I use it a lot with my friends (Signal) when speaking in very sensitive subjects instead of deleting messages manually you just make sure that messages will not

I use it a lot with my friends (Signal) when speaking in very sensitive subjects instead of deleting messages manually you just make sure that messages will not be available after a specific time so you are safe if someone hacked your phone. and yes it's very useful if both parties agreed to it. is not security against the one who are chatting with but the one who might access your data one day.