The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Chilly Zhong:
Want to know what does a 2D Code want to tell you? Want to encode your url, sms, telephone, email address or whatever text to a 2D Code so as to share these info easily? 2D Codec will lead you to the New Info Age of sharing everything via 2D code. What's in it? It has both a 2D code generator and a scanner:1. Code GeneratorIt can encode whatever text you input to a 2D QR code and you may show it to your friends and let them scan and see what does this code mean.2. Portable ScannerIt can scan any 2D QR Code via camera and it can recognize what kind of info it is, including plain text, url, sms, telephone, email. And you may open the url, send the message, make a call, send an email as soon as you finish scanning the code.Curious? Don't hesitate, step into the 2D Info Age and bring all your friends there with you.