Surge: Interval Timer & HIIT

Surge is a beautifully designed interval timer built for HIIT, Tabata, boxing rounds, EMOM, and any circuit-style workout — at home, in the gym, or ringside. Set your work and rest periods, choose your rounds, and go. BUILT-IN PRESETS • Tabata — 20s work / 10s rest × 8 rounds • HIIT — 40s work / 20s rest × 10 rounds • Boxing — 3:00 work / 1:00 rest × 6 rounds • EMOM — 60s intervals × 10 rounds • Stretch — 30s work / 10s rest × 12 rounds FULLY CUSTOMISABLE • Adjust work time (5s – 10:00) • Adjust rest time (0s – 5:00) • Set rounds (1 – 50) • Preparation countdown (0 – 30s) • Run any interval you like, no setup or sign-up first DESIGNED TO PERFORM • Dark UI with animated progress ring • Large, glanceable countdown display • Audio cues and countdown beeps • Haptic feedback on phase transitions • Screen stays awake during workouts • Universal — one app for iPhone and iPad SURGE PRO (one-time purchase, no subscription) • Save your own presets — up to 20 in total • Edit the built-in presets • Unlock all 20 preset icons • Skip a phase mid-workout ZERO DISTRACTIONS • No account required • No ads • No data collection — your presets stay on your device • Just press play Perfect for CrossFit-style WODs, circuit training, jump rope intervals, strength training, yoga flows, and any timed workout routine.