I don't know if anyone has done this yet so i'm gonna give it a shot.
There is an app called Amino for ios and android. Amino has a ton of communities for various interests like technology, anime, video games, 영화 and tv etc. In these communities 당신 can make blogs, polls, and favorites for all 당신 가장 좋아하는 things regarding that genre 또는 show. One of the particular communities is called Buffyverse where 당신 can discuss all things Buffy and Angel. I know that's what everyone already does here but this sis a mobile community that's a bit 더 많이 active.
So I just wanted to put this out there in case anyone was interested. Just download Amino and look for Buffyverse.