Hi there.
I'm the creator of Wallhavener - an unofficial app for wallhaven. Thank you everyone for making such a wonderful website. I will be posting updates here.
I have a discord server for downloads and discussions related to the app. Discord: https://discord.gg/GKW2dbkhSj Playstore: https://play.google.com/store/apps/details?id=com.entitydev.wallhavener
Note: API key is required even for Sketchy purity filter to avoid google rejecting the app.
Preview:
If you have any suggestions, you can write them here.