[eitland]

> Without being able to audit their server though, we have no clue if 'disappeared' chats and messages are actually scrubbed from their server.

Automatically disappearing messages are only available in "secret" chats and those are end-to-end encrypted.

[HunOL]

There is possibility to set self-destruct timer for photos you send.

[eitland]

You are right. I forgot that. I guess that is not end-to-end encrypted in regular chats.