This is a very intriguing issue. There is definitely a Fitbit app in the Amazon Kindle App Store. I searched through some rather old posts and found posts where users said they were syncing devices with a Kindle Fire. Kindles are definitely not supported devices. I read somewhere that the Kindle OS is an "un-googled" version of Android.

Factory Reset AMAZON Fire Kids Edition, how to - HardReset Factory Reset AMAZON Fire Kids Edition. The Hard Reset is also commonly known as factory reset.This tutorial will show you the easiest way to perform a factory reset operation in AMAZON Fire Kids Edition. Find out the way to remove all personal data, customized settings and installed apps from AMAZON Fire Kids Edition.. As a result your Android 5.0 Lollipop will run faster, you will be able to Setting Up Kindle Fire Hd 8 For Kid | Kids Oct 05, 2019

Apr 12, 2014

The Kindle Fire can be a useful device for kids, since it’s tied directly to your Amazon account, giving you more control over content. But to get the most out of it, and to keep kids away from shows and books they probably shouldn’t experience yet, you should both use the parental controls the device offers and implement your own. How to Setup a Kindle for a Guest or Child | The eBook

Dec 26, 2011

Setting up Kindle Fire for senior citizen - Best apps : kindle Mar 05, 2009 Amazon.co.uk Help: Set Up and Use Fire for Kids From the child's profile, tap a content library, for example, Books, and then tap a content title to open it. If the To access settings or exit Fire for Kids, swipe down from the top of the screen to open Quick Settings, and then tap