The maintenance of XC Skies is poor at best. Pretty wretched for a subscription-based product.
Look at the home page regarding the IOS app: "Android based devices will be available late spring, 2012." for a reality check.
http://www.xcskies.com/
Still no convergence, called "BL Max Up/Down Motion" in BLIPMAPs, which was supposed to be added years ago.
Check out the XC Skies Forum for more evidence. Most recent questions are unanswered. The most popular topic: "The end of XC Skies?"
https://groups.google.com/forum/#!forum/xcskies
I am another subscriber who would rather this was not the case. My registration on the XC Skies forum has had the following message for well over a year:
"Your membership is pending"
Jim, your subscription is probably pending, too.
Jim