Since JSQR generates the QR codes on your computer, no data are submitted and stored on my webserver. Additionally, this allows realtime preview and even works if you aren't online.
For the search types "Exact Package Name" and "Show the Apps Detail Page", you'll need to enter the application's fully qualified package name (e.g. com.android.example).
How to find your PIN: - Open a new email message - Type mypin (no spaces) - Hit enter which will generate your PIN
To scan the codes, I recommend the free decoder software Qrafter (Kerem Erkan • Apple AppStore), QR Reader for iPhone (TapMedia Ltd • Apple AppStore), Scan (QR Code City, LLC • Apple AppStore), or i-nigma (3GVision • Apple AppStore, Android Market).