The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Calogero Sanfilippo:
CardStore allows you to save the bar codes of all your loyalty cards inside your iPhone.When you have to show your loyalty card, simply launch the application, choose the loyalty card and switch your phone over the barcode reader.The high-resolution screen of the iPhone guarantees maximum image quality and no barcode reader will have trouble reading the code.The codes supported by the application are:- QR Code- Aztec- EAN 13- EAN 8- Code 39- Code 93- Code 128- PDF 417- UPCE- DataMatrix (only iOS 8)- Interleaved2Of5 (only iOS 8)