Interval Timer by STRNTH
Workout & HIIT interval timer
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Bug fixes
The developer, Next Big Leap Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Next Big Leap Ltd
- Size
- 58 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Contains
Advertising
- In-App Purchases
Yes
- Remove ads $9.99
- Copyright
- © 2026 Next Big Leap Ltd