I've joined ArtFol, and I'm looking for more mutuals. If you'd like to follow me, I'm @JimmyNijs on there! Feel free to share your handles, I'll make sure to follow you back. :)
App looks good so far, it's got a lot that I would want from an art-focused platform. My favorite is probably the fact that you can share art on a timeline like Twitter or Tumblr but you also have an Instagram-style art-gallery for yourself, which is great because you no longer have to worry that intensive reblogging will bury your own work beneath random posts.
Some cons are that at the moment it's extremely sluggish compared to some of the more popular apps and that you're limited to only 3 tags per submission, which makes it really hard to find stuff that might be a bit more niche.