What is an APK File?
An Android Package Kit (APK for short) is the package file format used by the Android operating system for distribution and installation of mobile apps. Just like Windows (PC) systems use an .exe file for installing software, the APK does the same for Android.
How to install an APK from your Android device?
You can also install APK files from your browser on your Android smartphone or tablet.
Just open the APK file link attached to on your Android mobile device to download, you should then be able to see it downloading on the top bar of your device.
Once it's downloaded, open Downloads, tap on the APK file, and tap Yes when prompted.
The app will begin installing on your device.
Attached below is the smartpoint APK file for the Bauhn Wi-Fi Power Point Controller