# YoBPM

> YoBPM is an iOS app that turns your Apple Watch into a Bluetooth heart rate monitor for Zwift and other indoor cycling apps. No extra sensor or chest strap needed.

## About

YoBPM broadcasts your Apple Watch heart rate to Zwift via standard Bluetooth HRM protocol. The app consists of two components: an Apple Watch app that reads your heart rate, and an iPhone app that receives it and broadcasts it as a Bluetooth heart rate monitor. Zwift (or any compatible app) then pairs with your iPhone just like it would with any standard HRM device.

- Website: https://yobpm.com
- App Store: https://apps.apple.com/app/yobpm-hrm-for-zwift/id6757267175
- Community & Support: https://www.reddit.com/r/YoBPM/
- Developer: YoBPM

## Key Features

- **No Extra Hardware**: Uses the heart rate sensor already on your Apple Watch. No chest strap or arm band required.
- **Standard Bluetooth HRM**: Broadcasts as a standard Bluetooth heart rate monitor. Any app that supports Bluetooth HRM can connect (Zwift, TrainerRoad, Rouvy, etc.).
- **Instant Connection**: Connect in seconds. Start a workout on the watch, broadcast from your phone, and pair in Zwift.
- **Accurate Data**: Apple Watch optical heart rate sensor provides reliable readings for indoor cycling sessions.
- **Battery Efficient**: Optimized to minimize battery drain on both iPhone and Apple Watch. About 10-15% Apple Watch battery per hour (similar to any workout).
- **Background Mode**: Keeps broadcasting even when you switch to other apps or check notifications on your watch.
- **Watch Complication**: Add YoBPM to your watch face for quick access.

## How It Works

1. Open YoBPM on your Apple Watch and start a workout.
2. Open YoBPM on your iPhone and tap "Start Broadcasting".
3. In Zwift, pair your iPhone name as your heart rate monitor.
4. Ride! Your heart rate now appears in Zwift.

## Compatibility

- Apple Watch Series 4 and newer
- watchOS 10 or later
- iPhone with iOS 17 or later
- Works with Zwift, TrainerRoad, Rouvy, and any app supporting Bluetooth HRM devices

## Required Permissions

### iPhone
- **Bluetooth**: Required to broadcast heart rate to Zwift.
- **Notifications** (optional): Alerts when your watch disconnects during a session.

### Apple Watch
- **Heart Rate**: Required to read heart rate data (Settings → Health → Apps → YoBPM).
- **Workouts**: Required to start a workout session (Health → Apps → YoBPM).

## Pricing

- **Yearly**: $19.99/year — 3-day free trial, cancel anytime.
- **Lifetime**: $14.99 one-time payment — all future updates included.

## FAQ

- **Which Apple Watch models are compatible?** Series 4, 5, 6, SE, 7, 8, 9, 10, and Ultra models running watchOS 10 or later.
- **Is the Apple Watch heart rate accurate enough for training?** Yes. Apple Watch optical sensors provide reliable data for most indoor cycling. A chest strap may offer slightly more precision during very high intensity intervals.
- **Does YoBPM work with other apps besides Zwift?** Yes. It broadcasts as a standard Bluetooth HRM, compatible with TrainerRoad, Rouvy, and others.
- **Why do I need both the iPhone and Apple Watch app?** Apple Watch cannot directly broadcast Bluetooth to other devices. The iPhone receives the heart rate from the watch and rebroadcasts it as a Bluetooth HRM.
- **Can I use YoBPM while my phone is in another room?** Your iPhone needs to be within Bluetooth range of both your Apple Watch and the device running Zwift. Keep your phone near your trainer setup.
- **How much battery does YoBPM use?** About 10-15% Apple Watch battery per hour (similar to any workout), minimal impact on iPhone battery.

## Languages

The website and app are available in English, French, German, Spanish, Italian, and Japanese.