Avalon Offshore does not charge directly its users. This administrative task is under Apple or Google management.
If you wish to cancel the automatic renewal of the Premium Option, you have to to your device store (AppStore or Google Play) then go to your account to manage your subscriptions.
From this menu, you can then cancel the automatic renewal. You will still be able to use the Premium Option until it expires.
However, the automatic renewal has 2 benefits:
- You cannot be subject to any price increase of this option.
- You cannot have any gap in case the option expires when you are at sea. (you will still be able lo load external grib files into Avalon Offshore)