Lark was originally a sleep-monitoring device, app and coaching service that recently expanded beyond sleep to go after the broader, general wellness market. The TechCrunch Disrupt grad now combines, a nighttime and daytime wristband and iOS app to track basic fitness statistics, food eaten, sleep logged, calories burned, distance traveled, and so on.

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SOURCE:
HTTPS://TECHCRUNCH.COM/2013/01/02/BEST-HEALTH-APPS/