This project is a messaging app built on IOTA. Messages are sent via Tangle transactions and are encrypted so only the recipient can read them. In addition, sender metadata is encrypted. So it is not possible for third parties to find out who is sending messages to a given a recipient. The only metadata that is exposed is that a given address has received messages from others. Ownership of an address may or may not be public information. That choice is made by the owner of the address, just as ownership of any given IOTA transaction can be publicized or not.
Right now this is a very basic app and so I am asking anyone who is interested to check it out and provide feedback. The plan is to of course eventually allow sending of IOTA through the app, but right now that functionality does not exist.