13
Signal Usernames for DESKTOP + Monero Signal Groups
(monero.town)
This is the lemmy community of Monero (XMR), a secure, private, untraceable currency that is open-source and freely available to all.
Wallets
Android (Cake Wallet) / (Monero.com)
iOS (Cake Wallet) / (Monero.com)
Instance tags for discoverability:
Monero, XMR, crypto, cryptocurrency
Have your Mom try Session Messenger, it does not ask for an email or a phone number, and is a little less complicated than Matrix.