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.
How to use this app to perform magic:1.Make setting Hide Compass on2.You and Your Friend face to face3.Open this app to input some words and press left button to encrypt4 Press "key" button to decrypt, means you can decrypt5 Encrypt the text again and pass your iPhone to your friend6 Your friend try to decrypt the message, but failedMagical thing happened !!Of cause, it's the compass contribution!