Man, I thought I had a great opportunity to use Runmeter AW app more recently when my Bluetooth chest heart rate strap battery died. Figured I was good to go since Runmeter uses the AW heart rate now. But I think a recent update to Run,enter has caused to go on the fritz--it's giving me very inaccurate heart rate readings and also appears to not be updating some screens on the watch.
I hadn't dug into the problem much yet, but since I already had purchased iSmoothrun a while back but never really used it, decided to give it a go today. Whelp, I couldn't even manage to get the AW app to do anything. Force pressing the screen and choosing Start did nothing, so then I started the run from the phone, but the watch still wasn't displaying anything about the run, just a blank screen. I almost kept running except that I noticed the phone also wasn't getting any headrests info from the watch. So I just gave up and initiated the Apple workout app :-/
Sounds like neither Runmeter or ismoothrun are fully functional. Atleast Runmeter was able to start and stop my run from the watch and accurately tracked the run even if it stops updating the information on the watch screen. Strava is still the best I've seen even if it is simple. I am really looking forward to what apps come up with for running in the future but it sounds like for now the options are somewhat limited.