I've enjoyed using Artemis even though I can't login through it (I'm on kbin). It's been interesting to be a pure lurker instead of an avid commenter like I was on the former site. In the past couple of days, though, Artemis has failed to fetch any new content. Deleting the iOS app and reinstalling through Testflight does nothing; the 1-2 day old posts pop right back up and nothing new will come in.
At this point the question has to be asked: is work on Artemis still proceeding? Aside from a few drips and drabs Hariette hasn't been heard from in at least a month. I really hope the dream of an Apollo-like fediverse app -- which Artemis was already previewing very well for us -- isn't dead.
My iOS app won't work anymore but I'm trying to be patient and understand that it's an open source project led by one person so there may be delays or issues that prevent progress or even things running smoothly. Hopefully it will return and improve with time.