scrypt-pwgen app for iPhone and iPad

Generate your passwords deterministically from a master password and copy them to clipboard or show them. No more synchronizing a password database between your devices! All you need is to remember your master password and the name of the site for which you want the password. From these two, your site password is generated using scrypt, a password derivation algorithm that is hard to crack because its computation is memory intensive. And because it is free software, you can also verify and build it yourself!

A command line version of this also exists at https://heap.zone/scrypt-pwgen/ that can be used to generate the same passwords on computers.