The IP68 - certified Honor Band Z1 has a brushed metal bezel around the corners and come with features like activity, steps and sleep tracking using MyFitnessPal app integration. (techone3.in)
That said, Fitbit's other trackers do work with apps like MyFitnessPal as well as integrate with Withings, Runkeeper, MapMyRun, Endomondo - all of which offer support for HealthKit. (pocket-lint.com)