I see that the blog has come out about the official application.
Please read the body of the blog to learn more about what the Mastodon Project intends to do.
https://blog.joinmastodon.org/2021/02/developing-an-official-ios-app-for-mastodon/
I've been repeatedly asked, "Where's the Mastodon app?" even though I've provided links to the app in various places.
The lack of an official app makes it difficult to find an entry point for Mastodon and gain a competitive edge in the app store trend.
Existing apps mainly target existing users and do not provide better support for new users.
Functions provided as APIs and functions that can be handled from the WebUI are often not available in apps.
To create opportunities for competitive third party apps (with superior design and functionality) to gain users from the expanded pie (increased users) of official apps.
Provide open source and free reference apps.
I think these are some of the key points.