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I use Strava, and have been holding out on getting a watch. Is NRC + RunGap good enough for the time being?
I've done around 12-13 runs with NRC since it was updated on my Series 2, some watch only, some with my phone. Twice, my maps haven't updated for whatever reason. Also, occasionally the update to Run Gap would take a few hours. SOMETIMES.
For this reason, I'm still wearing my Garmin on the other arm, until the bugs are worked out.
Also, you'll get no elevation in the Nike app, but Strava will calculate it for you.
So I'd say give it a go if you're okay with those percentages.