@quandoquando What about:* Connect your phone to a Wifi endpoint created from your computer (requires to two internet interfaces, 1 to emit the Wifi endpoint, 1 to still receive internet)* Start wireshark (https://www.wireshark.org/) to spy on network requests from your phone* Start the app* Watch for network requests from your phone to see if they point to something that looks like mp3

@Piracy