Did a 12k run and used the Outdoor Run App on my S3 and Nike Run Club on my phone to compare. Pretty accurate I would say. : r/AppleWatch
How to Track Steps & Mileage with iPhone to Make the Health App Useful | OSXDaily
How accurate is the Nike+ iPhone app in measuring distance? - Quora
Apple Watch Series 2 Run Distances VERY I… - Apple Community
We tested the best running apps and this one is our favorite. - Reviewed
What is more reliable of a distance measure for a run, Nike+ or the treadmill? - Quora
Has anyone experienced an inaccuracy in mileage/pace after the recent update? I've run the same route with the same time but I've got different mileage and pace! I know as a fact