Demo application that shows how unique your wallpaper image is.
Source code is open, see it at:
https://github.com/fingerprintjs/android-wallpaper-id.
Read article about identification using wallpaper image at:
https://fingerprintjs.com/blog/wallpaper-id
This demo application was developed only for research purposes. It generates an accurate cross-app identifier by checking wallpaper images on your device. Works on every Android version starting from 5.0 and doesn't require any permissions.