This has very quickly turned into my go-to game app. Overall, the developers have done a beautiful job. This app is intuitive, the sudoku puzzles are enjoyable and it's fun to look at the stats and see gradual improvements over time. My only qualm is that I wish that correct answers would lock into place. There have been a fair number of times where I accidentally clicked a correctly filled cell and selected a number intended for the cell above or below causing a mistake to be registered. Using a smaller screened device, this happens enough to cause notable inconvenience. That said, this still knocks every other sudoku app out of the water for me. It has very quickly turned into one of my most used apps. Huge thank you to the developers!

I like this app for what it is- sudoku with no adds, but there are 2 issues I’ve had with it. 1) the sound effects settings always seem to turn back on after I shut them off, and it will turn off the audio of whatever I’m listening to. Obnoxious. 2) the app doesn’t seem to work offline which is kind of a pain. It’s like, exactly the kind of game you’d want to have on airplane mode but that doesn’t seem to be an option. Kind of feels like there should be a certain number of puzzles available offline for this situation

Impressed that this developer focuses on pure Sudoku, without ads. His privacy policy is also superb — no data collected. That should be federal law. However, before I could even get started, I encountered two major obstacles! They may not matter to you, so give the app a chance. What were the issues? 1️⃣ An on-screen timer with, apparently, no option to turn it off. That’d a distraction, pure and simple. I play for the intellectual challenge, not as a race. Others must, too. 2️⃣ Several squares that were colored, with no borders. Why? Again, apparently, no option to turn off the coloring and simply see a board. That was also distracting. No doubt, there's a reason for this, but give users the option to skip it! OK, so I figured out it's a focus device. But most of us don't need that! We know how Sudoku works. RECOMMENDATION 3️⃣ A suggestion. My favorite Sudoku game — :) Sudoku (Enjoy Sudoku) is no longer available — but got the design 💯% correct. Two numeric keypads, one to enter the number and the other to pencil in a possibility, was a brilliant design. 4️⃣ In any event, please do not let my review, and my idiosyncrasies, deter you from trying this app. Any developer willing to give to the community, eschew ads, and NOT collect data needs to be given a chance. 5️⃣ Tried it again, but couldn’t figure out how to pencil in possibilities. Then, all of a sudden, the app booted me out of the game, saying I had run out of chances. Whoa, was that off-putting! 6️⃣ Finally, apologies as this review ended up with sentences run together. The App Store review system is broken and dysfunctional. On my iPad and iPhones, I always put in paragraph breaks in my reviews, and they show up on my device, but the App Store consistently removes them and mashes everything together into one MASSIVE paragraph. That’s ridiculous! It's hard to write a coherent, legible review and hard on the readers to process reviews that a mass (mess) of text — and glean the points. This has been going on for years, Fix it, Apple!

It’s good, however it only allows you to play 4 numbers at a time… which is a pain cause you can not fill in numbers higher than the four numbers offered at the bottom of the puzzle.