title_body: Epub -> Mobi/Azw3 conversion (calibre) , Kindle App doesn't show cover no matter what
upvoted_answer: Everything works fine except the book covers don't show up in kindle app. 
  
  
  Unfortunately, that's the default behavior, because the Kindle for PC/OSX app will only display covers for "personal documents," i.e. ePubs converted with Kindle Previewer/KindleGen, or books bought from Amazon.
  
  AFAIK, Calibre adds a fake ASIN and changes other metadata items so that books no longer appear in the Personal Documents folder. However, this change also causes the book to be displayed without a cover in the Kindle for PC/OSX apps.
  
  
    Everything works fine except the book covers don't show up in kindle app. There's no description also, so it's impossible to recognise which book I'm opening.
  
  
  To display the book titles, click the hamburger icon (≡) in the Kindle app toolbar.