This app was removed from the App Store.
iOS iPhone Social Networking
There are several existing chatting services out in the market with large user bases, however, many focus excessively on monetization while rarely on privacy and security issues, which I believe should have been protected long time ago.
LinChat is a secure chatting service that protect users' privacy. Furthermore, a lightweight social network is integrated, which allows users to post status, like or share status, and leave comments.