Sudoku by Joseph

Sudoku by Joseph — your one-stop shop for everything Sudoku. Built by solo indie developer Joseph Keitgen since 2011, this app has always been about one thing: giving you a focused, distraction-free Sudoku experience. No lives, no coins, no manipulative mechanics. Just pure puzzle solving.

With 12 puzzle variants, Sudoku by Joseph offers the most comprehensive Sudoku collection available:

• Classic 9x9
• Jigsaw
• Killer
• Twodoku (2 overlapping grids)
• Tripledoku (3 grids)
• Gattai3
• Sohei (4 grids)
• Samurai (5 grids)
• Cross (5 grids)
• Flower (5 grids)
• Kazaguruma (5 grids)
• 16x16 Sudoku

Every puzzle is crafted with care. Difficulty levels across all modes are based on pure solving mechanics — real technique-driven challenges, not artificial difficulty from simply removing numbers. Every puzzle guarantees exactly one solution. No guessing required.

Features:
• Daily Challenge with streaks
• 5 difficulty levels per variant
• 13 color themes with light and dark mode
• 14 symbol styles — play with numbers, letters, Roman numerals, emoji sets, or your own custom symbols
• Full landscape and portrait support
• Undo, hints, and error highlighting
• Localized in 46 languages

Celebrating 15 years, now on Google Play. Previously featured in Apple's "Test Your Brain" collection across 48 countries.

SUBSCRIPTION INFORMATION
Sudoku by Joseph Premium removes ads and unlocks all color themes, symbol styles, and puzzle variants. Two subscription options are available:
• Monthly: $0.99/month
• Yearly: $9.99/year
Payment will be charged to your Google Play account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your subscription settings in Google Play after purchase.

Privacy Policy: https://sudokubyjoseph.app/privacy
Terms of Use: https://sudokubyjoseph.app/eula

Recent changes:
What's new in 2026.18:
- New: Cell Coloring – mark cells in four colors for Simple Coloring (turn it on in Settings)
- Play in landscape on phones; the game adapts to foldables
- Video lessons on our YouTube channel, linked from Settings and the tutorial
- Export your statistics as a CSV file
- More reliable daily reminders and Daily Challenge streaks
- Re-graded Classic, Jigsaw and Killer puzzles
- Many fixes and accessibility improvements