There may be a problem with ES File Explorer or even App Extractor between the Kindle & Google; BUT it is due to the resolution of the device & not the app.
e.g. I just tried ESFE to backup an app on the Nexus 7 & it worked (just got the ESFE update today to be the same as on my Tab Pro 8.4). Yesterday, the ESFE on the Tab Pro failed the backup, but the Nexus 7 backed up the app.
The problem is that the Nexus 7 resolution is at 1920x1080 while the Tab Pro is at 2560x1600. Most likely it is the same problem as the Aldiko reader where the bookshelf do show the cover page but the cover page is blank when opening the book & also a blank page when the page has an illustration.
So, sometimes an app may fail but not because it was from Google or Amazon. I even used an app extractor on the Tab Pro successfully but it wouldn't install on the Kindle Fire HDX 8.9 (2014).
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