In the early days of Android, I downloaded one of Amazon's free apps of the day by the name of "Enjoy Sudoku." This was the perfect sudoku app, great gui, all kinds of lessons about advanced techniques and such.
Now, on my new phone, I cannot find this app any longer. Amazon app store is gone, and it seems to no longer be on Google Play either.
Clues I've found are the Enjoy Sudoku website, where I learned the developer's name was Jason Linhart.
Searching online, I can find other references to this app, as well as a download page on cnet (that links to Google Play and no longer works.)
Also, searching on Jason Linhart on Google Play turns up only Sudoku results, but I don't think any of them are an updated version.
Any thoughts on this? It seems like it must not be maintained any longer, but I wonder if it could still run it if I could find it.
Seems to be available on APK pure (both free and paid) but that depends on if you trust that site and if it can even run on modern android versions. Seems you can also find an email at the bottom on Jason's Enjoy Sudoku website, emailing them might be an option. You could try crawling through Github, maybe there's an old repo or something under a different name there.