What are 3 mobile apps you wish existed but don't?

1. A peer-to-peer Twitter. Each app is a server and client.

- Messages travel from client to client unless there are no clients detected within X minutes.
- User addresses would be random and prohibitively long such that it would be difficult to spam users.
- Users can set messages from unknown users to be flagged.
- Users can flag message senders as positive or hostile. The good/bad ratio could serve as a warning.
- Users can flag messages as illegal content. Users abusing this flag will be banned. Legitimate flagging would go to the authorities.
- Operating as a mobile mesh network, the system would be extremely hard to censor and resilient to disruption.

2. I thought I was responding to your question.

3. How does this work?