Kindle e-readers, however, feature “e-ink” displays, some of which also support touch. These displays only show black and white colors, making them ideal for reading. There’s no app store or anything like that. It’s a device made entirely for reading books.
Once you’re in a book, tap the center of the display to bring up the menu. Select the “Aa” icon to adjust the text.
If you also own a Kindle e-reader, your progress in books will be synced across devices. So you can read on your Fire tablet and then switch over to the Kindle without losing your place.
That’s really all there is to it. The LED display on a Fire tablet won’t be as easy on your eyes as an e-ink Kindle, but it does work as an e-reader too. The same Kindle app that you can use on the Fire tablet is also available on iPhone, iPad, and Android.