Never trust any app that says it can do "end-to-end encryption," if you analyze the words themselves it's clear after a moment of thinking there's no way for an app to do it
Discussion
why can't an app do that?
Calling it an app suggests it can run on many systems
It can't really stop the user's OS or hardware from watching what they do on their screen or even hijacking their keys
Can we not even trust Meredith & Signal? Although I wouldn't trust my phone - the place that displays all the data un encrypted, privacy sometimes feels unachievable when talking about electronic devices that connect to the Internet or even air gapped devices with that PowerHammer malware stuff 🥴
I don't know about Meredith but I wouldn't trust Signal or my phone 🤙
An air gapped wallet with hand written (or hand-hole-punched) data transfers should be pretty safe