Runkeeper vs Cardiotrainer apps

tiggertail

Hi all. Just trying to find others opinions on which they think is best.
I currently use cardiotrainer but am finding the GPS is sometimes a bit dodgy on my runs (the same run can register as 10.6 or 12.4km!) was wondering if the Runkeeper is as easy to use tho & whether it's worth swapping apps.
Cheers for your thoughts.