Catchy Password app for iPhone and iPad

Catchy is the simplest way to generate a secure, memorable password.

Catchy picks 4 words at random from a set of 10,000 common English words, so it can generate 1e16 (10,000,000,000,000,000) different passwords, which is about 14 times larger than the set of random, 8-character alphanumeric passwords. An adversary that can try 1000 passwords per second would take more than 300,000 years to try all of those passwords.

Catchy only uses common words, creating passwords that are easy to remember and easy to type. The human brain can easily retrieve four words - as soon as you read them, you can use sounds, images and familiar concepts to remember them all.

Catchy never saves a password, so your secret can remain stored safely in your memory.

For a graphical explanation of the principles behind Catchy, take a look at https://xkcd.com/936/.