Grabbing APK files from the Play Store may sound absurd, considering that you can just fire up the Play Store app and search your desired Android app and install. That's the de facto legal method of obtaining apps of your choice from the Play Store.
However, there are situations when you needed to bypass the app marketplace for some reasons. For instance:
(a) you may be fiddling around an Android simulator on your Windows or Mac and the only way to install an app is by loading its APK files.
(b) Or you desperately need to install an Android app not available in your country so you resort to bypass the Google Play Store country restriction and just grab its APK files.
(c) Or you've stumbled upon a controversial Android app and you know it's going to be removed soon so you create an APK file as a backup.
Whatever the motivation is, you can always grab a standalone Android Package Kit (APK) from an Android app published on Play Store.
Generate APK File from Google Play Store
The trick is easy.
Head to APK Download website (https://apps.evozi.com/apk-downloader/)
Copy and paste the package name or Google Play URL (e.g. wifi.killl.com)
Click Generate Download Link button.
You're done.
Obtaining APK file may take a minute or so depending on an Android app's package size.
