If you purchased an In-App feature, e.g. the Premium Membership, it might happen that the extra feature is not activated yet.
If thats the case, you are able to restore the In-App purchase to activate your Premium Membership.
To do so, go to the settings of the app, choose "Runtastic" and then "Restore In-App Purchases".
Make sure to use the same Apple account you used when you purchased the extra feature the first time.