Finally, an app by a government-linked institution that doesn't suck. In fact, I would go so far as to say that the iChangi app is pretty slick.
This app allows you check arrival and departure times for Changi Airport. You can search by flight number, city or airline.
What sets this apart from a website is push notification. Select a flight as a favorite and the app will send you a notification when the status changes to "confirmed" and another notification when the flight's status is "landed".
The app is responsive and thoughtfully done. Clearly, someone has been paying attention to the user interface. When you attempt to search, the app brings up the full list of options which narrows as you tap out the flight or city name. A small touch but very nicely done.
This app is a must-have for anyone who regularly has to pick people up at the airport.
iChangi is free. Download it here.