Originally Posted by DoctorOhh
Curious... what or who is preventing this?
Edit: You might want to include the required Calibre version in Amazon and Google Play stores.
Amazon doesn't seem to want alternate reader-related programs on the fire. Understandable from their point of view - protecting their "walled garden" and "user experience". In addition, the reader app (the equivalent of kindle for android) behaves differently from the non-fire app, at least on the fire my son has, making it difficult to integrate with.
Steven is going to talk with his marketing contact at Amazon to see what possibilities exist to overcome these challenges, if any.
Regarding the calibre version, you are right.