Profile: Steve Schlotter

Getting started says "The App is supported on Amazon Fire tablets running Fire OS 7.1 API Level 26 or higher."  Mine is running 7.3.3.1.  Shouldn't that work?

I understand that I need to side load the app on a Amazon Fire tablet because it is not available in the Appstore.
I downloaded com.bluefire_llc.apps.v11.2.2.apk but I get an "app not installed" message at the end of the installation process.  Can you help?