You do NOT need the related app installed. For example, to use Evernote you do NOT need to have the Evernote app. Please see "What are Add-Ins and how do they work?" in this FAQ for a more detailed walkthrough.
You do NOT need the related app installed. For example, to use Evernote you do NOT need to have the Evernote app. Please see "What are Add-Ins and how do they work?" in this FAQ for a more detailed walkthrough.