There are in-app purchases and adverts in this application. The statistics show that the app is popular mostly among Samsung and Lenovo users. Take the opportunity to get the .apk installation package of Roll the Ball® 1.7.1 free of charge and read users' reviews on Droid Informer. The installer takes up 29 MB on disk and it can be launched on Android devices 4.1 and higher.
The antivirus report shows that the app is totally safe.
From the users' point of view, this application possesses such a disadvantage as video ads.