Kool. Am building an sms app that don't required Internet. Its gonna be excited.
Sorry to tell you this, since your first idea has been change due to the comment above and frankly if your going to make an SMS app that uses
BTCitcoin for sending a message to someone (something like they register for unlimited amount of messages for a fee) then I think people won't use that either since someone did that in the past (can't find the thread) and few only used it for a test and then nothing really happen...You mentioned it doesn't require an internet, so would it be totally free or it would be the one I mentioned earlier?