this is a dog, scam likely

Everyone go download "Simon Tatham's Puzzles" by Chris Boyle

Here is a Play Store link:

It contains pretty much any famous puzzle I've ever known, with the exception of riddle-based or language-based puzzles. All puzzles are automatically generated by your phone, and highly customizable in difficulty, size, and other variables. Note that the puzzles often have other names than they classically have (e.g. Sudoku is named "Solo"), but almost everything is in there.

The app is free, it is ad-free, doesn't necessarily look pretty but is very functional! Also bc it's all randomly generated on your phone, you don't need to give it access to internet at all! And you get infinite puzzles! And it doesn't ask you for personal info, you don't need an account, they don't want to "send your information to the developer to help develop the app/sell to third parties".