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. So as long as you remember the pattern you've chosen and your seed word, you can get your password back. But unlike other solutions your passwords are never stored on your device or sent over the net.
Single pattern use
An easy way to use this is to design a single secret pattern that you remember, and use this together with easy to remember plain text seed words like "work email", "school" or "domain.com" to generate hard to guess different passwords for all your accounts. This way all you need to remember is your pattern, and you'll be able to get your passwords back if you need them again. When it's time to change your passwords you can just pick a new pattern and generate new passwords using the same plain text seed words.
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 privacy settings in the app to hide the pattern and seed after entry. For added security the app automatically resets the pattern and seed if left in the background more than two minutes.
For a more in-depth security discussion and answers to some common questions go to the:DotPass security discussion