Over 5M users set up the game and its most recent update was launched on Aug 23, 2019. Keep in mind ads and in-app purchases while downloading this application. Samsung and Gionee users install the app quite often.
A free .apk file of Sudoku SG-2.1.18 can be downloaded from Droid Informer and you can check out users' reviews on this site. Prepare 10 MB of free space on your device for this app setup package and take into account that it runs on Android 4.4 and above.
From the users' point of view, the strong sides of the app are a good UI and a good price. Some users indicate that there are some disadvantages, they are sync issues and long ads.