HRM Heart Rate Monitor

Ditch the chest strap. Use your Apple Watch as a heart rate monitor for your Garmin Edge, Wahoo ELEMNT, Hammerhead Karoo, or any BLE-equipped cycling- or fitness computer — no extra hardware needed.

The HRM Heart Rate Monitor app reads your heart rate from Apple Watch via HealthKit and broadcasts it from your iPhone over Bluetooth Low Energy. Your cycling computer picks it up as a standard heart rate sensor, just like a chest strap — but without one.

COMPATIBLE DEVICES

• Garmin Edge 540, 550, 840, 850, 1040, 1050, 130, Explore, …

• Wahoo ELEMNT BOLT, ROAM, ACE

• Hammerhead Karoo 2, Karoo 3

• Any cycling computer, indoor trainer, or fitness app that accepts BLE heart rate sensors

Other models not listed here may be compatible. Full compatibility list and setup guide: https://gethrm.app/compatibility/

KEEP IT SIMPLE

• Works with your iPhone locked and in your jersey pocket

• Your heart rate data stays in Apple Health — private and secure

• No workout tracking, no training zones, no account required

• Requires both Apple Watch and iPhone

Join over 45628 cyclists already riding strap-free. Try it free for 7 days — then just $4.99/year.

HEALTH DATA

HRM uses HealthKit to read heart rate data from your Apple Watch. This data is only used to broadcast your heart rate to your cycling computer. It is never used for advertising or data mining purposes, and is not shared with third parties.

Terms of Use: https://gethrm.app/legal/terms/

SUBSCRIPTION

HRM Heart Rate Monitor requires a subscription ($4.99/year) after a free 7-day trial. Your subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Your Apple Account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription in your Apple Account Settings at any time.