Anonymous - all the other messengers make you identify yourself.
Language Translation - nobody else does that.
Safety - can't steal data off your phone - nobody else does that.
And of course: end-to-end encryption, stealth no-trace messaging, and total privacy.
All the details and the proof are at: http://www.deanblakely.com/AnonymousMessengerOverview.pdf
Just released December 2015