Threema is a mobile messaging app that puts security first!
Threemaplay.google.com.threema With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages. Unlike other popular messaging apps (including those claiming to use encryption), even we as the server operator have absolutely no way to read your messages.
End-to-end encryption of text messages, images, videos and GPS locations
Contact synchronization (optional): find other Threema users automatically
Send images and videos
Share your location on a map
Verify your contacts’ public keys by scanning a QR code from their mobile phone, all within the app
Threema is Made in Switzerland, and all servers are hosted there as well for maximum privacy.
What’s in this version :(Updated : May 30, 2013)
Fixes: setting silent notification tone, emailing received photos (filename), mobile number linking when using international format, fallback to port 443 if default port doesn’t work
Added support for tablet devices and fixed error 291