What Do the Numbers Mean?
Open Sudoku is the 13th game in my in my Keep It or Delete It Review series. Open Sudoku is an open-source app version of the popular number solving game.
I have had this app for a few years. I solved a few puzzles before the review to remind myself of what the app is like. I played this game on my LG V20 Android smartphone.
About Open-Source Software and F-Droid
What Is Open-Source Software?
Before I start the review, I would like to explain a little about open-source software as this something I care a lot about.
Open Sudoku is an open-source game. This means anybody can look at the game’s source code and make their version or “fork” as software developers say. Open-source software tends to be completely free.
Free as in it costs you zero money and free as in anybody can make their own version and distribute it.
Normally open source apps are going to be free of annoyances and in-app purchases. I 100% support open-source software, and I use it whenever I can. My desktop computer is currently running Ubuntu.
What Is F-Droid?
If you want to learn more about open-source apps, look at F-Droid. F-Droid is easy to use, and almost all of the apps are open source.
I downloaded Open Sudoku from F-droid, and I use some other apps from there as well. F-Droid is 100% secure, and you can trust apps you download from it.
What Is Sudoku?
Sudoku is a game about filling in a grid of nine squares with numbers. Each row, column, and box needs to have the numbers one – nine filled in. But only once as a true Sudoku puzzle only has one solution.
The difficulty in Sudoku is trying to figure out where these numbers go with the limited information you receive at the start of the game. Some cells (spots in boxes for the numbers) being filled in for you.
How Is Open Sudoku as a Sudoku Game?
Open Sudoku is a great version of the game. It has puzzles that have one solution and should not require guessing. They can be solved with logic. There are hundreds of puzzles for you to play, and you can download more if necessary.
There are also plenty of options you can configure. There are several input options you can use.
You can set the game to auto fill and remove notes for you. You can also set the game to show when you made an error. This is very useful when you are still learning to play.
The game also has a checkpoint system. This is very useful on the harder puzzles when you want to test something and see the results.
Sudoku is a game about staring at boxes of numbers. I suppose the game could have used a more flashy theme or style, but I like the simplistic look the game has. It lets me focus on solving the puzzles.
I like the dark theme as well, and I try to have as many apps as possible with dark themes.
The game does not have any sounds other than tapping. I am not annoyed at this, though, as Sudoku doesn’t need noises.
Other Review Information
There is nothing to buy in this game, and there are also no annoyances.
Overall Thoughts on Open Sudoku
Open Sudoku is great, and I love that it lets you play the game without any interruptions. I love the simple design.
Do I Recommend Open Sudoku?
If you don’t mind needing to download extra puzzles, then yes. This is the Sudoku game I would recommend people.
Will I Keep on Playing Open Sudoku?
Of course. I love Sudoku, and this is the best version of Sudoku I have found.