Great puzzle game, but...
I had finished 50-odd puzzles in the free version when I bought the ad-free version... My progress did not carry over to the full version, forcing me to replay those puzzles. If you want a good nonogram game, this is your best choice, but try maybe one puzzle in free and then buy. Dont keep solving puzzles in free and then decide to buy, or you will be disappointed by having to redo them all.
Mordrach about
Logic Square+