"Very secure. We are based on a new protocol, MTProto, built by our own specialists from scratch, with security in mind."

I do not think that is such a great idea. I still vote Threema: https://threema.ch/

Wow, never heard of it before today. This should definitely be promoted more! I was surprised there was only one old news here on HN. I submitted a new one: https://news.ycombinator.com/item?id=6913456

Wow, this sounds awesome. I hope it becomes popular :)