Apple Watch can alert you to start the right workout when it looks like you’re training and will even remind you to end the session if you forget. In case you don’t really need this handy auto-workout detection capability, disabling it will help prolong the watch’s battery life.
With this cool new app, you can record, save and view detailed sessions of heart rate data using HealthKit and without starting an active workout. Simply record sessions on your Apple Watch and view a detailed summary on your iPhone.
Third-party developers are now taking advantage of the built-in GPS and altimeter in Apple Watch Series 3, as well as custom workout APIs released in watchOS 4.2, to enable tracking of specialized metrics and the ability to find their friends on the mountain with a glance at the wrist.