Gregory's Server
I've seen apps in TestFlight for 4 years before they get publicly released
Not saying thats how long the Pixelfed app will take, I'd rather go slow and carefully build a polished experience rather than rushing out something half baked with no or little input from the community.
@dansup You want to get all your ducks in a row before submitting it for final app store approval, too. If you're unlucky enough to get a reviewer who just decides they don't want to approve it, you may end up waiting another four years!