This application allows you to connect with and use Frontier X - a revolutionary new wearable device that monitors your lungs and heart and gives you real-time alerts as you exercise. Once you download this application on your iPhone, you can also use the accompanying application for the Apple Watch, which will allow you to view your real-time data if you exercise with the Frontier X and the Apple Watch. In order to use this application, you need to have the Frontier X device, available at The FrontierX Phone App is not using any health data from Health App. The FrontierX WatchApp is using a HealthKit workout session only to keep the FrontierX app running in Background mode during a workout. No data belonging to the User is being exchanged between the FrontierX app and the Health app.

The Frontier X is a chest-worn device that has the following features:
Suitable for Running, cycling, swimming and any other endurance exercises
Effort estimation based on Breathing Rate
Cardiac Strain estimation based on your EKG
Real-time vibration alerts when you cross your Effort and Strain thresholds
Accurate internal training load computation spanning all exercises
Ability to live-stream and record your EKG for up to 24 hours
Actionable training insights
Easy to use. Strap on and start. Sync later
View quick workout summary on device screen
Highly accurate Heart Rate data
Apps available for iOS and Apple watches
IP67 Waterproof up to 1.5 M
Battery: 14+ days of typical use, up to 24-hrs continuous use

What’s New

Version 9.1

- Now you can set your Workout Type before starting a workout.
- The Distance and Pace will now be available in Workout Summary.
- Bug Fixes


Fourth Frontier Technologies Private Limited
91.3 MB

Requires iOS 11.0 and watchOS 4.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Medical/Treatment Information
This app may use your location even when it isn't open, which can decrease battery life.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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