Sudoku 81
81 squares, 0 ads, ∞ logic
Archived App (Last seen on 13 May 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Enjoy classic Sudoku puzzles with a clean interface and unlimited free play on the easiest level. Unlock all difficulty levels with an optional upgrade. This game is always ad-free.
What's New in Sudoku 81
2.0
February 3, 2026
Landscape support for iPad
Subscription plans
Weekly
Unlock all levels
In-App Purchases
$29.99
Lifetime
Unlock all levels
Developer apps
FAQ
What is Sudoku 81?
Sudoku 81 is a classic Sudoku puzzle game with a clean interface. It offers unlimited free play on Level 1 and an optional upgrade to unlock all six difficulty levels.
Does Sudoku 81 have ads?
No, Sudoku 81 is always ad-free, providing an uninterrupted puzzle-solving experience.
How much does Sudoku 81 cost?
The app is free to download and play with unlimited puzzles on Level 1. An optional upgrade is available to unlock all difficulty levels, with subscription plans starting at $0.99 weekly or $9.99 annually.
What are the subscription options for Sudoku 81?
Sudoku 81 offers a weekly subscription for $0.99 and an annual subscription for $9.99, which includes a 3-day free trial.
What age rating is Sudoku 81?
Sudoku 81 has an age rating of 4+, making it suitable for a wide range of players.
What devices support Sudoku 81?
Sudoku 81 is available on iPhone and iPad devices.
How often is Sudoku 81 updated?
The latest version, 2.0, was released on February 3, 2026, indicating active development and updates.
What learning methodology does Sudoku 81 use?
Sudoku 81 focuses on developing logical reasoning and problem-solving skills through its classic number puzzle gameplay.