Using the software Vellum I can format your books for the following devices.

Amazon: Kindle Paperwhite, Fire Tablet, and Kindle App

Apple Books: iPhone & iPad

Nook: Simple Touch

Kobo: Clara

Google Play: Android Tablet

Print Sizes: 5.06 × 7.81, 5.5 × 8.25, 6.14 ×9.21

Click here for file examples! (please note that if you click on this link then it will take you to an external Google Driver folder).