HeartCast: Heart Rate Monitor

Heart rate monitor for Apple Watch & AirPods Pro 3! Broadcast your heart rate to fitness equipment - Peloton, Rouvy, and Bike trainers. Now with Google Fitbit Air Support

HeartCast broadcasts your heart rate from your Apple Watch or AirPods Pro 3 to Bluetooth-enabled fitness equipment and bike trainers, including Peloton Bike, Tread, Rouvy, and Zwift. Use the devices you already wear!

Now supporting external Bluetooth Heart Rate Monitors, like the new Google Fitbit Air.

Monitor your Heart Rate Zones in real-time on your Watch, AirPods Pro 3, and iPhone. Audio, Visual, and Haptic Heart Rate Zone alerts to stay on target during your workout. See your heart rate at a glance with Dynamic Island and Live Activity support on iPhone.

HeartCast uses Bluetooth to communicate directly with your fitness equipment. Your heart rate data never leaves your devices.

Ad-free, forever. Free to download and use!

In-App Purchases - HeartCast is completely free to download and use as a heart rate monitor!

• HeartCast Audible: Audible addon to announce your heart rate and heart rate zones without looking at your devices. Try it free in Preferences.
• HeartCast Pro: If you'd like to support HeartCast development, please consider a HeartCast-Pro donation.
• New features and improvements are always in the works.

About Your Privacy

• HeartCast monitors your heart rate and broadcasts it over Bluetooth to nearby compatible fitness equipment.
• HeartCast does not monitor or collect any other personal information!
• HeartCast can optionally save or discard your workouts. Apple Watch automatically saves some basic metrics during a workout and contributes directly to closing your Activity Rings.
• HeartCast does not save, store, or transmit your heart rate data to any external services. It is only used within the app and your nearby Bluetooth-enabled devices.
• HeartCast utilizes Google Analytics and Google Crashlytics to improve our features and identify and resolve critical issues with the application.
• HeartCast is not affiliated with Peloton or any other fitness equipment provider.

Getting Started with Apple Watch

1. Open HeartCast on your Watch and iPhone.
2. Press Start to begin a workout.

• This also enables Bluetooth.

1. Connect your preferred fitness equipment (Peloton, Rouvy, Zwift, etc.).

• Ensure HeartCast is visible on your iPhone when connecting to your devices.

Getting Started with AirPods Pro 3

1. Put in your AirPods Pro 3 and be sure they are paired with your iPhone or iPad.
2. Open HeartCast on your iPhone or iPad.
3. Press Start to begin a workout.

• This also enables Bluetooth.

1. Connect your preferred fitness equipment (Peloton, Rouvy, Zwift, etc.).

• Ensure HeartCast is visible on your iPhone or iPad when connecting to your devices.

Breathe easy and never wear an uncomfortable chest strap again. HeartCast will continue to run in the background during your workout.

Requirements

• An Apple Watch and iPhone, or AirPods Pro 3 and iPhone or iPad.
• Access to Apple Health to create workouts and read your heart rate data.
• Access to Bluetooth to cast to your fitness equipment.

Supported Fitness Equipment

• Peloton Bike, Bike+, and Tread
• Peloton App on iPad and Amazon Firestick
• Zwift (on iPad, Apple TV, or computer)
• ROUVY (confirmed by ROUVY support and users)
• TrainerRoad (iPad)
• Wahoo Fitness App (iPad)
• TacX Smart Trainer Software (Mac/iPad)
• Hammerhead Karoo 2 and Karoo 3
• FulGaz App
• Bryton Rider 450
• Lezyne Macro GPS
• NordicTrack iFit equipment (C2950 Treadmill, RW850 Rower)
• Echelon Fit App (iPad only)
• iGPSPORT bike computers (user-reported, results may vary)

Supported Bluetooth HRM

• Google Fitbit Air 2026

Unsupported Devices - Known Compatibility Issues

• Devices that do not support Bluetooth Low Energy (BLE)
• Garmin Edge devices (830, 1030, others).
• Echelon Bikes with integrated tablet.
• Wahoo Elemnt Roam/Bolt. (Mixed results from users.)

Please let us know if HeartCast works on your favorite fitness equipment!

Please visit our website for FAQ and Support: https://help.heartcast.app/

HeartCast was built with love by an avid Peloton user.