This app was mentioned in 4 comments, with an average of 1.75 upvotes
If you're into anime, manga and that whole aesthetic, Pixiv is a good community (website, App). They've even got their own Sketch app (which you don't have to use).
A lot of the Note8 users seem to really love Infinite Painter due to the robust nature of the app and the fact that it makes full use of the S-Pen. It does have a community but I don't know how good it is (due to me not having really participated). I've used the app though and it is definitely very solid.
If you're on Android, the pixiv app is pretty good.
https://play.google.com/store/apps/details?id=jp.pxv.android
Or… it's not available in you country which sucks since I also use a VPN to access Reddit
Not sure about iOS but Android had an app