Killer Sudoku +

I use it every single day. It’s massively improved my maths skills, and it keeps my thinking fresh, whilst at the same time providing a perfect retreat. Thank you. One small thing.i have bought multiple packs from you - but having just had to reset to factory settings after getting my charger port replaced, they have all disappeared when i restored my ioad. Hiw do I retrieve my packs please?

I downloaded this app because it doesn’t track me or share my data. After playing the free puzzles for a while, I paid for a bundle of new puzzles because I really like the app. For me, this has everything I need from sudoku, with the right level of easy/hard and a range of options, all of which can be turned off or ignored so I can play how I want to. As someone with dyscalculia this is really appreciated. You can start each puzzle with no help at all, no “starter” cells filled in, or I can fill in some cells one by one until I am able to get started. This works even with easy puzzles. It’s a level of control over each puzzle I haven’t seen in other apps. The only thing missing for me that I’ve seen in other sudoku apps is the option to highlight all cells filled in with a particular number. As someone who struggles with numbers, especially with seeing all the same numbers, I’ve found that a really useful feature. But I get that most people aren’t like me! Thank you to the developer for respecting my data privacy.

I enjoy the problems, however, I do find that problems, which are supposed to be of similar difficulty, can take from as little as 30 minutes to over 1.5 hours, a small number never being finished but abandoned. I can spend/waste a lot of time every day on them!

I’ve bought all the 100 packs of hard and extreme puzzles in this app and can’t find another app to match this one for a challenge. This app demands skill with the numbers and sometimes it takes me 15 mins and sometimes an hour. I think I will have to buy the 500 pack although presumably there’s overlap with the 100s that I’ve already done. This app is also better in use than other apps: you can type number options in cells and select multiple cells. It also gives number options although I try not to use this.

I’ve had this for a while now, I love it. It keeps me amused and still when I wake in the early hours until I’m ready to drop off to sleep again

Fantastic app spoiled by no facility to transfer completed puzzles during the process of restoring purchases when changing to a new device. So I had completed around half if the extreme pack 1 of puzzles which all disappeared when I installed the app on my new iPhone and restored purchases.

I’ve used this game for around 10 years. It’s always with me to while away time at airports, doctors, etc.. Extremely well designed and managed! Highly recommended!

10 free games to get you started, then extras are only a penny each. No ads. Really useful functions for bifurcation, combinations and summing. The best that I’ve tried.

The game makes you sharp thinking on a functional daily Math !!

The App is very well design and user friendly. It has all the tools for marking up each square - many nice touches. I am a relatively competent solver and the moderate puzzles takes around 40-50 minutes.