Surge vs Intervo

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.

Intervo is a fast, focused interval timer for HIIT, Tabata, circuit training, boxing rounds, EMOM and stretching. Build any work/rest interval, then let Intervo run the whole session for you — hands-free. EVERYTHING IS FREE All features are unlocked at no cost: save unlimited presets, voice countdown, sound cues and color themes. No subscriptions, no in-app purchases. FULLY CUSTOMIZABLE • Set prepare, work and rest durations • Choose rounds per set and number of sets • Add a longer rest between sets • One-tap Tabata preset (20s work / 10s rest x 8) CLEAR, BIG DISPLAY • Huge color-coded countdown ring you can read across the room • Each phase has its own color: prepare, work, rest, set break • Round and set progress at a glance • A preview of what comes next AUDIO & HAPTICS • Beeps on every phase change and the final 3-second countdown • Vibration feedback • Optional spoken voice countdown (English / Japanese) • Keeps the screen awake during a workout SAVE YOUR ROUTINES Save any configuration as a named preset and start it again with one tap. Tabata, HIIT, EMOM and more are included to get you going. PRIVATE & OFFLINE Intervo generates time entirely on your device. It needs no account, no sign-in and no internet connection. Nothing about your workouts ever leaves your phone. • English and Japanese • Light and dark themes with multiple accent colors • Designed for one-handed use Whether you do quick Tabata sets at home or full HIIT circuits at the gym, Intervo keeps you moving. Download it free and start your first interval in seconds. Intervo is free and supported by ads.