|Quoting audidudi (Reply 10):|
Well when I see an aircraft flying over my house here in No. California, the Planefinder App will show the aircraft as it is actually flying in the sky. The FlightRadar24 App is delayed about 1-2 mins, so even though both are supposed to be "real time", Planefinder is the more accurate of the two in showing the aircraft's actual position relative to where it is in the sky!
-B data on FR24 is 100% real time. I have checked at least 100 times last 3 years. FAA data on FR24 is delayed by 5 minutes and this delay is made by FAA, so I guess there is not much FR24 can do about it.
-B data on Planefinder is about 10-30 seconds delayed, and planefinder are making some kind of strange position estimations that are far from correct. They continue to plot aircraft in a straight line for about 30 minutes after lost ADS
-B coverage. That gives a feeling of Planefinder having better coverage, but it's fake. You can see that on several locations, for example southern Spain, where aircraft bound to Malaga continue their flights for 30 minutes so they end up in Africa. FAA data on Planefinder is delayed 5 minutes as well, but Planefinder is moving aircraft forward 2-3 minutes, so it gives a feeling of the FAA data being almost real time, but once again it's fake. The estimated aircraft positions are not correct, so if you observe FAA data landings on a US airport, the aircraft often jumps around in circles or just continues past the airport, because Planefinder is correcting incorrect position estimations.
So first impression is that Planefinder have more and faster data, but much is just estimations that are not correct. That is why I recommend FR24 that only shows real transponder data, and not incorrect estimations.