Wear OS Cardio Sync & Watch Workout Tracking

NutriMotion’s Wear OS support has been upgraded with improved cardio workout syncing between the phone and watch.

The watch and phone can now work together more closely during cardio tracking. Workout state, route data, calories, pace, distance and supported heart-rate summaries can be passed between devices, making the Wear OS app a more useful companion for outdoor training.

What’s included

• Watch-to-phone workout controls - start, pause, resume and stop cardio sessions from the watch.
• Phone navigation from watch commands - the phone can open the right workout screen when a watch command needs attention.
• Live workout mirroring - active watch cardio sessions can be mirrored on the phone.
• Route coordinate syncing - route coordinates can be sent incrementally instead of requiring one large update.
• Watch workout saving - workouts tracked on the watch can be sent back to the phone and saved.
• Improved calorie estimator sync - watch and phone can exchange cardio estimator configuration.
• Heart-rate summary fields - average, minimum and maximum heart rate can be stored where available.
• Estimated steps - cardio workouts can include estimated step data where supported.
• Estimator versioning - workouts can record which cardio estimator version was used.

Better phone and watch handoff

The phone now listens for workout commands from the watch.

That means the watch can request the phone to start a cardio session, pause an active session, resume it, stop it or save workout data that was recorded on the watch.

If permissions are missing, the phone can route to the permission flow instead of silently failing. This is especially important for GPS workouts because background location and device permissions can affect whether route tracking works reliably.

Live mirrored workouts

When the watch is actively tracking a workout, the phone can receive mirrored workout state.

This includes core workout data such as:

• Activity type.
• Workout status.
• Distance.
• Moving time.
• Elapsed time.
• Pace.
• Speed.
• Calories burned.
• Route coordinates.
• Elevation gain and loss.
• Heart-rate summary data where available.

This makes it easier to use whichever screen is most convenient. Start from the watch, check the phone, then save the workout back into NutriMotion.

Improved cardio calorie data

Cardio workouts now carry more estimator information.

The workout state can include average heart rate, minimum heart rate, maximum heart rate, heart-rate sample count, heart-rate coverage ratio, estimated steps and the estimator version.

This gives NutriMotion a better foundation for consistent calorie tracking across devices. If the watch and phone are both involved in the workout, they can work from shared estimator inputs rather than treating each device as a separate tracking island.

Route syncing

Route data can now be sent incrementally from phone to watch while a workout is active. Instead of repeatedly sending every coordinate, NutriMotion tracks which phone coordinates have already been sent and only sends the new ones.

This is better for live cardio sessions because route data can grow quickly during longer runs, walks, cycles or hikes.

Saving watch-tracked workouts

When a workout is completed on the watch, the watch can send the final workout data to the phone. The phone acknowledges the workout, clears the active watch-tracking state and passes the route into the normal save flow.

This keeps watch-tracked cardio workouts part of the same NutriMotion history as phone-tracked workouts.

Why this matters

A fitness app with a watch companion should not feel like two separate apps.

This update makes Wear OS cardio tracking more connected: the watch can control workouts, the phone can mirror them, route data can sync between devices and saved workouts can return to the main NutriMotion log.