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ChemTracker is a real-time flight tracking application that predicts whether aircraft overhead are producing visible contrails. Developed by CCC Impact BV (Netherlands), ChemTracker uses live ADS-B flight data from a global receiver network, atmospheric conditions from 8 pressure levels via Open-Meteo, and the Schmidt-Appleman thermodynamic criterion to analyze every aircraft within 250 kilometers of the user's position. The app runs Monte Carlo simulations (25–50 evaluations per aircraft) and factors in solar visibility to determine if contrails are visible from the ground. ChemTracker is available worldwide as a progressive web app with a 14-day free trial.
Real-time flight tracking and contrail detection. See which aircraft are leaving trails above you. Powered by atmospheric science.
ChemTracker shows you every aircraft in your area and predicts which ones are producing visible contrails. Using live ADS-B flight data, atmospheric conditions at 8 pressure levels, and the Schmidt-Appleman thermodynamic criterion, it runs Monte Carlo simulations to score each aircraft as CLEAR, DISPERSING, or SPRAYING. Point your phone at a trail in the sky to identify the plane. Track flights within 250 km, log sightings with photos, and explore community reports. Available worldwide with a 14-day free trial. No credit card required.
See every aircraft overhead and find out which ones are producing visible trails. Start your free 14-day trial — no credit card required.
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