iPhone HRM App Suggestions/Reviews Wanted

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I have a Polar H7 on the way, and wondered what iPhone or iPad apps people use with their hrms.

1) I currently use runkeeper to track my runs, walks, and time on the running machine, but it looks like it won't track HR for my rowing machine sessions. (unless maybe I tell it that i'm running and then edit the session later)

2) From a forum search,nit looks like Digifit is popular. I'd love to hear people's thoughts and any alternate recommendations. Mostly, I'd like to have my iPad display hr while I'm rowing and maybe track it for later analysis.

Thanks!