Mobile mesaging apps in crypto?

[vincentvincent]

What types of mobile messaging apps you know that do end to end encryption?

Thanks for your insights already

[Netnox]

Most popular one is GetGems with 100k downloads on Android and Ios http://getgems.org/

[klarki]

Messenger "Sender", in February introduced the encryption of messages using Bitcoin wallet, keys
https://play.google.com/store/apps/details?id=mobi.sender