HIIT: Running Interval Timer

Build better interval runs — fully custom, simple to use, and made for Apple Watch. Interval Running is the fast, flexible HIIT run tracker for runners who want full control over their workouts.

Create your perfect interval plan

• Customize every interval: set time, distance, or run “open”
• Design HIIT, tempo, fartlek, pyramid, or progression workouts
• Save your favorite routines and reuse them anytime

Run smarter with real-time tracking

• See interval goals, pace, cadence, and heart rate as you run
• Clear audio cues keep you on track without checking your phone
• Works seamlessly with Apple Watch — run phone-free

Track your progress

• Detailed post-run analysis
• Export GPX files
• Syncs your workouts with Apple Health
• Supports external heart rate monitors

Whether you're training for 5K, 10K, a half marathon — or you simply want structured HIIT running sessions — Interval Running gives you only what you really need to stay focused, fast, and motivated.

Health app integration With your permission, your workouts count toward Activity Rings, including the Exercise and Move rings.

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