# Shirodoko - A contender for the next Sudoku! > Logic puzzle game with unlimited puzzles, optional ad removal and board size expansion. (iPhone/iPad app by Pondnetic LLC.) - Source: https://appshunter.io/ios/app/shirodoko-a-contender-for-the-next-sudoku/id953894606 (this page in markdown: same URL + `.md`) - Developer: [Pondnetic LLC](https://appshunter.io/developer/953894605) - Category: Games - Price: Free with in-app purchases - Rating: 4.62/5 from 13 App Store ratings · 11 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 51 MB - Languages: Afrikaans, Arabic, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew and 17 more - Released: 2015-01-20 - Data updated: 2026-06-05 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/shirodoko-a-contender-for-the-next-sudoku/id953894606/reviews.md ## What is Shirodoko? A contender for the next Sudoku! Unlimited puzzles! Only one optional IAP. Shirodoko™ is a contender for the next Sudoku! This logic puzzle game is known by other names such as Kuromasu, Kurodoko, or "Where is Black Cells". Free to download with ads, and only one optional IAP to buy, ever! Even without the IAP you get near-infinite puzzles to play. The lone IAP removes ads and adds more variety to your puzzles by allowing for more board sizes. 9x9, 6x12 and 10x18 sizes are included. With purchase any size from 5x5 to 20x30 is possible. ## Key features - Unlimited puzzles - Logic puzzle gameplay - Optional one-time in-app purchase - Ad removal - Expanded board sizes - Multiple board dimensions ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Remove ads and enable custom game sizes | $1.99 | one-time | ## Recent user reviews (10 of 11) All indexed reviews: https://appshunter.io/ios/app/shirodoko-a-contender-for-the-next-sudoku/id953894606/reviews.md ### 4/5 — Great game, but ads are annoying *2016-10-10* Great game, but the ads come up randomly and are obnoxious when in the middle of a round. If they had an ad-free version for $2, then I would definitely pay it. Other than the times the ads pop up: a great puzzle game ### 5/5 — Shirodoko *2016-06-21* Great for us left-brainers! ### 5/5 — Get it *2015-09-18* Just a well-made, simple, and fun game ### 5/5 — Good game *2015-02-16* Has a lot of potential. Its fun ### 5/5 — Nice *2015-02-15* Nice ### 5/5 — Fun and challenging *2015-02-12* Puzzles take only a couple of minutes to solve once you get the hang of it. Fun game! ### 4/5 — very enjoyable *2015-02-01* I really enjoy the puzzles and this is well worth downloading. You can try it for free and unlocking the ads is quite inexpensive. I especially appreciate the fact that you get a seemingly infinite set of puzzles (I see the appeal of hand-crafted puzzles, but these auto-generated puzzles are quite enjoyable and you will never run out). None of this “you can’t play the next level until you unlock the last one” nonsense. The user interface is fairly clean and very simple, though it could use a bit of polish: - There is no feedback when a number’s constraints have been satisfied. I wish the appearance of the number changed. - You cannot drag to draw a line of dots - The puzzle is hidden when you solve it. I like to be able to admire my work. - The option to restore purchases is buried in Preferences, and is NOT available from the “remove ads” panel. I was pretty upset when I was asked to pay $1.99 again, before I discovered this. Also note that the difficulty level is rather variable. I find some hard puzzles fairly easy and others nearly impossible to do without guessing, but I generally enjoy the medium difficulty puzzles. ### 5/5 — Fun *2015-01-30* I enjoy sudoku and logic puzzles, so I like this. Can't stop sneaking in a game whenever i'm bored. ### 5/5 — Awesome Logic Game *2015-01-25* Very unique and fun logic game. Highly recommend checking it out if you like puzzles. ### 5/5 — great logic puzzler *2015-01-23* the multicolor means nothing. instead of filling in blocks to make a picture, you are trying to make sure all of the numbers have the correct amount of noncolored blocks left right up and down AND none of the colored tiles are left right up or down of another. try it, hate it, love it! ## Frequently asked questions about Shirodoko ### What is Shirodoko? Shirodoko is a logic puzzle game known by other names like Kuromasu or Kurodoko. It offers a near-infinite supply of puzzles for players to enjoy. ### Is Shirodoko free to play? Yes, Shirodoko is free to download and play. It contains advertisements, with an option for a one-time purchase to remove them. ### What does the optional in-app purchase in Shirodoko do? The single optional in-app purchase in Shirodoko removes advertisements and unlocks additional board sizes, ranging from 5x5 up to 20x30. ### What board sizes are available in Shirodoko? The base game includes 9x9, 6x12, and 10x18 board sizes. With the optional purchase, any size from 5x5 to 20x30 becomes available. ### Does Shirodoko have ads? Yes, the free version of Shirodoko contains advertisements. These can be removed with a one-time optional in-app purchase. ### What is the age rating for Shirodoko? Shirodoko has an age rating of 4+, making it suitable for a wide range of players. ### How often is Shirodoko updated? Shirodoko was last updated on February 5, 2015, to version 1.02. It was initially released on January 20, 2015. ### What is the user sentiment for Shirodoko? Shirodoko has a high user rating of 4.6 stars based on 13 ratings, indicating generally positive user sentiment. ## Version history (last 1 release) ### 1.02 — 2015-02-05 Minor bug fixes --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*