Gregory's Server@Gargron The primary Mastodon iOS app is, as of this toot, 5th most popular for social networking in the US. That puts it above FB Messenger, Telegram, and Discord, and trailing Gas, BeReal, WhatsApp, and FB proper. The only publicly visible metric is the # of ratings (1.2k for Mastodon, 105k-xxM for the rest). A search for Mastodon, of course, brings up a plethora of alternatives clients also ready to go.
@Gargron To continue this thought, that's huge! Despite a low number of App Store reviews, which are not even solicited to my knowledge, Mastodon is crushing well-established platforms in a subtle but important scoreboard.
Reviews are up to 1.4k this morning and Mastodon is now 4th most popular.