I have a scenario where a client needs to have an app to chat with someone without anyone else being able to know, cursorily, that an app is a communication app or has the ability to provide communication (text chat primarily).
A desirable example scenario would be a "game" (any kind of app really) that, when opened, there is a function somewhere that leads the user into a chat application where the user will be able to innocuously talk to someone else and then easily switch back over to the app's other functionality and then quit without prying eyes being able to EASILY get into the chat functionality. The chat should also have no history or be easily clearable.
Do any such apps exist?