Frontier X

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 fourthfrontier.com. 

Frontier X integrates with HealthKit to export your Frontier X activities into the Health app and to read heart rate and biometric data.

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
Real-time vibration alerts when you cross your Effort and Strain thresholds
Accurate internal training load computation spanning all exercises
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