Best format
Ive used several different apps but this one is my favorite. They are all subject to delays since all the Ironman tracking apps are pulling from the same data. So it just comes down to which format you prefer and I think this is the clearest to follow.
I wish they would at some point update these to offer a time stamp of when they crossed the markers listed, but nobody does at this point. So, know the course, know your athlete and do the math on your own if you are trying to catch them in multiple stops on the course, unless you want to invest in an individual GPS tracker.
IMwife about
IronMobile - Ironman Tracker