We want the agreement with the GDPR to comply with the new rules. In order for the application to work properly and to display at least a non-personalized advertisement, so was still free of charge, it is necessary to give consent to points 1,2,7,9,10 and at least one supplier of advertising (set consent for one of the vendor's preferences).
Both devices must be connected to the Internet via Wi-Fi and must be in the same network on the same router with the same SSID.
On devices with Android (8) Oreo and larger, permission must be enabled for positioning using an internet connection.