Hi Ian
The free apps tend to be quite limited in many ways - especially in reference to their catalogues. This "Go Sky Watch" app only offers a database of stars, as the blurb states, that are "visible to the naked eye". This makes it great for showing family and friends what's up there, but that's about all. There's no telescope control or any other higher functions. There are others for free that work just as well - my favourite being "Star Walk", and although it's a few bucks I still refer to it as basically "free" - they're not a lot of money. We're not starved for choice on iOS devices, that's for sure.
