What Is an APK?
An APK (Android Package Kit) is a type of file that installs an application for Android. If you are technically savvy, it’s like a file you run to install programs on Windows or Mac.
In this case, the APK file is simply the installer file you click to install applications on your Android device.
Since your phone considers any application outside of Google Play an “unknown app”, you need to tell your phone to allow you to install unknown apps.
ENABLE INSTALLING “UNKOWN APPS” ON ANDROID NOUGAT
- Go into Settings
- Tap Security (or Lock Screen and Security).
- Scroll down to the Device Administration section, and enable Unknown Sources.
ENABLE INSTALLING “UNKOWN APPS” ON ANDROID OREO
- Go to Settings
- Then Apps and Notifications
- Select Install Unknown Apps (or Install Other Apps).
Install an Android File Manager
Now that you’ve configured your phone to let you install unknown apps, you’ll also need a way to find that application file (APK file) on your phone so you can run it.
Android phones typically come with a “File Manager” app you can use. But if you don’t have one, then open Google Play on your phone and search for “File Manager.
Don’t forget to add this app to “autorun” to avoid accidentally closing the application.