The smartest interval training timer for iOS and Apple Watch. Build workouts from scratch or snap a photo — the AI Coach handles the rest. Track heart rate zones, sync across devices, and review your progress with detailed analytics.
From AI-powered coaching to real-time heart rate tracking — built for athletes who take their training seriously.
Let AI remix your workouts instantly. Make them harder, easier, swap exercises, go equipment-free, or switch to low-impact — all with a single tap.
Snap a photo of any workout — from a whiteboard, Instagram post, or TikTok screenshot — and the app builds the interval timer for you automatically.
Your Watch app launches automatically when you start a workout. Run timers independently on your wrist with real-time heart rate streaming back to iPhone.
Monitor your heart rate in real time with 5-zone classification. See zone distribution breakdowns after every workout to track your intensity.
Track every session with a calendar view, workout streaks, and detailed stats including heart rate, calories burned, and zone time breakdowns.
Quick uniform workouts in Simple mode, or complex training patterns with variable durations, custom rest periods, and round management in Advanced mode.
Create workouts with multiple exercises and rounds. Drag-and-drop reordering, round duplication, and real-time total duration calculation.
Your saved workouts sync seamlessly across all your devices via iCloud. Never lose a workout, and pick up right where you left off.
Workouts automatically save to Apple Health with heart rate data, active and total calories, and proper activity type categorization.
Share your custom workouts with friends and training partners via shareable links. Import shared routines and discover new training patterns.
Interactive countdown with play/pause/resume, configurable sound packs, voice announcements, and haptic feedback for every transition.
Fully localized in over 25 languages including English, Spanish, French, German, Japanese, Chinese, Arabic, Hindi, Korean, and many more.
Join thousands of athletes using Peak Interval to push their limits. Free to download.
Download on App Store