CityBus Odesa is a free Android app developed by d.u.a.l for tracking public transport in Odesa. The app allows users to track electric transport in real-time, including trams and trolleybuses. However, it's important to note that there is no tracking of buses, as GPS trackers are not mandatory for them in Odesa. The app's main function depends on the functioning of an external source of GPS data, and cooperation of the source and app is not guaranteed. Users can save their favourite routes and apply them in just a couple of taps. The app offers detailed views of all vehicles equipped with GPS trackers, and users can search for routes and stops using the map. The app's traffic optimization feature ensures that all useful information is already inside the app, making it accessible without using network.