Problems right now -
from the user's point of view, when the user wants a wallpaper app he/she can use it in 4 ways,
1 - to set wallpaper on the home screen,
2 - to set wallpaper on the lock screen,
3 - for both screens
4 - if they wanna download that wallpaper on their phone.
But right now they are getting only one option, which is home screen one
Suggestion -
you can give all these 4 options after clicking on the set wallpaper button from which users can choose what they want to do with that wallpaper
The project is very good. Thanks for that.