K.O. Nonogram Pro:
1. Permanent ad-free;
2. Unlimited prompts;
3. Unlock all selected puzzles;
4. Print all puzzles(no watermark in preview);
5. Cloud backup;
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Get nonogram answers / solving steps immediately.
It supports 5~50 grid nonogram.
There is a rich online nonogram store, support print puzzle.
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The grid of squares must be either filled in black or marked with X. Beside each row of the grid are listed the lengths of the runs of black squares on that row. Above each column are listed the lengths of the runs of black squares in that column. Go to find all black squares.