No, Sudoku - Classic Sudoku Puzzle is not entirely free. While the app itself is free to download, it includes in-app purchases and advertisements. These optional purchases generally consist of tools to assist you with challenging puzzles, such as hints or the ability to remove ads. Additionally, advertisements may appear occasionally between games to support the free version of the app.

Despite these optional purchases, players can enjoy the full Sudoku experience without spending money. However, accessing some advanced features or removing ads altogether will require purchases. It's structured so that players can freely choose whether to make purchases based on their gameplay preferences.

iOS Installation Guide:Sudoku - Classic Sudoku Puzzle is available for devices running iOS 11.0 or later. To install, open the App Store and use the search function to find "Sudoku - Classic Sudoku Puzzle" by Guru Puzzle Game. Once found, tap the "Get" button to start the download. The app may request permissions such as notifications, which help keep you informed of updates or challenges. Ensure you agree to these during installation for the best experience.

Android Installation Guide:For Android devices, ensure your operating system is Android 5.0 or later. Open the Google Play Store, search for "Sudoku - Classic Sudoku Puzzle" developed by Guru Puzzle Game, and tap "Install." The app may request permissions like network access to provide a full feature set or deliver ads. Accept any requests to optimize your gameplay experience. Watch for additional settings, such as allowing notifications or data permissions, during installation.

Step 1: Open the Sudoku app, and you will be greeted by the main menu. Here, you can choose among different difficulty levels like Easy, Medium, Hard, and Expert. Select a level that matches your experience or mood.Step 2: The game board consists of a 9x9 grid filled with some pre-placed numbers and empty cells. Your goal is to fill each row, column, and 3x3 subgrid with the numbers 1 to 9, without repetition.Step 3: To input a number, tap on the empty cell you wish to fill, then select the desired number from the keypad below. If you’re unsure, the app provides hints visible at the bottom, and you can use them judiciously.Step 4: As you continue, utilize the notes feature to jot down potential numbers for difficult cells. This feature helps during more complex puzzles and is accessible via the "Note" button on the interface.Step 5: Once your grid is complete, the app automatically checks it for correctness. If incorrect, you'll receive alerts on mistakes, allowing for quick corrections. If correct, celebrate as your score is logged onto the leaderboard!

Tip 1:Start with filling in the numbers that are most frequently present on the board, as they help narrow down possibilities for empty spaces.Tip 2:Use the "Notes" feature diligently, especially in challenging puzzles. Keeping track of possible numbers within a cell prevents mistakes and aids in visualizing possible solutions.Tip 3:Avoid using hints too quickly. They’re a great tool, but relying on them can reduce the challenge and satisfaction. Try solving significant portions individually before resorting to hints.