We often talk about APK files when discussing Android phones. But what are APK files, how do they work, and why should you care about them? Let's explain.

I downloaded the APK file from the website, then I tried to open it. I was told that I was not permitted to install unknown apps from my download manager—in your case the warning may name Chrome ...

Sometimes, not every Android app will be available on the Google Play Store in your region, which means you'll need to install the APK file instead.