Hatch is a location-based mobile messaging app built with Node, Express, Postgres, and React Native. It allows you to send messages that that the recipient can read when they are physically located within a certain geofence. We call it Hatch as a play on the Easter egg concept - an intentional inside joke, a hidden message, or a secret feature of an interactive work (often, a computer program or video game). It uses the Facebook SDK to connect users with their Facebook friends, encodes images in base64 for secure server-side storage, and sets up geofences that are approximately 1/2 block radius from the user-selected location.
