Ditto.. I'm unable to sign on using the Evernote app on my Kindle Fire HDX whereas I'd no problem accessing Evernote on my Android-based Samsung S5. In fact, according to the information found in the Google Play Store, Version 7.0.7 of Evernote was updated today, August 20, 2015. I'd no problem accessing this Evernote Forum via Evernote.com using the Silk Browser on my Kindle Fire HDX. The problem seems to exist within the app itself... has Evernote decided not write updates that'd include support of the app for Kindle Fire HDX platform users? Is there a problem between Amazon and Evernote that's creating the access issues for users of android-based Kindle Fire HDX? Or was updating that portion of the Android-based app that impacts Kindle Fire HDX simply overlooked?.... Guess I'll be sending a note to the Kindle Fire HDX support team to find out with whom the problem resides - Amazon or Evernote?