SkyQI is a citizen-science platform founded by student inventor Suhani Gupta. Its cross-validation algorithm (Indian patent application 202611013909) computes sky brightness from smartphone photos consistently across different camera hardware — validated at 65.4% Bortle accuracy (±1 class) against human-labelled reference photographs.
Get the free SkyQI app: SkyQI - Light Pollution on the App Store (iOS) · SkyQI - Light Pollution Monitor on Google Play (Android)