Table 1.

Descriptions and features of the ActiGraph accelerometer, and the Movband, Sqord, and Zamzee activity trackers.

Device	Placement	Output	Features
ActiGraph GT3X+ (ActiGraph, LLC, Pensacola, FL)	Above right hip; elastic belt	Vector Magnitude Counts from raw (30-Hz) tri-axial acceleration signal	No display; no user interface
Movband Model 2 (Movable, Inc Brecksville, OH)	Dominant wrist	“Moves” based on tri-axial accelerometer and proprietary algorithm	Display screen; upload to website for tracking and group participation
Sqord (Sqord, Inc Durham, NC)	Dominant wrist	Activity “Points” based on tri-axial accelerometer and proprietary algorithm	No display; upload to website (tracking, groups/social network, avatar, challenges)
Zamzee (Hope Lab, NPO, Redwood City, CA)	Above right hip; elastic belt	Activity “Pointz” based on tri-axial accelerometer and proprietary algorithm	No display; upload to website (tracking, groups/social network, avatar, challenges)