Windows Phone — Xap Archive Link

: Using these files isn't "plug-and-play." Users must deal with developer unlocking, interop-unlocking, and deploying tools like the Windows Phone SDK or WPPT , which have a steep learning curve.

(pronounced "zap") format is a compressed ZIP archive used to distribute and install application software on Windows Phone 7, 8, and 8.1. While later versions of the platform (Windows Phone 8.1 and Windows 10 Mobile) transitioned toward the windows phone xap archive