You are using an outdated browser. Please upgrade your browser to improve your experience.
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. The Frontier X is a chest-worn device that has the following features:Suitable for Running, cycling, swimming and any other endurance exercisesEffort estimation based on Breathing RateReal-time vibration alerts when you cross your Effort and Strain thresholdsAccurate internal training load computation spanning all exercisesActionable training insightsEasy to use. Strap on and start. Sync laterView quick workout summary on device screen Highly accurate Heart Rate dataApps available for iOS and Apple watchesIP67 Waterproof up to 1.5 MBattery: 14+ days of typical use, up to 24-hrs continuous use