Nonogram
puzzles
31,000 hand-crafted nonograms across 1,500+ themed collections. From 5×5 warm-ups to 45×45 marathons. No ads, ever.
An antidote to the
infinite scroll
Nonograms — also called picross or griddlers — are Japanese logic puzzles. Number clues describe rows and columns; you reason your way to a hidden picture. Pure deduction, no guessing.
15 quiet minutes a day, instead of the feed
Sustained focus, logical reasoning, pattern recognition. The kind of attention that scrolling slowly erodes — picross asks you to rebuild it, one solved cell at a time.
1,500+ themed sets
Animals, nature, architecture, abstract art. Four difficulty tiers — Easy through Expert — and 16 badges to chase along the way.
No banners, no notifications, no nudge
Premium, fully ad-free. Works offline; iCloud sync across iPhone and iPad. The only thing competing for your attention is the puzzle.
About nonograms
What is a nonogram?
A nonogram is a Japanese logic puzzle. The number clues along the top and side of a grid describe the lengths of filled-cell runs in each column and row. You reason out which cells must be filled — no guessing required. They are also called picross, griddlers, or hanjie.
How do I solve a nonogram?
Start with the rows or columns whose clues sum to nearly the line width — overlap reveals guaranteed cells. Mark known-empty cells with an X. Cross-reference rows and columns. The line-by-line method is a calm, deduction-only path to the solution.
Is the app free?
Yes. You can play hundreds of puzzles for free. Premium unlocks all 31,000 puzzles, ad-free for as long as you keep the app.
Does it work on iPad?
Yes. Nonogram Zen is built for iPhone and iPad. Progress syncs across devices via iCloud.
Are there ads?
No banners, no interstitials, no nudges — ever. The app is supported by an optional subscription, not advertising.
Begin where
you are
Free to try. Premium unlocks all 31,000 puzzles.