So what is (are) KwickieApps?
KwickieApps is a collection of web apps built by MsMathMaster that are designed for an android cell phone or small tablet. They are CS coding exercises that provide the user with a game or puzzle or math topic that takes only a minute or so to view.
Originally the webs apps were translated into native android by AdobePhoneGap and placed on the Google Play Store. But Adobe no longer provides this service and the Play Store changed some rules that MsMathMaster could not meet.
So MMM decided to provide the original android apps privately (APK files) and continue building web apps that execute on any device.