Can the purchased maps be used in several devices ?

Yes,

if:

  • The devices are using the same system: either iOS or Android but not a mix of the 2
  • There are using the same store identifier as the one used for the initial purchase.
  • On Apple iOS, iCloud should be activated for Avalon. This needs to be done in the device general settings..

Then you just need to go in Avalon main menu parameters and tap on “restore purchases”.