Surge HIIT: Interval Timer

HIIT shouldn't start with a fight against a confusing timer. Surge HIIT does the hard part for you: pick a workout, hit start, and move. Your phone — and your Apple Watch — call every interval so you never have to look down mid-burpee.

Built for people who want to sweat, not fiddle.

— WORKOUTS THAT ARE READY WHEN YOU ARE — Eight studio-quality HIIT workouts, beginner to advanced. No setup, no guesswork. Warm-up, work, rest, cooldown — all timed, all coached, all yours from the first tap.

— BUILD YOUR OWN, EXACTLY YOUR WAY — Drag-and-drop the perfect routine in our custom builder. Set work and rest to the second, name your exercises, pick your colors. Tabata, EMOM, circuits, ladders — if you can imagine it, you can build it. Frankly, the builder is tremendous.

— YOUR APPLE WATCH BECOMES A COACH — This is where Surge pulls ahead. Real-time heart rate. Active calories. Haptic taps on every interval change so you feel the switch without breaking stride. Your custom workouts sync straight to your wrist, and your Activity rings close automatically. Leave the phone on the bench.

— SPOKEN CUES, EYES UP — Surge announces each interval in a crisp neural voice and ducks your music so you hear it clearly. No squinting at a screen between rounds. Choose your preferred accent and gender in Settings — preview it before you commit.

— NINE THEMES WITH REAL CHARACTER — From cool Glacier blues to molten Ember, electric Voltage, and a neon Tron-inspired grid. Make the app yours.

— 100% OFFLINE. ZERO ADS. ZERO NONSENSE — No internet required. No accounts. No ads interrupting your set. Ever. Just you and the work.

— APPLE HEALTH — Every session saves to Apple Health — workouts, active calories and heart rate — so your progress lives where the rest of your fitness data does.

— START FREE — Two built-in workouts and two custom workouts are free forever. Want it all? Start a 14-day free trial — no credit card, no commitment. Keep the free workouts as long as you like.

Surge Premium unlocks: • All 8 HIIT workouts • Unlimited custom workouts and exercises • Every color theme • The full Apple Watch experience

It's a HIIT timer that respects your time. Believe me — your next workout starts the second you open it.

Download Surge HIIT and go.

——— Subscription details: A yearly subscription is available after the free trial, or buy Lifetime once and own it forever. Payment is charged to your Apple ID. The yearly subscription auto-renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://surgehiit.app/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/