Complex sentence: Timex has developed an application called "WristApp SDK Installer" which can facilitate the import of any independently developed "wrist app" into the Datalink USB computer interface and thus make it part of the downloadable program menu in the GUI of the watch.
Split into simpler sentences: Timex has developed an application called "WristApp SDK Installer". This application can facilitate the import of any independently developed "wrist app" into the Datalink USB computer interface, and thus make it part of the downloadable program menu in the GUI of the watch.