Killer Sudoku

★★★★★ The best killer sudoku. No ads, no pop-ups. The one-off payment gives value for money.

★★★★★ Positives: fun game, addictive, challenging. I had grown bored with regular sudoku. I could play this game for hours if I only had time. Negatives: it's too easy to accidentally enter a number in a cell when you meant only to place a note (putting you at risk of creating a mistake). There should be two very different color schemes for the entire screen to differentiate been "states" (number entry versus note entry). Also, the statistics function for the daily challenge do not work. I just completed a daily challenge with zero errors, but the stats for daily challenges show win rate 0%, the best time 00:00, average time 00:00, wins with no mistakes 0. The stats for fast, easy, medium and hard appear to work.

★★★★★ I love this game so much that I bought the add free version. It is the only game that I have kept playing consistently for over a year now.

★★★★★ Easy to use and a fair price for an app without ads. Ad free apps for small prices do still exist.

★★☆☆☆ Confusing controls, no corner notes, no calculator. A paid game should have this functionality.

★★☆☆☆ App suddenly in another language and format after 27 update. The help page says you can change languages using settings in the app, but there's no language option. Unable to use