Hi Alex,
I have a go on your SudokuPro app on my laptop as I tried to download the app on my mobile phone and it pop up 'Under development'.
My feedback on my first hard SudokuPro that I cannot take one of notes' number off, e.g. 1,2,4 and I want to remove 1 but I cannot. If possible, to improve this by able to remove one of notes number please.
I like the appearance and it is very clear as well.
Keep up with good work
Amanda