One of the best available - but having some problems with in-app upgrades – SkySafari 6 Pro Review

This is a remarkable tool and is definitely great for serious stargazers as well those new to the hobby. However, as mentioned by others, the in-App purchases look to be very interesting, but have problems installing correctly. For instance, I purchased the Apollo Missions add on and, despite my best efforts, it still won’t launch. I even uninstalled and reinstalled the whole app and still no success. Maybe it’s not compatible with Apple’s newest OS? Who knows. But I am unable to get any support from the developers in the forum. At this point, I wished I could get a refund. It‘a not much money...but it is the principle. They need to remove them until the problem is fixed.
Review by AmillVmill on SkySafari 6 Pro.