O2 has launched My O2, an official iPhone app to monitor your usage, and see just how much money you threw away when you signed that 18-month contract Richard Trenholm was CNET's film and TV editor, ...

The 'My O2' application is currently only showing up as available for my Z10 but I would expect a roll out to the other BlackBerry 10 devices in the near future.

Have you got a money concern you'd like to talk about? Whether you've been ripped off by a rogue retailer, a dodgy firm or mistreated by your bank, we'd like to hear from you. Mirror Money's Emma ...