PP has two ways of calculating location. Unless you are only interested in aircraft within a few tens of miles from you, the best option is the more complicated sounding one. I can't remember what it's called right now and my online searching doesn't turn it up. It has something to do with using curved surface calculations instead of flat.
Contrary to statements earlier in this thread, using and sharing with PlanePlotter is not obsolete or limited. PP has the largest sharing network, both in terms of area covered and number of sharers. The software allows sharing to the user's choice of several other networks, such as FR24, FlightAware, etc. The PlanePlotter network, unlike the other paid services, does not impose delays on tracking data within the network.
Nobody really benefits when someone comes out with a new platform and then insists upon creating their own sharing network. All we get is a larger number of smaller groups sharing less data.