Justo: Travel Safe & Fair
Born from my own travel experiences, Justo is a free iOS app available on the App Store across four Brazilian cities. It combines crime data, community alerts and price reports, one-tap SOS, and on-device face blurring.
The Problem
Travelers in Rio de Janeiro often face unfair pricing at restaurants, bars, and hotels, and lack real-time information about neighborhood safety. As a solo traveler and longtime Couchsurfer, I experienced this firsthand and wanted to build a solution that respected both travelers and locals.
The Solution
Justo combines community price reports with a safety heat map. Users can report venue prices, share safety incidents with automatic on-device face blurring, and access an SOS emergency button. The privacy flow was designed around LGPD-aware data handling.
Technical Highlights
Built natively in Swift for iOS, Justo uses Core ML for face detection and blurring before an incident photo is uploaded. MapKit powers the interactive heat map, community reports add local price context, and cached venue data supports limited use without a connection.