This game randomly generates 9x9 Picross Puzzles for you to solve.
The number of extra hints used and the time taken to solve the puzzle is shown.
Source code: https://github.com/Chig00/picross2
This game is completely free. Not just free to download, not just ad-free, not just free of in-app purchases, but also free for you to download the source code and assets and modify and redistribute them as you see fit. Credit would be appreciated, though!