Sudoku Free

Update: AI Factory was very responsive in email and is trying to fix the issue. Currently the frequency of the crashes has greatly reduced. After years of enjoyment Sudoku and my other AI Factory apps are constantly crashing. Reinstall didn't fix it. Seems ad related. Suddenly the ad in the upper left corner starts flickering between the ad and the app logo and it crashes.

Game is good. It would be less confusing if when you correctly place a number, that the "notes" numbers would automatically be removed instead of having to manually remove them. that's where most of my errors occur.

Ads when I open the game and after every game. Plus the ads are getting longer and longer, not to mention it is nearly impossible to close app without opening an ad window. I use to enjoy playing A1 Factory and now ready to dump the game.

I really enjoy this sudoku app but the adds have gotten more annoying over the years. An option to remove them would be nice even if it requires payment like other apps do.

Was a great app but now has too many adverts. Don't mind the occasional advert but every time you complete is a little much

Notes for missing numbers don't automatically disappear when that is found somewhere else in a small square

very good, enjoyable. but why does no one understand that noting what an unkempt square ISN'T works so much better than noting what it might be?!?

I like that all like numbers light up when you place a number. I also appreciate being able to change the appearance of the board. Two big cons kind of ruin the game for me, though. For one, instructions for play are terrible. I had a hard time just figuring out how to play. Also, it would help a lot if--when you place a number--all like numbers in notes in adjoining rows & columns would disappear. You waste too much time removing them manually.

This game is not too complicated to play but does take a great deal of concentration and attention to detail. The option to make notes in the squares helps to make a very challenging game doable! I'm midway through level four and haven't encountered any mistakes in the game that would make the level unsolvable but I have made mistakes I've had to backtrack to fix.

I simply love this app. That is, I used to. Great interface and a lot of puzzles. But now on my new Nokia 6.2 (Android One) once completed puzzles seem to reset randomly. I started level 1, puzzle 1 and so on. No some earlier finished puzzles are reset. So I do them again (I want to complete them all) and then other puzzles "vanish". What can that be? The app has permission to the storage. Update (march 8) It seems that the main memory of my phone is damaged. Thanks for the support (by mail).

This is a very nice app; I am enjoying it. However, Quicknotes could use some work. It is not possible to have just one number in the quicknotes format on screen, so when I delete the second number, the remaining provisional number looks like I have decided that's the correct number for that square. I have had to restart the puzzle a few times because of the mistakes this causes. apart from that, very slick, thank you.

Editing my review: When trying to use the app, everything freezes, I get a black screen and can't do anything but going back to my homescreen and killing the app. ****** For the past few weeks app crashes before even opening. I've been using it for a few years now, but am not able to use it any longer. I understand I'm not the only one experiencing problems with the app lately. And no. Please don't send me to look for system updates or anything like that. Everything on my device is up to date.

Really enjoy the game. Entire effort is well executed. There is a bug in timing the games however. If you pause a game, and resume it the next day but at an earlier hour, the elapsed game time is absolutely wrong. It only affects statistics, not the play, so no big deal. Just a minor annoyance.

I have played this game for years, always loved it. I was pretty far along when the app started freezing. Tried everything till i finally reinstalled it. That didnt fix the problem and deleted my progress. I guess im done. I appreciate the game, but this is the second time it started freezing. Tired of starting over.

I love this game! The only negative thing I can say is that it has been freezing up the last few weeks and will shut down.

Best Sudoko app I've found. One of the first apps I install on every new phone. Yes, there are ads, but ONE ad per game really isn't going to ruin my day, especially when you can back out or X out of the ad after a few seconds. Thanks for being reliable all of these years - you guys have done a great job!

Well, its sudoku... well executed. The highest difficulty is still doable without having to evaluate on more than one level. There always is at least one place where you can start to unravel the puzzle. No idea if it would be fun solving a sudoku where there is no way to deduce the first number, but I'd like to try.

Whilst it is a well laid out game, easy to use, I now find the adverts too intrusive. They used to be acceptable (you expect adverts from a free app), but now they are far too intrusive as you have to wait for the advert to play for some time before you can move on to another level. Very disappointed. I used this app for many years, but I am now uninstalling it.

Is ok ui is fine and ads arent too annoying would buy if they had google play integration, after switching devices i had to start all over again :( Edit: This is not a useful 'solution, with my old phone rendered as useful as a paperweight and their response is alienating to anyone not tech savvy . As a software developer myself i know that there are API's for uploading and downloading files from the users drive, so whats the hold up?

Use to work great. Now after the latest patch, crashes every time I try to play. Shame.

great game features. From the hint feature I've learned how 2 play better. & the ads R appropriately done, not in your face as most "free" stuff does. Rather than straight out avoid & ignore I've actually looked at the ads & downloaded a few. Kudos 2 both the program & the way it's packaged.

Pretty good game. It's hard enough, but not too hard. I'm not a Sudoku expert, but I've managed to play through the Level 5 games and I'm going through them again. It's a good mental exercise once a day. It has quit on me twice, but I reinstalled it and started over.

While other decry the method this game uses in unmarking moves I enjoy the need to manually deleting unneeded numbers in the squares or rows. More akin to the original Sudoku books. It also makes you use your brain that way. As for the free version sure the commercials are intrusive but hey it's free and at least you can fast-forward through most. EDIT- To those of you complaining about crashing, turn on the "always on" setting. You'll get a popup about battery life, click ok and enjoy the game.

Love playing this game. It has different difficulty levels, easy to see board and options to use small numbers while trying to figure out what number goes in the box. I love all the games from this company, AI Factory Limited, and have them downloaded. The boards are great, cards easy to see and non distracting.

The game itself is OK, but as others have said, the ads are a problem. They try to trick you into clicking and many do not respect the fact you have sound turned off for the game. I understand the need for ads in a free version, but I will NEVER buy anything from an ad in this game just on principle, simply because they are mostly all rouges.

The game itself is perfect. Layout and graphics are better than any other sudoku app. The inescapable video ads, though, are driving me crazy. And you can't upgrade, so you're stuck with the ads.