Office Add-ins (formerly Apps for Office)
Build an add-in that lives inside
Excel, Word, PowerPoint, or
Project to extend what you can do from right in the documents, across devices and platforms — like pulling content from the web, calling mapping services, locating news, translating text, and more.
SharePoint Add-ins (formerly Apps for SharePoint)
provider-hosted add-ins to use remote web applications, surface remote data, offload business logic, access SharePoint list data, integrate with Office applications and services, make SharePoint a portal for other applications, and more.