GPS Speedometer App funktioniert nicht

It also shows average speed, total distance, maximum speed, stop time and actual trip time taken by you , your car, your bike , etc. ◆ HUD(Heads Unit Display) helps you to use GPS Speedometer in car windshield.  This app is very helpful for those who have a broken speedometer or odometer in their car, bike or other vehicle. ◆ This Speedometer app has 3 speed units - MPH, KMH, KNOTS. ◆ Digital speedometer not only shows your current speed.  Alert Sounds and Vibration will inform your if you drive more than the specified limit. ◆ Compass function lets you to see where you are pointing at. ◆ All trips are automatically saved and can be viewed at any time. ◆ App allows you to share your trip info easily. - "Speedometer” is free to download.  Speedometer is used to measure car, bike, walk, run, boat, bus, train and bicycle speed.  You can change the colors of the display. ◆ You can set maximum speed limits to make sure you do not get too fast.  It contains preferable auto-renewing subscription options for Unlimited Use. - Once you subscribe to any of your preferable options, you can enjoy all the features of the app. - Payment will be charged to iTunes Account at confirmation of purchase. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.