SG NextBus is a travel and navigation application available for iPhone users. It provides quick access to bus arrival time information for frequently used buses in Singapore, even from the lock screen.

With SG NextBus, users can easily get estimated arrival times for the next three buses. The app also offers the convenience of receiving arrival time alerts through rich content notifications, even after closing the app.

For Apple Watch users, SG NextBus provides a dedicated app for easy access to bus arrival time information.

Additionally, the app offers a Today Widget that displays information about the nearest saved buses, accessible directly from the lock screen.

SG NextBus also provides information about bus capacity, including the availability of seats and standing space. Users can also organize their buses into groups for easier access.

Please note that SG NextBus utilizes bus arrival time data from the Land Transport Authority of Singapore, LTA.