I got a Fitbit surge for Christmas and have been running with it a few times.  Last night I thought it might die during my run so I ran with the Surge and my phone with the RunKeeper app. Now starting off they were only about .02 apart from each other.  Which isn't bad and I wouldn't really worry about it, but as the run went along they started getting farther apart.  By the end of the run they were over a .10 apart.  My question is which one do you think would be more accurate?  Its not a huge deal to me since they are only about a .10 apart after a run.  Just wondering which one y'all think might be right.