The Amazon Appstore is the place Kindle Fire users go to get their apps, but it has some disadvantages compared to Google Play, especially in the number of apps. If you want to install an app on your Kindle Fire that’s outside the Amazon Appstore, you’ll have to sideload it — here’s how. First, you have to enable the ability to install apps from unknown sources (those outside of the Appstore). This process differs a bit depending on how new your Kindle is: For first or second-generation devices, head to Settings > More > Device > Allow Installation of Applications…
Read the full article: How to Install Any Android App on Your Kindle Fire
