Last year in Toronto, I read from several people that there have been reports of attempted abductions when walking around at night.
The hope for Bachao was to present evidence to councillors so that something can be done about this. It uses Expo to create an Android and iOS user friendly way to record user location data, on an E2E encrypted server backend using Java to record location data. Nothing except for a unique hashed device ID, and the location is stored.
This project is currently a work in progress.