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.
3. 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.
4. 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.
Disappointed! Tried connect to Garmin Fenix 8 Pro sapphire using AirPods Pro 3 with no luck. Fenix sees Heartrate cast but will not connect. Hoping this will work in the future. 4 stars because of the pricing model and the ability to test before buying. If it would connect I would buy without reservation. Does display HR from AirPods Pro 3 on iPhone without issue.
Developer Response
Hi Gymrat34, thanks for your balanced rating in your review. While we state that HeartCast does not work with Garmin devices, we understand the desire. Please email us if you'd like to help us test HeartCast with your Fenix device. contact@heartcast.app
Sometimes works
faithfracture
This works sometimes. Often have to kill the app multiple times in both my watch and phone before they will sync up and I can actually start broadcasting. Even then, sometimes it will just stop working halfway though my ride. Most of the time once it’s connected it doesn’t send updates at regular intervals there will be periods where my cycling app doesn’t receive a value for several seconds up to several minutes. Recently, they added the ability to record works to apple health. This is REQUIRED now for the app to work. I do not want this app writing workouts to Apple health. My cycling app does that. All this is doing is forcing me to go delete a workout that doesn’t even have accurate data to begin with.
Developer Response
Under Preferences please choose: “Never Save” for the Workout option: “Save to Apple Health”.Please feel free to email us some details about your cycling app so we can investigate the other issues.
Great Heart Rate Monitoring App
Tttttttttisttttttt
I’ve used this for years, but the 2025 updates (AirPods Pro 3 support and haptic zone alerts) have made it even better. It’s reliable, private and keeps my Apple Watch or air pods at the center of my fitness data. Setup is quick and it has never dropped a connection during a long ride. The customer service is responsive and reliable. I just donated $100 to show my appreciation. There’s not many like this out there. 10/10.
Developer Response
Thank you so very much for your kind review and incredibly generous donation! 💙
Brilliant
long54
I’ve used HeartCast to connect my Apple Watch heart rate to Zwift, Peloton, MyWhoosh, and now Kinomap. It has gotten simpler and faster the past few years and, any time I’ve had issues, it was because of the other software I was connecting to. I didn’t want to buy a dedicated heart rate monitor when I already had an Apple Watch. When I couldn’t find any other solution, this was it and it continues to be the best solution for me.
Developer Response
Thank you so much for sharing this lovely review! <3
Bug fixes and improvements. Including: Your sensor choice is remembered.
Version 3.9.0
The developer, Logic Phase LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
VoiceOver
Larger Text
Dark Interface
Reduced Motion
Audio Descriptions
Information
Seller
Logic Phase LLC
Size
22 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.6 or later.
iPhone Requires iOS 18.6 or later.
iPad Requires iPadOS 18.6 or later.
Mac Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
