"This is by far the best picross app..."
This is by far the best picross app across all platforms. It has expert feature which maximize your time and help you correct errors and compete puzzles in a timely fashion. I do wish it had better contrast between like colors, I also wish it had an ios implementation. I've used this app for years now and it just keeps getting better, there is no end to the puzzles. One gripe, is it would be nice to filter out puzzles that don't have a unique solution, I know I can work around it, but nothing frustrates me more than to compete a jumbled mess, because I found an alternative solution. Also, as far as I can tell there are some puzzles that cannot be solved logically. Maybe I'm missing something, but these puzzles sit unsolved near completion in my queue. I'm also not fond of triangle puzzles, because the solutions are usually trivial, and you have to switch your brush so frequently.