It uses 128-bit AES with a key that is randomly generated on the first launch to store the passwords encrypted in a QR Image.
The image can be stored on the phone, printed an sticked on the computer, in any place that you can scan it to see the passwords.
You can import/export the encryption key to use it with any number of devices
It uses some ZXing libraries and the ZXing Barcode scanner
The code is on github
I cannot put a link yet till i get 10 posts
Google Play: https://play.google.com/store/apps/details?id=com.qrpasswds