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Sudoku & Killer: SudoKoi

Sudoku & Killer: SudoKoi

No Ads. Logic Puzzles. Minimal

61 ratings
19 reviews
🎮 Games
🎲 Board
🧩 Puzzle
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 21, 2020
  • March 7, 2026

Features

Developer

Fabian Zwick
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iphone
ipad
🧾$24.99
In-App Purchase↘︎
⭐19
Reviews↘︎
🔄6+ apps
Alternatives↘︎
❓8 answered
FAQ↘︎
📦~ in 1 month
Updates frequency↘︎
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Icons↘︎

About

Enjoy classic and killer Sudoku puzzles without ads or interruptions. This app offers a clean interface with multiple difficulty levels, smart notes, and the ability to scan puzzles from paper. Play offline and track your progress, with an optional upgrade for thousands of additional puzzles.

✓Classic and Killer Sudoku
✓5 difficulty levels
✓Smart notes and candidate tracking
✓Scan printed puzzles
✓Offline play
✓Progress tracking
✓Play up to 9 games at once
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What's New in Sudoku & Killer

1.4.2

March 7, 2026

This update fixes an issue with the timer. If SudoKoi has become part of your daily routine, a quick review helps more players find us — and means a lot to a small indie team. Thank you.

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Subscription plans

SudoKoi+

Unlock access to thousands of Sudokus.

$0.991 Month
How to cancel Sudoku & Killer subscription ⁉️
1

In-App Purchases

$24.99

SudoKoi++

Unlock access to thousands of Sudokus.

User reviews

Most RecentHighest RatedLowest Rated

Sudoko

Es fehlen Vorschläge und Löschen alles nach dem ersten Fehler!
ChMJChMJ

Fantastic

I have been using this app for quite a while now. It’s never caused me a problem, It works and does what it should. I even add newspaper SudoKoi to the app, works every time. If you love doing SudoKoi puzzles you’ll love this app.
DogwizardDogwizard

My favorite sudoku app

Clean, good extreme puzzles, and killer mode. The automated deletion of notes is too helpful in normal sudoku, but I like it for killer sudoku. Snyder notations are a nice touch.
Allezàl'AuditoriumAllezàl'Auditorium

Response from developer

Thanks for the kind words. The automated deletion of notes can be turned off in the settings. On the main menu tap on the info button in the lower left corner. Kind regards

Für Sudoku Liebhaber

Das ist wirklich dir beste App für Sudoku-Liebhaber.

Simpel aufgebaut und per Stifteingabe spielbar. Absolut das was ich gesucht habe. Man kann auch Fotos von einem Rätsel machen und es dann in der App lösen.

Dafür habe ich mir auch sofort die Plus Variante gekauft. Hatte zwar ein Problem, aber der Support hat direkt weitergeholfen.

Perfekt!! ❤️🤩
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K_TTYK_TTY

really good potential

this app is designed really well, just missing settings that other apps have, such as "disable highlighting rows/columns/boxes" or "show errors" which i prefer to play on. i'll probably stick with another app unless this one adds settings so you can pick your preferences
Jan 6 2015Jan 6 2015
See 14 more reviews

FAQ

Does SudoKoi have ads?

No, SudoKoi is designed to be completely ad-free. The developers emphasize a puzzle-focused experience without interruptions, and the app has a 'hasAds' value of false.

What is the price of SudoKoi?

SudoKoi is free to download and play with a selection of puzzles. An optional subscription, SudoKoi+, is available for $0.99/month or $7.99/year, unlocking thousands of additional puzzles.

Can I play SudoKoi offline?

Yes, SudoKoi is fully offline. You do not need an internet connection to play any of the puzzles, making it convenient for on-the-go gaming.

What devices does SudoKoi support?

SudoKoi is optimized for Apple devices, including iPhone, iPad, and Mac. It also supports iPod.

How often is SudoKoi updated?

The app was last updated on March 7, 2026, indicating recent development. The latest version is 1.4.2.

What age rating does SudoKoi have?

SudoKoi has an age rating of 4+, making it suitable for a wide range of players.

What makes SudoKoi different from other Sudoku apps?

SudoKoi focuses on a minimalist, ad-free experience with no paywalls or dark patterns. It offers both Classic and Killer Sudoku, smart features, and the unique ability to scan printed puzzles.

What are the SudoKoi+ subscription options?

SudoKoi+ offers unlimited access to thousands of handcrafted puzzles. You can choose between monthly ($0.99/P1M), yearly ($7.99/P1Y), or a one-time lifetime purchase option.