Sorry to bump and old thread, but no point starting a new one, right?
Tomos, how have you got on with your monitor?  Could you link to the one you have?
I want to use mine with Strava and JeFit.  I find Endomondo would stop working too easily in the middle of a ride.
Also, if it matters, I'm using a Galaxy S3.  It worries me many of the monitors specify which devices they work with, Bluetooth should be a universal standard, no?