This app is for everyone who wants to use encrypting to hide very short texts using a restricted character set.
HandCryp is an utility program for encrypting and decrypting that can be made impossible to crack.
Unlike other such apps it is very simple and intuitive to use - there is actually a way to emulate it by hand without mathematical calculations as showed in a youtube clip referred to in the app.
A brief recipe about a way to produce a fake key (!) is also added - and how to use that can probably be found out from that recipe by a clever user (!).