FREE version only supports up to android 10. PRO version supports higher android. https://play.google.com/store/apps/details?id=com.supergbc.pro HOW TO RESTORE saved states of FREE version to PRO: Please use X-plore File Manager, go to the directory of FREE version: /Android/data/com.supergbc.free/ then copy its contents to the directory of PRO version: /Android /data/com.supergbc.pro/ - A GBC game file (ROM file) is necessary to play a game. - Copy your own GBC game files to SD card or Internal Memory. (e.g. /sdcard/GBC/) - Please search games again after copy new GBC game files. - Support GB/GBC file (.gb, .gbc, .zip). - Support Rewind (Your character will never die when this feature is enabled). LEGAL: This product is not affiliated with or endorsed by Nintendo in any way.