NumberPlaceQ free
Android
https://play.google.com/store/apps/details?id=com.blueqat.bq_number_place
iOS
https://apps.apple.com/us/app/numberplaceq/id1569547839
we have been working on generative machine learnibg for years.
Now we launched a smartphone app on iOS and Android platfotm.
The number of sudoku problem is now over 100,000 and increasing rapidly.
Lets enjoy your quantum life!