Currently, you can install apps from the Amazon Appstore or directly install the APK file onto the WAVE.
To install an APK file, please follow the below steps.
1. Download the APK file onto a USB thumb drive.
2. Insert the USB thumb drive to the back of the WAVE.
3. Launch the app, Update&Backup, on WAVE.
4. Tap on Select and select the APK file.
5. Tap on Update
Your APK file will start installing and the app will be installed onto your WAVE.