I like the fact that these are hand crafted puzzles with constructive hints to learn various sudoku techniques. However, I would like it if the hints were actually shown on the grid rather than just a plain piece of text. It happened more than once that the hint says something like "5/7 pair in c5r1r3", and when I look at my current state of play, I cannot see why there would be this pair at this place.Also, for that price I would have liked a decent iPad app with split view and so on.

This is Sudoku on the level I was looking for. But the design flaws drive me crazy1. The numbers 1-9 are placed at the bottom instead of above the grid. This often leads to mistypes. 2. Correctly placed numbers are not locked. They can be overwritten by a mistype. 3. Did you notice? Those hints are useless, because the grid can‘t be looked at anymore. „Continue“ closes the message and the board. You can only begin from scratch afterwards. Also, the hint should be made visible!4. I still have no idea what gives and takes stars. One time I have 8, then 3. Okay. 5. Too many tools, too few explanations. 6. I really feel the need to mention the badly placed numbers once more. Thank you for improving. Love from Switzerland!

Game 24 has erroneous hints