That second bullet point set off my BS detector (and is where I stopped reading). No system on earth lets you reliably delete a message sent to another device over the Internet, after the fact. Neither can any such system reliably prevent users from sharing pictures that they can see on their device.

This site reads like an add for a perpetual motion engine.

Which is too bad, because open-source encrypted mobile chat is an interesting thing in and of itself, without impossible pie-in-the-sky claims.