Source code and details: https://git.anarchists.space/nemesis/PixelCloak
Features:
- No permissions required
- Reduces effectiveness of reverse image search
- Randomizes filename
- Removes EXIF metadata
- Censors any detected faces — choose between black box or emoji overlay
- Emoji picker with 60+ emoji options for face censoring
- Written in Java


This app can come very handy sometimes. But it didn’t detect all faces in a group photo. There were 16 people in that group photo and 14 of them got their faces censured.
I understand that the app are in a early stage (v1.0).