The staff provides guided tours of the castle and you can also rent an audio tour online or in the visitor information area. (edinburgh.ie)
When available, extras will appear below the main information area. (support.plex.tv)
There's only one widget pre-loaded, called Circles, and it's a nice little information area that offers the time, weather, and battery level at a glance plus a few other bits of info if you swipe it. (digitaltrends.com)