The status of TextSecure on iOS is that a new WebSocket based message transport bus needs to be implemented on the server and client side. Text Secure for Andr

The status of TextSecure on iOS is that a new WebSocket based message transport bus needs to be implemented on the server and client side. Text Secure for Android uses Google's Push Messaging Service which queues messages when devices are offline for transport. Apple's push messaging service can't be used in an analogous way because it only delivers the most recent message when a device comes online. You certainly could help with the server side work. Otherwise, the UI, crypto etc... of the iOS app is all done.