Numori is a free, ad-free logic puzzle game — similar to Sudoku, but with arithmetic operations. Fill the grid so that every row and column contains each number exactly once, and every cage reaches its target value.
Numori is also available as a web app: 👉 kaizo101.github.io/numori
Optimized for desktop and mobile.
- Every row and column contains each number from 1 to N exactly once
- Cages define a target number and an arithmetic operation (+, −, ×, ÷)
- The numbers in a cage must produce the target using the given operation
- Procedurally generated puzzles — unlimited unique puzzles
- Grid sizes: 3×3 to 7×7
- 3 difficulty levels (Easy, Medium, Hard)
- Puzzle IDs — share and replay specific puzzles
- Android APK — optimized mobile layout with touch controls, status bar with move counter and copy button
- Local leaderboard — best times per grid size and difficulty with name, time, moves and date; gold/silver/bronze ranking
- DE/EN localization — automatic language detection, manually switchable in settings
- PDF export — save puzzles as blank A4 PDF for printing
- 4 themes — Classic, Numori Dark, Console, Flipper
- Daily puzzle with weekly schedule and best-time tracking
- Auto-save and restore game state
- Win banner with confetti and statistics (size, difficulty, time, moves)
- Error indicator when all cells are filled but the solution is wrong
- Instant validation (V key)
- Notes mode (N key)
- Hints
- Undo/Redo
- Full keyboard navigation
- Number pad overlay — complete mouse control without keyboard
- Music player — chiptune background music (Console theme)
- Statistics — best times, average time, solved puzzles per size and difficulty
- Interactive tutorial — step-by-step introduction to the rules
- Automatic updates via Electron
- Adjustable font size (small / medium / large)
- Imprint & privacy notice in settings
Numori offers four themes, selectable via settings. Your choice is saved.
- Classic — warm, light design with Georgia font and beige background
- Numori Dark — dark design inspired by the app icon, blue-grey palette, Poppins font and gold accents in the win banner
- Console — retro CRT aesthetic with phosphor-green text, scanlines and Matrix animations. ACCESS GRANTED / ACCESS DENIED as win screen.
- Flipper — pinball dot-matrix aesthetic with amber palette, Bitcount font and a scrolling high-score ticker in the header.
| Key | Action |
|---|---|
| Arrow keys | Navigate cells |
| 1–9 | Enter number |
| Del / Backspace | Clear cell |
| N | Toggle notes mode |
| V | Toggle validation |
| Ctrl+Z | Undo |
| Ctrl+Y | Redo |
| Enter | Load puzzle ID |
- Supabase integration — optional user accounts; cross-device sync of statistics and unlocks
- Global leaderboard — enabled once a sufficient user base is reached
- Badges — rewards for special achievements
- Share puzzle — share puzzle ID via system share dialog (APK)
The Android folder is not included in this repository but can be reproduced from the source:
npm install
npx cap add android
npx cap sync android
# Then open in Android Studio or:
cd android && ./gradlew assembleDebugRequirements: Node.js, Android Studio with SDK.
Numori is licensed under the GNU General Public License v3.0. See LICENSE for the full license text.
Developed by Lukas Schäfer — feedback and contributions welcome.
Used in the Numori Dark theme (assets/fonts/Poppins-Medium.ttf, assets/fonts/Poppins-Italic.ttf).
License: SIL Open Font License 1.1 Copyright: © 2014–2020 Indian Type Foundry
The full license file is located at assets/fonts/OFL.txt.
Used in the Console theme.
License: SIL Open Font License 1.1 Copyright: © 2015 Peter Hull
Used in the Console theme.
License: SIL Open Font License 1.1 Copyright: © 2012 Carrois Type Design
Used in the Flipper theme (assets/fonts/BitcountGridSingle-Regular.ttf).
License: SIL Open Font License 1.1 Copyright: © 2024 Petr van Blokland
Used in the toolbar (inline SVG).
License: ISC License Copyright: © 2022 Lucide Contributors