HeartCast

HeartCast turns your Apple Watch into a heart rate broadcaster, sending real-time heart rate data to cycling computers and trainers via Bluetooth BLE

BeatCast is a pure software solution that broadcasts real-time heart rate from your Apple Watch to cycling computers via Bluetooth Low Energy (BLE) — no chest strap needed.

Key Features: • Direct Mode: Apple Watch broadcasts BLE heart rate signal directly. Search for "heart-watch" on your bike computer to connect. • Bridge Mode: Watch sends heart rate to iPhone, which broadcasts BLE signal (device name "heart-phone") for broader bike computer compatibility. • Real-time Sync: Watch and iPhone stay in sync via WatchConnectivity. • 5 Heart Rate Zones: Based on the Karvonen HRR formula, with customizable age and resting HR. • Dynamic Island & Lock Screen: Live heart rate, zone name, and connection status at a glance. • Privacy First: All data processed locally on device. No data uploaded to any server. Fully compliant with privacy regulations.

Perfect for: • Monitoring heart rate on your bike computer while cycling • Replacing a traditional chest strap with just your Apple Watch • Tracking heart rate zones during indoor training