Sudoku - Classic Sudoku Puzzle by Guru Puzzle Game is free to download, making it accessible for anyone eager to dive into the logic-based puzzle game. You can enjoy all the traditional fun of Sudoku without paying a cent to get started. The game comes with multiple difficulty levels, allowing players to gradually sharpen their puzzle-solving skills without any cost.

That said, the app does contain in-app purchases and advertisements. Purchases might include hints, ad removals, or special packs of puzzles for those who want an enhanced experience. Advertisements typically appear between puzzles or during gameplay pauses, but they don't interrupt the active play. Optional purchases and ads afford players the opportunity to tailor their gameplay experience, either by supporting development or by making the gameplay smoother and more personalized.

Installation on iOS Devices: To install Sudoku - Classic Sudoku Puzzle on your iPhone or iPad, ensure your device runs iOS 10.0 or later. Head to the App Store, tap the search icon, and type "Sudoku - Classic Sudoku Puzzle." Look for the app by Guru Puzzle Game and tap "Get" to download it. The app might request permissions for notifications, which will let you stay updated with new features or challenges. During installation, ensure your device has a stable internet connection and confirm any prompts requiring you to agree to permissions or settings.

Installation on Android Devices: For Android users, make sure your device is running Android OS 5.0 or later. Go to the Google Play Store and use the search bar to type in "Sudoku - Classic Sudoku Puzzle" by Guru Puzzle Game. Select the correct app from the results and tap "Install." During installation, be ready to accept permissions such as storage or network access, allowing the game to function smoothly. Be sure you have enough storage space and that your device is connected to a reliable Wi-Fi network for a seamless download experience.

Step 1: After downloading and launching the app, you'll be greeted by an introductory screen or a brief tutorial to explain the basic rules of Sudoku. Listen and read carefully to understand the game's objective and how it's played.

Step 2: Once you've learned the basics, you'll be prompted to select a difficulty level—usually ranging from easy to hard. If you're new to Sudoku, start with the easy level to acclimate yourself to the puzzle mechanics.

Step 3: In the game interface, you'll see a 9x9 grid divided into smaller 3x3 squares. Your task is to fill in the blank squares so that each row, column, and 3x3 box contains numbers 1 to 9, without repeating any numbers.

Step 4: Navigate through the grid using taps or swipes. Selecting a blank square will activate input options usually appearing at the bottom or side of the screen, allowing you to choose numbers. Use logical reasoning to decide which numbers fit each square.

Step 5: Utilize hints if you get stuck, though they may be limited or require an in-app purchase. Once you solve the puzzle, the game often celebrates your achievement with a brief animation or congratulatory message, motivating you to try the next puzzle.

Tip 1: Start by focusing on filling in the rows or columns with the most numbers already placed. This starting strategy helps narrow down possibilities more quickly and gives a helpful foothold in solving the puzzle.

Tip 2: Use the 'note' feature provided in the app to keep track of potential numbers for tricky squares. Marking possibilities can help you see the interactions within the grid at a glance, particularly across different zones.

Tip 3: Take note of any errors by examining rows, columns, and boxes after placing numbers. Acknowledging and correcting mistakes early on can prevent tougher issues later in the puzzle. Regular reviewing increases your solving efficiency and accuracy.