Bike GPS compatible with mapmyride app

nanas1
nanas1 Posts: 50
edited May 2013 in Road buying advice
Aright Guys,
I'm new here and want advice on a good GPS system to buy for my road bike, the system needs to be compatible with Mapmyride app which I am using on my iphone at the moment to track my progress and training history. The phone is only holding charge for around a 35-40 mile cycle, so need a dedicated GPS system that i can download at a later stage onto the mapmyride website.

Any help or advice would be greatly appreciated.