Classic 9×9 sudoku with shapes instead of numbers. A number-free puzzle that color-blind, dyscalculic, and minimalist players enjoy. Just shapes and logic.
form9 is sudoku, played with shapes. The same 9×9 logic you know — but every cell holds one of nine quiet silhouettes instead of a digit.
Nothing to read, nothing to count — just pattern and logic. That makes it a natural fit for people with dyscalculia, kids still learning their numbers, language learners, and anyone who simply thinks in shapes.
• A fresh daily puzzle, with a streak to keep
• Five difficulties — Easy, Medium, Hard, Expert, and Master
• Notes, undo, hints, and gentle error highlighting
• Colorblind-friendly by design — shapes carry the meaning, not colors. Nothing to toggle.
• Full VoiceOver support — every shape has a clear spoken name
• Optional color-hint mode for a redundant cue
• Reduce Motion respected
• No ads. No tracking. Ever.
form9 Pro (one-time purchase) unlocks:
• Expert & Master difficulty
• Statistics — best times, completions, hint-free streaks
• The daily archive — replay any past puzzle
Made by a solo developer who believes a good logic puzzle deserves a calm, quiet home.
Terms of Use: https://form9sudoku.app/terms/
Privacy Policy: https://form9sudoku.app/privacy
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A little update — still calm as ever.
• [FEATURE] Summer shapes — a second set of nine: sun, sailboat, watermelon and six more. Free for everyone, switch whenever you like in Settings.
• [FEATURE] A new home screen — it opens on today: the Daily Challenge up top with a peek at the board, your streak for the week, and a quick-play row for the level you played last.
• [FEATURE] A card that rotates through what's worth knowing — the new shapes, how you're doing, and settings you may not have found yet.
Version 1.0.5
The developer, Agata Raap, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Purchases
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More
Supported Features
VoiceOver
Dark Interface
Differentiate Without Color Alone
Sufficient Contrast
Reduced Motion
Information
Seller
Agata Raap
Size
8.8 MB
Category
Puzzle
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
