Free to order for British Gas customer at the moment. I am their customer for an electricity. Just order one. It is totally free for the device.
- Monitor your usage with a free electricity monitor
- Take control with accurate monthly billing
- Compare your energy usage and get personalised advice
- Submit your monthly meter reading online, via iPhone app or by SMS
- Choose from a flexible range of tariffs
They call it EnergySmart. You can have a look for more details at their website.http://www.britishgas.co.uk/products-and-services/energy/our-tariffs/energysmart.html