Intervalla vs Interval Timer by STRNTH

Free. No ads. No account required. Intervalla is a precision interval timer built for serious training. Whether you follow the classic Tabata protocol, push through an AMRAP session, or design your own custom intervals — this app keeps you on pace with a clean, distraction-free interface. THREE TRAINING MODES • Tabata — 20s work / 10s rest with configurable rounds • AMRAP — As many reps as possible in one timed block • Custom — Set your own work, rest, rounds, warm-up and cool-down LIVE HEART RATE Connect any Bluetooth Low Energy heart rate monitor (Polar, Garmin, Wahoo, etc.) and see your BPM in real-time. Switch to HR mode for a live sparkline graph that tracks your intensity throughout the session. After your workout, get a full summary with avg/max/min BPM and time in each heart rate zone. WORKS WITH YOUR SCREEN LOCKED Put your phone in your pocket and train. Audio cues play reliably in the background, and your heart rate monitor stays connected — even with the screen off. DESIGNED FOR FOCUS • Circular progress ring with phase-specific colors • Distinct audio cues for work, rest, and transitions • Lock controls to prevent accidental taps mid-workout • Dark interface that's easy to read mid-workout SAVE YOUR FAVORITES Save up to 5 custom presets and start any workout with a single tap. Three built-in presets included to get you started immediately. AUDIO THAT WORKS Plays through the silent switch on iOS — never miss a cue. Different tones for work start, rest start, countdown, and workout complete. SHARE WORKOUTS Create a workout and share it with friends, training partners, or your community. One link opens a ready-to-run timer. COMPLETELY FREE No ads, no subscriptions, no account required. Just open and train. Built with care in Norway.

Interval Timer by STRNTH is a free interval timer for HIIT, Tabata, EMOM, AMRAP, boxing rounds, running intervals, stretching and more. Build any timer you want with no fixed structure, then run it hands-free and read it from across the room. BUILD ANY TIMER - Add as many steps as you like, each with its own label, duration, colour, sound and voice. - Group steps into repeat blocks so a round loops as many times as you need. - Link separate timers together to chain a warm-up, workout and cool-down into one session. - Start from a template: Couch to 5K, Tabata, HIIT, 7 minute workout, EMOM, AMRAP, boxing rounds, Pomodoro, box breathing and full body stretch. RUN IT HANDS-FREE - A giant readout inside a progress ring, sized to read from across the gym. - Full-screen colour per step so you know your phase at a glance. - Voice reads each step and announces what is next before it arrives. - Sound cues on the last three seconds, plus beep, go, switch, rest, bell, horn, gong and whistle tones. Import your own sounds too. - Optional spoken 3-2-1 countdown, a cadence metronome from 60 to 180 BPM and haptic feedback. - Choose what the screen shows: interval time, total time, interval count, the clock or heart rate. MORE TOOLS - A countdown tab with quick presets for a fast single timer. - A stopwatch with laps that highlight your fastest and slowest split. - Light and dark themes and your own custom step colours. - Share a timer as a link or a file, and import timers others send you. ACROSS YOUR DEVICES - An Apple Watch companion runs your timers on the wrist with colour and haptics. - Pair a Bluetooth heart rate strap to see live BPM, zones and more while you train. - Save finished sessions to Apple Health as workouts. - Back up your timers to your private iCloud. FREE, WITH A ONE-TIME UPGRADE Interval Timer is free and supported by ads. A single 9.99 purchase removes ads for good. No accounts, no subscriptions, no cloud sign-in. Your timers stay on your device. Part of the STRNTH family of training apps.