Confide

Confide is an app that supposedly offers completely secure and self-destructing messaging, with no way of saving a copy of anything so that the content of messages remains "off the record". Even attempts to take a screenshot are supposedly defeated. (But what about taking a picture of the screen with a different camera or device?)

Messages are end-to-end encrypted, and can be sent to a phone number or e-mail address.

Links

 * Official site
 * iOS version (App Store)
 * Android version (Google Play Store)
 * The app that could have prevented Chris Christie's traffic scandal