This is a utility for generating and retrieving passwords. It lets you enter a graphical pattern using a 4x4 dot grid and a plain text seed word (like "facebook", "work email" or whatever makes sense to you), and then generates a password based on this unique combination. The idea is that these patterns and the plain seed words are much easier to remember than a good "random"-looking password.
As long as you enter the same pattern and seed word the generator will always output the same password. But any change in either results in a completely different password. So you can decide on one pattern and reuse together with different seed words for different accounts, and get good different passwords for each account. As long as you remember the pattern you've chosen and the plain text seed words for your accounts, you can get your passwords back. But unlike other solutions your passwords are never stored on your device or sent over the net, so there is no password information in the app that can be stolen or lost.
There is also a Mac OS X version of DotPass available in the Mac App Store. So you can easily access to the same passwords on your mac as well.
To make these passwords secure you must of course keep your pattern and seed words secret, just as you would with your password. If you are worried about someone looking over your shoulder you can use the extra privacy features in the app to hide the pattern, seed or password after entry. For added security the app automatically resets if left in the background more than a minute.
For a more in-depth security discussion go to