Recently the Mastodon project launched a first-party iOS app. The app’s visual design itself is mostly uninteresting, it looks like a clone of the first-party Twitter iOS app (not a bad thing) and covers most of the basic functionality of the Mastodon software.
What is interesting however and what has caused a great deal of consternation and frustration among certain segments of the fediverse is what is missing. The current version (as of July 31, 2021) is missing two basic features that are currently present in the official Mastodon web app and in other third-party iOS and Android applications.