Sydney Transport Rail Bus is a free navigation app developed by Transit Now ltd for iPhone users. This app is an all-in-one solution for your transportation needs in Sydney. It provides live bus and train times, step-by-step navigation, stop announcements, service alerts, and more.

With this app, you can plan your trip with up to five ways to your destination, share your journey details with friends and family, and get off alerts when it's time to transfer. You can also view live countdown boards for buses and trains, see exactly where your bus or train is on the map, and find out about delays and diversions before you leave.

The app allows you to save your favorite stops and stations, view full seven-day schedules, set schedule alarms and get reminders before your bus or train arrives. You can quickly see the last train or bus arriving tonight and access live and offline route maps. The one-tap ‘get me home’ journey planning feature is particularly handy.

Overall, Sydney Transport Rail Bus is a comprehensive navigation app that is simple and clean. It only shows you what you need to know and is easy to use. The only downside is that it requires data access and works best with GPS/location on, which can drain your battery.