Frequently asked questions

Yes, you can download and play SudoLuma for free.

Choose Left hand or Right hand in Settings and the number keys and actions gather on the side your thumb reaches. "Easier reach" lets you play without stretching to the top rows.

No: SudoLuma works fully offline and you do not need an account.

Your game progress, statistics and settings are stored in a local database on your device; the app has no server of its own. If you delete the app, the on-device data is deleted too.

The Hint button does not just show the answer; it explains step by step which technique applies on the board and why. You can open the matching lesson in the Learn tab to practice with an example. The Stuck button also checks whether your notes are correct.

Each puzzle is rated by the hardest technique needed to solve it, shown as an SE (Sudoku Explainer) score. Easy needs only single techniques; Master requires chains and advanced techniques.

Solving the day's puzzle adds one to your streak. You have one "break" per month: if you missed yesterday, you can keep your streak with it. Past days can be played from the calendar and do not affect the streak.

Yes: high-contrast and color-blind-friendly themes, large text support, VoiceOver and TalkBack labels, and buttons with touch targets of at least 48 dp.

Turkish, English, Russian, French, Spanish, German, Italian, Portuguese, Polish, Dutch, Finnish, Hungarian, Romanian, Vietnamese, Bulgarian, Greek, Japanese, Korean, Arabic and Persian. The language follows your phone (English if yours is not supported) and can be changed in Settings.

iPhone and iPad, and Android phones and tablets. Tablets use a wide-screen layout.

Thank you! Write to us following the guidance on the Support page: support@serbila.com