HIIT Pro: Interval Timer

Train smarter. Push harder. See results.

HIIT Pro transforms your iPhone and Apple Watch into a powerful high-intensity interval training system. Whether you're sprinting on a treadmill, cycling at home, or crushing bodyweight circuits, this app adapts to your workout style with precision timing, live heart rate monitoring, and intelligent feedback.

NO ACCOUNT REQUIRED
Open the app and start training. No sign-ups, no logins, no subscriptions. Your workout data stays on your device and syncs only to Apple Health. Your privacy is respected, always.

WHY ATHLETES CHOOSE HIIT PRO
Unlike basic interval timers, HIIT Pro understands that effective training requires more than countdown clocks. Set specific targets for each interval (speed, heart rate zones, power output, RPM, or reps) and watch your performance improve with every session.

REAL-TIME APPLE WATCH INTEGRATION
Your heart rate appears instantly on your iPhone screen, synced continuously from your Apple Watch. No chest straps required. Get alerts when you exceed your max heart rate, and review detailed charts after every workout to track your cardiovascular progress.

TRAIN TO YOUR FAVORITE MUSIC
Connect Spotify and assign specific tracks to different intervals. Pump-up songs for sprints, recovery playlists for rest periods. Your music automatically matches your workout intensity.

PROFESSIONAL WORKOUT TEMPLATES
Start immediately with scientifically-backed routines:
- Original Tabata Protocol (20s work / 10s rest)
- ACSM 7-Minute Workout
- Custom HIIT configurations

Or build unlimited custom workouts with multiple interval types: warm-up, sprint, recover, cool-down, and exercise-specific intervals for rowing, cycling, and bodyweight training.

INTELLIGENT INTERVAL CONTROL
Life happens. Skip ahead, add 15 seconds, or pause without losing your flow. Preparation alerts flash your screen and tap your wrist before each transition, so you're always ready for the next burst.

COMPREHENSIVE WORKOUT ANALYTICS
Every session saves automatically to Apple Health. Review heart rate curves, see exactly when you peaked, and track your fitness journey over weeks and months. All data stays local on your device.

PERSONALIZE EVERYTHING
Choose light, dark, or system themes. Customize alert timing. Create workout icons. HIIT Pro fits your style and preferences.

PERFECT FOR
- Treadmill sprints and incline training
- Spin bike and indoor cycling
- Rowing machine intervals
- Bodyweight HIIT circuits
- CrossFit-style conditioning
- Boxing and martial arts drills
- Running and outdoor cardio

BUILT BY SOMEONE WHO GETS IT
HIIT Pro was created by a developer rebuilding his own fitness after becoming a father. This isn't a corporate product. It's a tool built from personal experience, designed to help busy people stay consistent when life gets hectic.

Download HIIT Pro and experience interval training the way it should be: intelligent, connected, and completely in your control.