SPARROWMAP is a crowdsourced system that lets volunteers point a spare phone at a street to capture passing vehicles. The device reads license plates, retains only government vehicles, and destroys all other data locally before anything leaves the hardware. The live map shows these government plates as a public record, emphasizing that public money, roads, and vehicles belong to everyone.

Running a camera requires no installation or account; it operates in a browser tab on an old phone, laptop webcam, or USB camera. Detection runs on the device, so no video feed is uploaded, protecting privacy. Setup is simple: on Windows, run `irm https://sparrowmap.com/install-node-windows.ps1 | iex` in PowerShell, or use the provided exe; on Linux, use `curl -fsSL https://sparrowmap.com/install-node-linux.sh | bash`.

Everything stays on your machine, with only plate detections sent to the server. The project is documented at sparrowmap.com and aims to increase transparency of official vehicle use.