OfficeDevShow - Episode 14 - Getting Started Experience on Dev Office

Office Dev Show - Episode 15 - Getting Started with Office Add-ins
In this episode of the Office Dev Show, Rich and Sonya go through the two getting started experiences of building Office Add-ins in Visual Studio, as well as using the Yoeman Generator - Yo Office.
Get started building add-ins today, regardless of your favorite platform and language.
Happy Coding!
So just to be clear with this episode that this is essentially the building block of all office addins?
So whether I want a graph addin for excel that say uses d3js to make a chart I would need to complete the steps in this episode?
Do these addins also work on Word Mobile (on iOS, Android, Windows) ?