This app can convert chess PGN files to a QR code and vice versa. You can print the QR codes or share them with other people as well. You can also share the converted PGN chess file with other people.
It can be very usefull to publish a QR code together with your chess game - for instance on a web page or if you are game is printed. Then others or yourself can easily get the entire game onto the phone by scanning the QR code, which will be converted to PGN.
It can convert most PGN files into QR codes, but if the file does not follow the proper PGN format, it cannot convert it. However, that is quite rare.
More features will be implemented if people support the app by buying it.