Android application package file (APK) is the file format to distribute and install application software onto Google's Android operating system.
Before attempting a manual installation of apps using the .apk files, you must first allow your smartphone to install from Unknown Sources
To do this, navigate to Menu -> Settings -> Applications and check the box marked Unknown Sources.
From Designer, choose Download to this Computer from the Package ... drop down menu and the download will start automatically. It may take some time.
Once you download the apk file to your computer, you can share it