There is a lot of talk in the media about applications that run on a mobile device
Many of these applications are games or productivity tools like scheduling or notification software.
These applications run natively on a mobile device - rather than being content that is simply viewed through a mobile browser.
They need to be downloaded and installed on the mobile platform. This also means that the application needs to be re-designed and rebuilt for each type of platform/operating system (Blackberry, Windows Mobile, Android, etc.)