerts: Tactile feedback (vibration) ensures you never miss a set transition — even when listening to music or working out in a noisy environment. Workout Log: Your workout history is recorded automatically. Sync records between Apple Watch and iPhone to review your past sessions anytime. ■ Total Customization Freedom Handles every scenario — HIIT, Tabata, bodyweight training, stretching, boxing, and more. Second-by-Second Settings: Fine-tune preparation, exercise, rest, sets, and cooldown to match your personal routine. Preset Save: Save your favorite workout menus and launch them with a single tap next time. Switch between multiple routines with ease. ■ Perfect For You If… You want to instantly know when to switch between exercise and rest You want to build a consistent HIIT or Tabata training habit You want to precisely time your gym intervals and level up your workouts You want to use your Apple Watch to train smarter You're looking for a simple, easy-to-use timer without complicated settings Every color change programs your next move into your body. This timer is your ultimate partner for a stronger daily workout.

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.