The app connects to the text display WiFi network and displays a local website with the song lyrics.
If you have connection problems, first connect the WiFi network of the text display via the Android WiFi settings and then via the app. If asked that there is no Internet access, keep the connection.
If the song lyrics fail on Samsung devices, then disable the following setting.
Android Settings-> Connections-> WLAN/WiFi ->
Intelligent Wi-Fi -> Detect suspicious networks
From Android 8 upwards the location have to be activated so that a WiFi connection can be managed via the app. Therefore, the authorization question for the device location (precisely when using the app) comes up during installation and you have to allow it. The location is not queried by the app and we do not collect any user data or statistics through the app.