Any heart rate monitor that connects over Bluetooth will pair with the CicloZone app.
Recommended brands
Popular Bluetooth chest straps and arm bands that work well include:
Polar H7, H9, H10, OH1
Wahoo TICKR family
Garmin HRM-Dual
Suunto Smart Belt
CooSpo (entry-level)
How to pair
Make sure your HR strap is switched on and the contacts are damp.
Turn on Bluetooth on your phone and grant permission to the CicloZone app.
On the Bluetooth page in the app, your HR monitor appears under devices — tap to connect.
What if I don't have a HR monitor?
You can ride without one. If the bike provides power, the app uses power-based zones.
If both HR and bike signals are missing during a class, the dial shows an inactive state until one of them reconnects.