Radarcoptero, the road radar for DGT helicopters

Why it surfaced

Radarcoptero turns helicopter tracking into a remarkably specific driving companion: it scans a 60-kilometre radius every three seconds and distinguishes alleged Pegasus aircraft from Colibrí helicopters. The page is unusually candid about its limits, warning that missing an alert does not mean the sky is clear and that drivers must not interact with the app while driving.

A free Android app that uses public ADS-B signals to detect nearby DGT helicopters and issue voice, vibration, and background alerts.