Sudoku Calm

Are there really no ads?
Correct. Sudoku Calm has no advertising of any kind.

Do I need an account or internet?
No. The app works fully offline and never asks you to sign in.

What is included for free?
Classic Easy, Medium and Hard puzzles plus the daily challenge. Killer Sudoku, Expert and Evil levels, every theme and unlimited hints are part of Premium.

How do I unlock Premium?
Open the app, tap Unlock Everything, and choose the one-time Lifetime purchase or a weekly or annual subscription.

How do I restore my purchase?
Open Settings inside the app and tap Restore Purchases.

How do I make the numbers bigger?
In Settings, turn on Large Print or choose the Comfort theme.