Sudoku Players' Forum (clone)

I have been using the app from Sudoku.com, but have always suspected that it was buggy. Many times I have entered what seemed to be the logical solution for a cell, but it would result in an error. When back tracking, I would eventually arrive at the correct solution. However, I felt that I was being forced into a guessing situation. Normal?

Can you guys suggest a good app for iPad?

I'm looking for those apps too, I played in https://sudoku.com/ a lot of time and triedhttps://sudokupro.app, they are good for me, want to try smthg harder... If I will find something, ill reply here