I downloaded the compass app and found it very good, surprised to find though that my presumed direction of 'South' is about 45 degrees out, what I thought was South is actually SouthWest.
Tracked my position with GPS against Google satellite view and was able to get a clearer idea of where the locations on the ground were versus the map, which was interesting. It'll be very useful when doing a management plan.
Also surprised quite how bright the LED torch app is, very useful.
I'm going to get a day-glo flip cover for the phone, not going to make the same mistake as all the nice dark black and green tools I bought (and have nearly lost within three feet of me). The 'phone locator' apps look useful, for when you forget where you left it.
Don't need the Night Sky map as A) I spent much of my youth on the roof of our bungalow learning the constellations & B) I've a mahussive bleeding computerised telescope with a 10" mirror which has the location of 40,000 objects of interest programmed in and will go straight to them for you. Lack of light pollution means occasional trundles with the telescope to the clearing in the wood are a 'must', it makes a huge difference to the viewing experience to get away from Cities and there are some staggering and beautiful things to see. You get a pretty good computerised 'scope for a few hundred quid these days, its yet another activity to enjoy in the woods.
And yes, the one thing I had trouble with my phone was working out how you answer a call !! Its so much easier when your butler does it, I find.