Sudoku & Killer: SudoKoi

Name: Sudoku & Killer: SudoKoi
Rating: 4.8 (55 reviews)
Author: Fabian Zwick

No Ads. Logic Puzzles. Minimal

Free · In‑App Purchases

55 Ratings
Ages

4+
Years
Category

Puzzle
Developer

Fabian Zwick
Language

EN
+ 4 More
Size

36.3
MB

The cleanest puzzle app on the App Store — no ads, ever. Free to download, works offline, no account needed. Classic and Killer Sudoku in one place. 〉No ads. No paywalls. Just great puzzles. SudoKoi is the Sudoku app that gets out of your way. Open it, pick a puzzle, and play. No account. No loading screens. No interruptions — ever. Most puzzle apps are built around ads and dark patterns. SudoKoi is built around the puzzle. 〉Everything You Need. Nothing You Don't. • Classic Sudoku + Killer Sudoku in one app • 5 difficulty levels — Easy to Expert • Smart notes and candidate tracking • Helpful highlights and error detection • Fast, intuitive number input • Play up to 9 games at once • Scan printed Sudoku puzzles from paper • Track your stats and watch yourself improve • Share puzzles with friends 〉Fits Into Your Day Whether you have 2 minutes or 20, SudoKoi is there. Fully offline. No login. No loading screens eating your time. Optimized beautifully for iPhone, iPad, and Mac. 〉Start Free. Upgrade Only If You Want To. A handpicked selection of Classic and Killer puzzles is always free — no timer, no artificial limit. SudoKoi+ unlocks everything: • Thousands of handcrafted puzzles • Unlimited play across all packs • Monthly, yearly, or one-time lifetime options Privacy Policy: https://sudoku.efabian.me/privacy/ Terms of Service: https://sudoku.efabian.me/terms/

Ratings & Reviews

4.8

out of 5

55 Ratings

Very close to perfect
12/05/2020

jblundy
This is a wonderful app, and the only sudoku app that I’ve been able to find that supports writing in the numbers with the Apple Pencil. To push it over the top, I’d love to see some options in typography and contrast so that it’s a little easier to distinguish rows, columns, and boxes.

Developer Response
Thanks a lot for the kind feedback, I really appreciate it. I’m glad you’re liking the Apple Pencil support. I’ll consider your remarks on the readability for the next updates.
Very close to perfect
12/05/2020

jblundy

This is a wonderful app, and the only sudoku app that I’ve been able to find that supports writing in the numbers with the Apple Pencil. To push it over the top, I’d love to see some options in typography and contrast so that it’s a little easier to distinguish rows, columns, and boxes.
Developer Response 12/07/2020
Thanks a lot for the kind feedback, I really appreciate it. I’m glad you’re liking the Apple Pencil support. I’ll consider your remarks on the readability for the next updates.
Best Sudoku app for iPad
10/10/2023

P-Raven
This is by far the best app I’ve tried. It supports Split View which was how i originally found it. Not to mention there are no ads and it merges sudoku and killer sudoku into one app.

Developer Response
Thank you for your kind words. I’m glad you like the app. Have fun!
Best Sudoku app for iPad
10/10/2023

P-Raven

This is by far the best app I’ve tried. It supports Split View which was how i originally found it. Not to mention there are no ads and it merges sudoku and killer sudoku into one app.
Developer Response 10/12/2023
Thank you for your kind words. I’m glad you like the app. Have fun!
really good potential
04/16/2025

Jan 6 2015
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

Developer Response
Hi, thanks for your kind feedback. The setting to disable highlighting is a good idea, I’ll consider it. For showing errors there is an option you can turn on. On the main screen you can tap on the info button in the lower left. There you can enable “Show all errors”. Kind regards Fabian
really good potential
04/16/2025

Jan 6 2015

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
Developer Response 04/25/2025
Hi, thanks for your kind feedback. The setting to disable highlighting is a good idea, I’ll consider it. For showing errors there is an option you can turn on. On the main screen you can tap on the info button in the lower left. There you can enable “Show all errors”. Kind regards Fabian

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.

Version 1.4.2

Mar 7

In-App Purchases

SudoKoi++

Unlock access to thousands of Sudokus.

$24.99

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Accessibility

Information

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Compatibility
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Age Rating
In-App Purchases
Copyright

Developer Website

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Supports

Family Sharing

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Sudoku & Killer: SudoKoi

No Ads. Logic Puzzles. Minimal

Ratings & Reviews

What’s New

Version 1.4.2

In-App Purchases

App Privacy

Data Not Linked to You

Accessibility

Information

Supports

Family Sharing

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