GO HeartRate Pedometer Fitness funktioniert nicht

Messages are encrypted & expire. *GO Real-Time Follow & Monitor Me Subscription $1. 99/mo-This subscription allows you to invite others to follow & track your fitness activity in REAL-TIME! *GO Track & Share Tools $1. 99/mo-Allows the app user to view & compare previous workouts or specific date & times.  The only fitness tracker that allow you to compare workout & activity metrics! *GO Connect! Subscription $3. 99/mo-This subscription allows you to connect with other fitness enthusiasts via unlimited text messages & photo sharing.  GO is a FREE Heart Rate Monitor, Fitness Tracker, Activity Tracker, Workout Tracker & Steps Pedometer.  Any unused portion of a free trial period, if offered, will be forfeited if you purchase a subscription to that publication. 
 Payment will be charged to iTunes Account at confirmation of purchase.  The must-have fitness tracker allowing quick & easy access to your most essential activity, fitness & workout metrics.  Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.  If a subscription price does change auto-renewal will automatically be DISABLED & you'll need to manually renew your subscription at the new subscription price.  Save & share your workouts with other fitness enthusiasts.  Discover other fitness enthusiasts via GO Connect!  Account will be charged for renewal within 24-hours prior to the end of the current period, & identify the cost of the renewal.  Follow & compare your workout activity with others.  Subscriptions are user managed & auto-renewals are turned off in the user's Account Settings after purchase.  Subscription prices may change without notice.  Cancellation of the currently active subscription is not allowed.  It uses your iPhone's (& Apple Watch's) built-in pedometer as a steps counter, floors climbed & distance walk/run.  You'll be able to view your Heart Rate's average, min & max for a variety of past & present time frames.