On the watch
- Standalone Wear OS app. It does not need a phone to record
- Connects directly to a Bluetooth LE heart-rate strap
- GPS speed
IntervalTrak · Wear OS + Android
Finish the intervals on your wrist. Break them down on your phone.
A standalone Wear OS interval-training app that connects straight to a Bluetooth LE heart-rate strap and uses GPS for speed, with an Android companion for the deep dive.
- No phone needed to record
- BLE heart-rate strap + GPS
- Opt-in Health Connect
The job IntervalTrak does
Finish intervals on the watch. Review them in detail on the phone. Count them toward your health picture, without losing the simplicity of watch-only capture.
Two devices, one workout
Capture on the watch. Analyze on the phone.
On the phone
- Android companion app built with Jetpack Compose
- Durable workout history and side-by-side workout comparison
- Heart-rate and speed charts, plus export
- Opt-in Health Connect write, so workouts count toward Samsung Health and Google's health picture
Shipped features
Train with intent. Debrief with data.
Time in zone
See your time in each zone for every workout.
Debrief vs. plan
Compare what you did against the intent of the plan.
Plan progress trends
Track progress on your interval plans over time.
Weekly volume & load
Weekly volume and load trends.
Two-way plan sync
Interval plans sync both ways between watch and phone, with sync status shown.
Notes, tags & RPE
Add notes, tags and rate of perceived exertion to each workout.
Who it's for
Interval athletes on Wear OS
Built for people who train intervals with a Wear OS watch and a Bluetooth LE heart-rate strap, and want detailed review on Android afterward.
Built with
Kotlin, in a Gradle multi-module project with separate watch, phone and shared core modules.
Windward Logic · Free proof of concept
Got an idea that needs to move fast?
IntervalTrak is a Windward Logic product. Bring us your own idea, for wearables, mobile or the web, and we will build the proof of concept for free. You only pay if you want it in production.