Yes, the use of the BikerSOS GPS tracker is bound to a BikerSOS Premium subscription.
If you don't have a BikerSOS Premium Subscription yet, you can simply complete it here:
my.bikersos.com/checkout
When activating the BikerSOS GPS tracker, you will be automatically redirected to this page in the app anyway.
Please do NOT purchase the BikerSOS Premium Subscription via the Apple AppStore or Google Playstore to use the tracker, but via our page linked above!