In general, you should install apps outside of your phone's app store only if you have a very good reason to.

Need helping installing an APK file on your Android phone? We'll show you how to properly install third-party apps and stores without Google Play.

Want to try downloading and installing apps on your Kindle Fire aside from the ones that Amazon offers? Follow these steps to add Google's Android Market.

If you’ve got a shiny new phone or tablet running Android 14, it’s true that you can’t download and install these older apps on your device itself.