Surge: Interval Timer & HIIT

Surge is a beautifully designed interval timer for HIIT, Tabata, boxing rounds, EMOM and any circuit-style workout — at home, in the gym or ringside.

Pay once and it's yours forever. No subscriptions, no in-app purchases, no ads — every feature included.

Set your work and rest, pick your rounds and press play — Surge calls every phase with beeps and haptics, so you train bell to bell without watching the clock.

ROUNDS READY TO GO
• Tabata — 20s work / 10s rest × 8 rounds
• HIIT — 40s work / 20s rest × 10 rounds
• Boxing — 3:00 rounds with 1:00 rest × 6
• EMOM — 60-second intervals × 10
• Stretch — 30s holds / 10s rest × 12
• Edit any built-in preset to match your training

YOUR WORKOUT, YOUR RULES
• Work from 5 seconds to 10 minutes, rest up to 5 minutes
• 1–50 rounds, with an optional preparation countdown
• Save up to 20 presets with custom names and icons
• Skip a phase mid-workout; the screen stays awake to the final bell
• A large, glanceable countdown with an animated progress ring

BUILT RIGHT
• Pay once, own it for life — the price you see is everything
• No subscriptions, no in-app purchases, no upsells
• No ads, ever
• Megabytes, not gigabytes — no ad libraries, no analytics SDKs, nothing that isn't the app itself
• No account and no data collection — your presets never leave your device
• Designed for iPhone and iPad

Download Surge and let every round run itself.