With the Mavention Documents I Viewed App for SharePoint you can easily access documents that you have recently viewed. Your recently viewed documents are presented as cards and the app is great addition to Office Delve.
The Mavention Documents I Viewed app shows the list of documents which you have recently viewed. This information is available only to you and no one else but you can see which documents you have recently viewed.
This app requires Office Graph to work correctly. If you don't have Office Graph on your tenant, you will see standard search results rather than documents that you have recently viewed.