title_body: Testing a reader's EPUB 3.0 support
upvoted_answer: There is; EPUBtest provides a detailed grid of supported features by reader, app, and platform, as well as an extensive test suite for conducting your own tests.
  
  For example, as of January 31, 2014, Kindle for PC 1.10.6 on Windows 7 has very limited support:
  
  
  
  Note: I have no affiliation with EPUBtest; I just thought it was a handy tool.