IntervalGuide
The smart interval timer with real-time heart rate monitoring. Built for boxing, HIIT, Tabata, and any timed workout.
Features
Custom Interval Timers
Build any workout structure — rounds, rest periods, warm-up, cool-down. Fully customizable.
Real-Time Heart Rate
Connect any Bluetooth LE heart rate monitor and see your BPM live during workouts.
Wear OS Companion
See your timer and heart rate directly on your wrist with the Wear OS companion app.
Boxing Bell & Audio Cues
Authentic boxing bell sounds and voice prompts so you never miss a round change.
Heart Rate Zones
Track which zone you're training in — fat burn, cardio, or peak — in real time.
100% Private & Offline
No account required. No cloud. Everything stays on your device.
See It in Action
Join the Closed Beta
IntervalGuide is live on Google Play in closed testing. Send your Google account email address to support@tremia.app and we'll add you to the testing list — then download the app directly from Google Play.