You are downloading the Everything Arduino AppXBundle file v2015.806.946.0 for Windows Phone. Everything Arduino is a free and useful Books & Reference app: Everything Arduino:Its your fast-track learning to the Open-source Hardware Arduino.This app starts with what is arduino?? and leads you to ... You can now download the offline AppXBundle file to install & try it.
Download Locations for Everything Arduino 2015.806.946.0 AppXBundle file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline AppXBundle File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Everything Arduino AppXBundle file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.