The app, which costs £3.99, has been developed with online TV outfit Livestation and works via Wi-Fi and 3g connections.
In addition to live streaming of all Five's games throughout 2009-2010 competition, a weekly highlights programme will also be available.
Five's head of digital media, Jonathan Lewis, the new service exemplified "Five's ambition to extend the reach of our long-form, ad-supported video content to as many platforms as possible, with the aim of generating additional incremental advertising revenues".
Five currently operates a catch-up service Demand Five, and is in the process of creating new content destinations including Holy Soap and FiveFWD.
Five is also a partner in Project Canvas, the joint venture between the BBC, ITV and BT.