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Bonus points: put up an RTL-SDR and feed them ADS-B data you receive. They will give you a free business account! ($50/mo value!!)

Flightradar24 does that? I thought that was FlightAware, but still awesome to know!

Yup have been doing it for about 3 years now. I love how much value I get in return of little I provide (relatively).

Client fully compatible with a Raspberry Pi, so minimal energy consumption too.