Warn-App-Companion

Warn-App-Companion is a privacy-focused Chrome extension designed to provide detailed insights into your Covid-19 exposure risk. By accessing the rolling proximity IDs stored by your device (root access required) or importing databases via RaMBLE or microG apps, it compares your contact data against published exposure keys from multiple countries. Users can view encounter times, approximate distances, and risk levels, with optional geographic mapping in RaMBLE mode. The extension maintains strong privacy by not processing personal data, solely downloading public warning server data without transmitting your information. Supported countries include Germany, Denmark, Canada, and others, with open-source transparency on GitHub for user trust and community contributions. This tool empowers users with better understanding of their exposure history in a secure, ad-free environment.