By far the best for Apple Watch

Ive tried them all, strava,runtastic,and many others. This one is by far the best in terms of features for Apple Watch. Heart rate etc... I did notice it would be off on distance by about .15-.20 after a 5 mile run when I compare it to a garmin watch. But I feel thats not too bad. Highly recommend this one.

MountainCrab about iSmoothRun