I see many vendors using wickr, is just such a convenient way to communicate, its amazing.

I know they are open source and all that, but are they really safe as to be openly used by vendors?

I have heard that LE cannot intercept a message but that if you get arrested and they get physical access to your phone, then they can forensically extract deleted messages from the app. Anyone knows if this is true?

Most data I can find on the subject is outdated, back when they were not opne-source, etc.