NM HRV

This application allows you to connect with and use Frontier X - a revolutionary new wearable device that monitors your lungs and heart. Once you download this application on your iPhone, this will allow you to view your real-time data if you exercise with the Frontier X device. 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 recording during Rest, Sleep and Activity.
Real-time vibration alerts when you cross your Heart Rate thresholds
Easy to use. Strap on and start. Sync later
View quick activity summary on device screen
Highly accurate Heart Rate data
Apps available for iOS.
IP67 Waterproof up to 1.5 M
Battery: 14+ days of typical use, up to 24-hrs continuous use