> the only data there automagically gets removed within a week
Nice! To be clear, you can't count on the same thing happening on the other end of the connection due to various alternative Signal clients. This is kind of where Snapchat is king of the hill, but obviously nothing is perfect!
Snapchat APK can be modded, with root one can make screenshots and videos (I believe it is how some revenche porn is made). There's also analog screenshots (photos), and the end point (smartphone) can be hacked e.g. contain malware.
In my M.O. I assume the end point is not compromised and is honest; otherwise, whatever I write can be traced back to me.
Best thing would be not saying it, but if you were to make a good setup it wouldn't involve Android or iOS but something like Tails. And yet, we know deployed military in Ukraine don't use such. But what they do is better than analogue Russian on 8900 MHz.
Nice! To be clear, you can't count on the same thing happening on the other end of the connection due to various alternative Signal clients. This is kind of where Snapchat is king of the hill, but obviously nothing is perfect!