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HRM Battery Apple Watch chest strap utility

HRM Battery

Check your HR strap battery on Apple Watch before you train.

Open the app, connect a Bluetooth heart-rate strap, and see battery percentage plus live heart rate on your wrist.

App Store Read battery guide Get support
watchOS BLE heart-rate straps Battery percentage No ads
HRM Battery ready to connect to a saved strap HRM Battery showing full strap battery and live heart rate HRM Battery saved device screen

What it does

HRM Battery is built for the quick pre-run, pre-ride, or pre-race check when a dead chest strap would ruin the session.

Reads battery status

The Apple Watch app connects to compatible Bluetooth LE heart-rate monitors that expose battery data.

Shows live BPM

Current heart rate appears beside the battery status so you can confirm the strap is awake and broadcasting.

Reconnects quickly

The app remembers the last device and supports quick reconnect from Apple Watch.

Made for one compact watch view

HRM Battery is a focused wrist utility: automatic scan, one-tap connection, battery color states, haptic confirmation, and no account required.

  • Supports standard Heart Rate Service and Battery Service devices.
  • Built for Polar, Garmin, Wahoo, and similar BLE chest straps.
  • No data collection, no analytics, no ads, no tracking.
Start screen with a saved heart-rate strap Battery percentage and live BPM on Apple Watch Saved device reconnect screen

FAQ

Does it need an iPhone app?

No. HRM Battery connects directly from Apple Watch to compatible Bluetooth heart-rate straps.

Which straps work?

Compatible Bluetooth LE heart-rate straps work when they expose battery data through the standard BLE Battery Service.

Why does heart rate show but not battery?

A strap can expose live BPM through the Heart Rate Service without exposing battery percentage through the standard Battery Service.

Does it collect training data?

No. HRM Battery has no account, no data collection, no analytics, no ads, and no tracking.

Support

For strap compatibility reports, connection trouble, or product questions, email support with your strap model and watchOS version.

Battery guide

How to check compatible chest strap battery levels from Apple Watch.

Privacy policy

How HRM Battery describes data handling and permissions.

App Store

Download HRM Battery for Apple Watch.