Excellent Execution
I have completed 4 ironman and 5 half ironman races and this app is one of the simplest to use while delivering all of the information that you need when people are tracking you or you want to review comparative performance post race. It allows you to easily follow multiple athletes, all the while getting timely updates. If you are serious about racing to win, family members could easily track your competition and call out your advantage/disadvantage on the group. In addition to the app itself, the support team has been excellent, if there are issues with an entry (or lack therof) they are quick to respond to try and sort out any problems. Perhaps the only downside is that you are tied to Ironman branded races in order to use the app.
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IronMobile - Ironman Tracker, v1.7.3