ADS-B Exchange has free and paid API services to those who set up a feeder to collect data and commercial users, respectively. The revenue from paid API access is used to offset the costs of collecting and storing the data. ADSBexchange data collection requires that one can freely participate...
d4rken/adsb-meta-tracker- An android ADS-B Meta Tracker that shows metadata about ADS-B aggregators. Social WarningSome ADS-B USB receivers already contain an onboard filter. FlightAware Signal filters- Different signal filters made by FlightAware. ...