I guess it's more asking what the alternatives could be. I don't have the answer, and truthfully don't have much of an idea what is out there to solve that problem.
Is there a system that can get information to someone, maintaining anonymity for the sender the whole way through? Like having an open drop box where you'd be able to put whatever documents you want into it.
There are a ton of things you can do with a keyboard natively on Android. I would imagine these use that plus a bit of software to emulate "real" movements, like the flicking down to scroll