Ditch the chest strap. Broadcast your Apple Watch heart rate to Garmin Edge, Wahoo ELEMNT, Hammerhead Karoo, and other cycling computers or fitness apps.
Join over 35,000 cyclists already riding strap-free:
Simply wear your Apple Watch®, your iPhone®, and start riding – no chest strap or third-party sensor required.
While setup can vary across devices, it’s compatible with most bike computers that support Bluetooth sensors.
Just one app instead of one more device. Skip the chest strap, enjoy the comfort, and have one less thing to charge, pack, or forget.
Looking for a simple and reliable way to track your Apple Watch heart rate with your cycling computer? The HRM Heart Rate Monitor app may be the answer you've been looking for – it's a bit like adding ANT+ to your Apple Watch.
The HRM Heart Rate Monitor app streams heart rate from the Apple Watch to any compatible bike computer. This example shows a Garmin Edge 540.
Simple by design. Built to enjoy your ride.
Launch HRM on your Apple Watch to measure and broadcast heart rate.
Launch HRM on your iPhone to connect standardized Bluetooth SIG heart rate data between your Apple Watch and cycling computer, fitness equipment, or training app.
Start your workout and see real-time heart rate on your cycling computer, fitness equipment, or training app.
Aug 15, 2023 - Janlouis A.
This app does exactly what it says it does. I can now use my Apple Watch with my cycling computer to monitor and display my heart rate while riding. The developer is also very quick to respond to emails and is very helpful!
Jul 7, 2024 - Gabriel Budisavljevic
Glad someone made this. I have the Garmin Edge 130 and I followed his setup video and it works seamlessly. Really glad I don’t have to wear an additional HR monitor to get this data into Garmin.
Jul 19, 2024 - MarkB69
Took a little bit of fiddling but that was more to do with Apple protocols and Bluetooth priorities. But once I’d clean started the watch app and phone app I was able to pick up the signal on Karoo and see my HR on the head unit. Initial reading was zero but that was just a small lag that was quickly updated. Thanks!
Join thousands of cyclists and fitness lovers who’ve gone strap-free. HRM is the missing link between your Apple Watch and your training gear.
"I wanted to ride with my Apple Watch, not a chest strap. So I built an app that just works."
As a cyclist and indie developer, I built HRM to bridge the gap between Apple Watch and cycling computers. The goal: simplicity, reliability, and performance without clutter.
It’s a tool for real-world training — no unnecessary fluff, just seamless heart rate broadcasting so you can focus on your ride.
