There are two parts to App Inventor iOS support. The first part is the companion, which is available in the App Store. We understand it has problems and we are working on addressing those. The second item is the build capability, which unfortunately has been on the back burner due to other higher priority projects (read: projects that pay the bills). We are anticipating doing a significant update to the iOS companion this summer. I have also been working on updating the iOS build server but do not yet have a good sense of when the next update for that will come.