I'm aware that it's best to stay the fuck off the phone but for those that still choose to do it I'm sure alot like Wickr or Signal.
Lets assume they are as secure as they say with no backdoors,etc.
How do they prevent Swype or other Keyboard apps from recording what is written?
How safe are both of these apps if the phone gets in LEOs hands. Does the destruction on both services really clear the messages or could they be gotten by Cellbrite or other tools?
Can Cellbrite break the password of Wickr? What type of security is supporting that password?
relevant:
http://arstechnica.com/tech-policy/2016/10/fbi-demands-signal-user-data-but-theres-not-much-to-hand-over/