Which command messengers support automatic deletion of messages?

Question

Messengers

Hello!
Please advise a messenger that would be suitable for the following conditions:
1) Creation of group chats (and preferably group calls)
2) Automatic deletion of messages in a group chat after reading on all devices / servers (after some time)
3) Encryption of all correspondence / calls
4) Client support for PC\Android\iOS
5) It is desirable that the whole architecture is p2p and nothing is stored on third-party servers
In general, secret telegram chats are needed, but so that they are group and work on a PC client.
Thanks in advance!

Answer 1

You want a lot.
Write yourself.