Repository
https://github.com/SecUSo/privacy-friendly-sudoku
Introduction
Hello there and welcome to today's review. In the last review, I discussed an app called Network Monitor. In today's review, I'll be talking about a game.
I can still remember the days I enjoyed playing games using Nokia 103. I really enjoyed the games except for the Sudoku game. The game was difficult for me in a way that I thought it was impossible to win the game. Hatred came inπ , and the name of the game was forever in my head.
Today, I'll be reviewing a Sudoku game. If someone told me that I'll ever have this much interest and understanding in a Sudoku game, I won't believe it.
If you have been reading my review, you'll discover that my last two reviews were about projects owned by SECUSO. The Password Generator app was the first project of theirs which I reviewed. Due to what I saw in the app, I went ahead to review another project of theirs called Network Monitor.
Guess what? The Sudoku game is actually from the same team of inspiring developers.
What is Sudoku

I would simply define Sudoku as a puzzle game that has to do with arranging numbers on a board.
However, let's see how better Wikipedia defines it;
Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9Γ9 grid with digits so that each column, each row, and each of the nine 3Γ3 sub-grids that compose the grid contain all of the digits from 1 to 9.
Looking at the repo, the SECUSO group gives the app a very simple and short definition which says that Privacy Friendly Sudoku is a logic-based game.
The latest version of the app is version 2.1.1, and it weighs only 2.15 MB. You can download the Sudoku game both on Google Play and on F-Droid. You can also download it directly.
Features
- This Sudoku game app does not track its user's and doesn't display ads to users. The app doesn't require any permissions, as it can function perfectly without any permissions.
- Users can select the type of board they want. I have never seen any Sudoku game that allows its user's to select the type of board they want to play on. After launching the game and going through the normal intro feature, I discovered that I could select a 6 by 6, 9 by 9, or a 12 by 12 board. I also saw some stars below which is meant for setting the game difficulty. For a start, I selected the 6 by 6 type of board and set the difficulty level to easy.

- The game: A lot of features are embedded in the main game. Firstly, there are numbers on the game screen. These numbers are directly under the board and are used to input digits into the board. Looking below the numbers, there are 5 buttons. The first button redoes the last undone action. The second button undoes the last action. The third button is a hint button; it unveils any selected block. The fourth button is to delete any digit on the board. While the fifth button is a note toggle button; toggles if digits should be set as notes or as values in a block.

I'm good at using the hint button, but I'm better at using the two first buttons; redoing and undoing. π
At the top right corner of the game is a timer which counts the amount of time taken to complete the game. I like the timer feature but dislike the fact that it can't be turned off. There's also a reset button which a player can use to resets the whole board.
Why do I choose Privacy Friendly Sudoku over other Sudoku games?
- The Privacy Friendly sudoku is the simplest Sudoku game I've seen. That is the main reason why I now enjoy playing Sudoku game. I've seen many Sudoku games but neither of them was/is like the Privacy Friendly Sudoku.
One of the Sudoku games I found is a Sudoku made by fassor.
- Firstly, the Fassor Sudoku is strictly a 9*9 board game. Meanwhile, on Privacy Friendly Sudoku, I can select a 6 by 6, 9 by 9, or a 12 by 12 board.
- Secondly, some of the features of the Fassor Sudoku requires the user to login to Google. On the other hand, the Privacy Friendly Sudoku does not require the user to login to Google.

- Thirdly, on the Fassor Sudoku, users have to buy the premium version of the game, in order to disable ads. However, on the Privacy Friendly Sudoku, ads don't exist, and nothing is being paid for.

- Finally, on the Privacy Friendly Sudoku, there are a lot of buttons (redo, undo, and hint buttons) which helps the user while he/she is playing. On the other hand, the Fassor Sudoku doesn't have any of the specified buttons.
How to play the Privacy Friendly Sudoku?
It isn't any bit confusing. It's easier than I thought and I know it'll be easy for you too.
However, if you experience any difficulty while playing, all you have to do is to click on the help option. The help option has enough explanation to aid all user's play the Sudoku game.

Conclusion
The SECUSO group is really doing it. They make every of their project as simple as possible.
They just made Sudoku easier for me! π