Ninefold

Ad-free Sudoku with 25,000 puzzles, daily challenges and Hell mode

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About Ninefold

Ninefold is an ad-free Sudoku game for players who want a relaxing daily habit and room to grow. Explore 25,000 puzzles across five difficulty tracks. Each puzzle is validated to have a single solution.

Play daily challenges, revisit puzzles by date, and push further in an endless Hell mode. Notes, hints and progress tracking help you learn at your own pace. Play offline on your phone or tablet, with versions for iOS, Android and HarmonyOS. Free to start, with optional premium upgrades.

Key features

25,000 validated Sudoku puzzles across five difficulty tracks
Daily challenges, date-based replays and endless Hell mode
Ad-free offline play with notes, hints and progress tracking

Yet to compete in a tournament

This product is queued for the next tournament.

Real Talkpizza.txt

Hi! Quick story about pizza and founders.

Our Premium pass costs $19. That's one large pizza.

You know what happens after you eat a large pizza? Nothing. It's gone. Maybe some regret.

But $19 on Premium? Your product gets a permanent dofollow backlink from a DR 73 directory. Featured on the homepage. A guaranteed tournament slot.

That listing stays there for years. The pizza? Gone in 20 minutes.

The price is identical. The value is not.

Launch your product, not your calories.

Get Premium — $19