By default, you can only install apps purchased from the Amazon Appstore on your Kindle Fire. Unfortunately, installing Google Play requires you to root the tablet, which voids any existing warranty. To keep the warranty and install apps that are not listed in Amazon's store, you must install them using APK files. Installing apps using APK files only requires you to use a file manager application, so you don't need root access to the device. Note that installing apps from unreliable sources can sometimes be dangerous. Android apps can contain malicious code that can harm your device or your data.

Transferring the APK Files to the Kindle Fire

Step 1

Download the apps you want to load on your Kindle Fire on your hard disk in APK format. You can find Android application package files on the Internet and download most of them for free.

Step 2

Connect the Kindle Fire to your computer using its USB cable and wait until Windows installs the appropriate drivers.

Step 3

Press "Windows-X" in Windows to expand the Power User menu and then click "File Explorer" to launch the application.

Step 4

Open the folder that contains the APK files, select the files and then press "Ctrl-C" to copy them to the folder. To select several files, hold "Ctrl" and click each one. You can select everything in the folder by pressing "Ctrl-A."

Step 5

Select the Kindle drive, but don't open a folder. Press "Ctrl-V" to paste the APK files from the clipboard into the root of the Fire. Disconnect the Kindle from your computer after the transfer is complete.

Installing the Apps on the Tablet

Step 1

Tap the gear icon if you have a first generation Kindle Fire tablet. Otherwise, swipe the notifications bar from the top of the screen towards the bottom of the screen.

Step 2

Tap "More" or "Settings" and then tap "Device" to view all settings related to your device.

Step 3

Tap "On" next to the Allow Installation of Applications option to enable your Kindle Fire to install apps from unknown sources. Tap "OK" to confirm.

Step 4

Launch the file manager and use it to locate the APK files in the root of your tablet. Tap the APK you want to install and then tap "Install" to install it on your device. To launch the app after it is installed, tap "Open."