The app needs to be open source. Being able to watch Kdrama and things like that will be nice to have but not really a big deal for me.
So far I have tried Saikou, Dantotsu and Mangayomi. Recently been having issues loading anime episodes in Dantotsu and Mangayomi. Saikou seems to be no longer maintained If i’m not wrong.
Please mention your recommendations in the comments. (Also if these apps use any extensions like Aniyomi/Tachiyomi does, please also mention your prefered one)
Edit : Latest version of Dantotsu and Mangayomi seems to be working fine.
Even when it is not focused on anime I think Stremio + the add-ons Kitsu and Torrentio (along with Real Debrid if you want the best experience) have a decent catalogue and good scraping results for anime.
Sadly Streemio is not available in my region.
Oh, I didn’t know, well, you can always sideload it I guess.