Make Sudoku easier to read on iPhone

Start with your iPhone’s text settings, then check the puzzle itself. A Sudoku grid can respond differently from the menus around it.

Apple documents both standard text sizes and additional accessibility sizes. The instructions below were checked against Apple’s guidance on September 18, 2026.

Adjust the standard text size

Open Settings, choose Display & Brightness, then Text Size. Move the slider toward the larger sizes. Open your Sudoku app again and look at its menus, labels, and puzzle numbers.

Try the additional text sizes

For more options, open Settings, choose Accessibility, then Display & Text Size. Open Larger Text and enable Larger Accessibility Sizes. Adjust the slider to a size you find comfortable.

Apple notes that very large text can make some controls harder to use in an app. Check that labels remain visible and that you can still reach the controls you need. See Apple’s text-size instructions.

Set a preference for one app

Your iPhone also has Per-App Settings under Accessibility. Add an app there to explore supported visual adjustments without applying the same choices everywhere. See Apple’s guide to settings for specific apps.

Inspect four parts of the puzzle

• Read the given numbers in each corner of the grid.
• Enter a number and check whether it is visually distinct from a clue.
• Add candidate notes if the app supports them, and check their size separately.
• Read the labels and messages around the board.

An app may draw the game board using its own sizing rules. If changing iPhone text settings only affects the menus, look for the app’s own size or zoom controls. The readable app checklist can help you compare alternatives.

What this means for Sudoku Large

Sudoku Large is made for people who prefer larger text. Explore the app’s reading experience or learn about the TestFlight beta. For a particular assistive feature, check with the team before relying on it in the beta.