I've written about my Pebble before and the things that I like about it.
This week a new firmware and app version got pushed out and I noticed that after tracking health data for some time (steps and sleep), the iOS app finally got a reporting screen for it.
I thought it was worthwhile looking at, since it has a really nice reporting graph. Rather than simply reporting the number of steps and sleep hours, it gives an area plot showing current and typical data.
This is a big improvement over the iOS Health app reporting, which shows you the daily average, but doesn't give you anywhere near the level of comparison between your typical activity and current activity.
Additionally, the health settings has an "Insights" section, which presumably gives you feedback on your habits.