I really like this secure Private Messenger

This is a very secure service that is simple to set up and use. I use it because its security features are much better than its competitors (like Whatsapp). The fact that it is NOT owned by Facebook or Twitter or any of the other big brother social software companies is a huge bonus, as well. You can communicate with one or many, send text, photos or video, and even make entirely secure VOIP phone calls. Highly rated by the ACLU and the EFF.

GeoEng51 about Signal - Private Messenger, v2.3.4