Esri just released the latest version of Web AppBuilder for ArcGIS!
This blog does explain What’s New in Web AppBuilder for ArcGIS (December 2016) | ArcGIS Blog.
If you're not familiar with Web AppBuilder for ArcGIS you should have a look at Web AppBuilder for ArcGIS.
Any questions?
Feel free to send me your question or simply get in touch with the other Esri staff around here!