From Evernote:
"As of June 29, 2017, we'll be discontinuing support for BlackBerry and Windows Phone. If you currently use Evernote on these platforms, you may continue to do so. Evernote, however, will no longer be available for download on these devices and we won't be making any further updates."
Fortunately, it seems as though the Windows version of the app is safe and sound, including the Evernote for PC app that's available as a separate listing on the Windows Store.