Choosing a Sudoku app for iPhone

The best fit depends on what you want to do: keep a daily habit, learn a technique, or bring a paper puzzle onto your phone. Here are two options with different strengths, followed by a checklist for trying them.

We make Sudoku a Day. This is a feature-based guide using the linked App Store descriptions, not an independent scored review. Listings checked on September 9, 2026.

For a daily habit: Sudoku a Day

Our iPhone app is free to download and ad-free. Its listing describes daily puzzles, difficulty choices, dark mode, reminders, streaks and offline play. Optional Pro adds past puzzles and extra guidance. Check the current listing for compatibility and purchase details.

For learning techniques: Good Sudoku

Good Sudoku by Zach Gage lists explanatory hints, individual technique practice and a custom mode for importing puzzles. It supports iPhone and iPad and lists in-app purchases. Try its help settings to see whether its teaching style suits you.

What to try on your own iPhone

• Controls: enter digits, erase one, undo and add notes. Check that you can do these comfortably on your screen.
• Help: try a hint and see whether it explains a deduction or simply gives a number.
• Access: check which puzzles and tools are free, what a purchase unlocks and whether a subscription renews.
• Offline needs: open a puzzle without a connection before depending on it during travel.

Compare more options

The broader app comparison includes other developers and platforms. If advertising is your main concern, read the ad-free guide. You can also play in your browser or choose printable puzzles with answers.