NextThere

If you want to know when the next train, bus, ferry or tram to your destination will arrive, you need NextThere. It's simple, fast and real-time - like having a platform indicator in the palm of your hand. It knows where you are, and with a tap you can see just the services to your destination.
• Save up to 3 stations, stops and routes you use public transport from and you'll see the next services due to depart
• Tap on a service to track your trip live
• Live train and bus load data (where available)
• Detailed alerts about disruptions, service changes and trackwork
• All in a simple, gorgeous interface designed for iOS
• VoiceOver support
NextThere covers public transport in these cities on your iPhone, iPad and Apple Watch - for free!
Australia: Sydney, Melbourne, Brisbane, Adelaide, Perth, Canberra, Hobart, Darwin, Alice Springs, Gold Coast, plus regional towns in Queensland, Tasmania and Western Australia
New Zealand: Auckland, Wellington, Christchurch
United States: San Francisco, Boston, Portland, Seattle, Honolulu
If you want some extra awesome features, you can subscribe to NextThere Pro:
• Tap "Go" to receive walking directions and boarding/alighting notifications as your service approaches the stop
• Home Screen and Lock Screen widgets to see nearby upcoming services
• Save as many stops as you like - non-subscribers are limited to three
• Receive push notifications about incidents and disruptions so you're always up to date
• View run numbers and other internal info from rail operators
• Remove all ads
• Access to themes
• Access to additional settings to customise the appearance and function of the app
The subscription is optional and available in periods of either 1 month or 1 year. Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of use can be found at http://nextthere.com/support/terms.html.
Check http://nextthere.com/coverage for details on the real-time data is available in your area.