Hi guys. I'm running the London Marathon tomorrow and would like to do so with my Apple Watch (and iPhone of course). I've run a few marathons, so I'm comfortable with the distance and happy to experiment with the watch (going against the standard advice of "nothing new on race day"). I have used Adidas Micoach during training, but they don't have a watch app. I am trying to decide which app to use on the iPhone and watch. It seems to me that Strava, Runkeeper and Nike+ are the three options. However a quick test seems to suggest that none of them display heart rate data. Am I correct in that understanding? It's not a complete deal breaker, but a little disappointing. The fourth option is to run Adidas Micoach on my phone as normal, and run the Workout app on the watch. That way I get my exportable data in Micoach, but also have the full range of data (including heart rate) for instant consumption on my wrist. Any thoughts as to if the phone/battery could handle this? I'm a sub 3h15 runner, so won't be on the course all day. Overall, any advice/thoughts would be appreciated, and I'll naturally report back after the race.