Does not need an internet connection to create codes. All previously created codes are also available in the archive. Created Aztec Codes are fully compatible with our professional barcode reader app "Barcode Professional" https://itunes.apple.com/app/barcode-professional/id1075096265?l=it&ls=1&mt=8 and our free "Bar-Code" app https://itunes.apple.com/app/bar-code/id422314523?l=it&ls=1&mt=8 May contain ads