The GPS on my phone KILLS the battery life. If you going on a decent ride which I will be once i have the fitness required, then you'll need a portable battery of some sort.
Is it not possible for a speed and candence sensor to track distance without gps signal? Mine doesn't seem to be working. IT's one of these
I.e. have I bought something that doesn't do what i need it to do.
the fallowfield loop isn't 0.06km long