Paper Sudoku: Classic & Killer

Paper Sudoku: Classic & Killer

Logic puzzles for Apple Pencil

1.4K ratings
103 reviews
Free
In-App PurchasesWith Ads

Details

Released
June 24, 2021
Updated
October 21, 2026
Paper Sudoku: Classic & Killer video #1 for iPad
Paper Sudoku: Classic & Killer screenshot #2 for iPad
Paper Sudoku: Classic & Killer screenshot #3 for iPad
Paper Sudoku: Classic & Killer screenshot #4 for iPad
Paper Sudoku: Classic & Killer screenshot #5 for iPad
Paper Sudoku: Classic & Killer screenshot #6 for iPad
Paper Sudoku: Classic & Killer screenshot #7 for iPad
Paper Sudoku: Classic & Killer screenshot #8 for iPad
Paper Sudoku: Classic & Killer screenshot #9 for iPad
Paper Sudoku: Classic & Killer screenshot #10 for iPad
🖼️Get Icon
Icons↘︎

About

Experience the tactile joy of pen-on-paper Sudoku with this digital app. Enjoy unlimited puzzles, auto-fill notes, and an interactive solver. Designed for Apple Pencil, it offers features like pencil marks and error checking for a seamless solving experience.

✓Unlimited Sudoku puzzles
✓Pen-on-paper feel
✓Apple Pencil optimized
✓Auto-fill notes
✓Interactive solver mode
✓Pencil marks and highlighting
✓One-click error checking
Show original description

What users say about Paper Sudoku

See all reviews

What's New in Paper Sudoku

4.1.2

October 21, 2026

SCAN A PUZZLE FROM PAPER Point your iPad's camera at a puzzle in a book or newspaper and play it here. Tap Import puzzle on the home screen to start. PEN AND PENCIL Further refinement of pen and pencil appearance. OTHER IMPROVEMENTS Learn explains more killer sudoku moves, plus other small fixes from your feedback.

More
1

Subscriptions & In-App Purchases

$12.99

Premium version

Remove all advertising

Events

Read more about Learn Killer Sudoku

Learn Killer Sudoku

Outlined cages, a sum in each, your handwriting.

Sep 29, 2026 — Oct 26, 2026

User reviews

Awesome app! Just 2 suggestions…

Oct 2026 update: Still here and loving this app! Thanks to the developer for continuing to keep the app and options fresh!

Update: I wish I could give 6 stars. Hats off to the developer! The app was just updated and I saw that the pen colors were added and the backgrounds were fixed for dark mode! That was a real quick turnaround and it shows the care that goes into this app. I’ll be recommending it to my friends as well. 13/10!

really love how the app functions. It’s simple and I liked that there was a one time purchase rather than a subscription. Best app I’ve found for my Apple Pencil for sudoku! I would just suggest maybe 2 more pen colors? The white and blue can be hard to see. Finally, not all of the backgrounds show up which is disappointing because they look like they’d be cool! Otherwise, fantastic job developers.
Show more

Response from developer

Thank you for your feedback. In v2.7 (out now) I’ve added some more pen colours and improved visibility of the blue pen in dark mode. The backgrounds should now be fixed 🙂 Glad you’re enjoying the app!

Sucky Update

The difficulty levels weren’t fixed with the new update. Please fix

Better before

This game was better before they upgraded it. Even the “Very Easy” puzzles are too hard. I’ll probably quit playing it.

I don’t like the new update

Bring the old version back

A fun game

This is a great app, but can someone tell me how to get rid if this killer cage thing and get back to the classic version? It got switched somehow and I can’t switch it back.

Developer apps

User experience

🐞

Reported Bugs

3 issues

Crashes after latest update

Bug

Notes color issue

Bug

Handwriting recognition problems with new Apple Pencil

Bug
✨

Requested Features

9 requests

Ability to input own puzzles

Feature

More pen color options

Feature

Customizable Apple Pencil gestures

Feature

Multiple games in progress

Feature

Undo/redo functionality

Feature

Automatic note management

Feature

Highlight notes of the same number

Feature

Default note color option

Feature

Puzzle timer and stats tracking

Feature

FAQ

What is Paper Sudoku?

Paper Sudoku is a digital application designed to replicate the experience of playing Sudoku with pen and paper. It offers unlimited puzzles and provides the benefits of digital gameplay, such as auto-fill notes and error checking.

What are the key features of Paper Sudoku?

Key features include unlimited puzzles, an experience that mimics writing on paper, optimized use with Apple Pencil, auto-fill notes, an interactive solver mode, support for pencil marks and highlighting, and a one-click error checking function.

How much does Paper Sudoku cost?

The app is free to download and play, but it does offer in-app purchases. This means you can enjoy the core functionality for free, with optional purchases available for additional content or features.

Is Paper Sudoku compatible with my device?

The description specifically mentions it's designed for use with Apple Pencil, suggesting it is compatible with Apple devices that support this accessory, such as iPads. Specific iOS version compatibility is not detailed.

Who is Paper Sudoku for?

This app is ideal for individuals who enjoy playing Sudoku and appreciate the tactile feel of writing on paper. It's particularly suited for users with an Apple Pencil who want a digital yet authentic Sudoku experience.