SafeWalk is an app that finds the safest routes between locations in New York City at any time of day. It uses open crime data from NYC along with algorithms like Dijkstra's to associate crimes with roads and find the shortest path that minimizes exposure to crime, based on crime type and time of day. The app allows users to indicate their personal fear of crime level to adjust the route accordingly, from rational to paranoid. It aims to show that NYC is generally safe but that one's perceived fear influences the chosen path.