John Miller wrote: How many aircraft can we track at one time? If I am tracking an aircraft and then try to add another , the tracking on the 1st ends.
 You should be able to track an unlimited number of aircraft/traffic.   I just tested it now to confirm.  If for some reason the tracking on an aircraft is lost, it should only happen if the ADS-B traffic report changes the Identifier for that aircraft, which then makes iFly believe it's a new aircraft.   But this shouldn't happen (and normally doesn't).