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I haven't tried that particular one, Bill, but there are a number of similar apps, and PC programs that I have used. I find the location-based ones a bit of a gimmick; interesting for a little while, but nothing beats the real thing.
More comprehensive applications, such as Red Shift, can be a great tool for the amateur astronomer. I use it more for checking what's where and printing out star maps of small areas of interest than actually in the field. Great for locating where, for example, Uranus is going to be tonight, or when to expect transits of the Jovian moons.
They do allow you to control a computer controlled telescope, but I can't be bothered to drag a computer into the garden and hook it up to my telescope. Anyway, nothing beats a bit of point and nudge.
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