Table 3.

Selected sensor metadata from the U01 studies

		Project
Device	Feature	MAPS	SMART	BLS	TIME	DMB	MARS	CoTwins
Phone	Platform	EARSa	Beiweb, LifeDatac	Beiwe	Custom software	HeartStepsd	mCerebrume	Custom software
	OS/ Device	iOS + Android	iOS + Android	iOS + Android	Android	iOS + Android	Android	iOS + Android
	Device owner	Participant	Participant	Participant	Participant	Participant	Study	Participant
	Accelerometer sampling rate	50 Hz	10 Hz	10 Hz	~50 Hz	–	250Hz	–
	Location sampling rate	~Every 15 minf	~Every 10 minf	~Every 2–10 minf	~Every minutef	~Every 5 minf	Every 30 s	Every 5 min on Android; iOSf
Wearable	Device	–	Empatica Embrace	GENEactiv Original	Fossil Sport Gen 4/5f	Fitbit Versa	MotionSense	–
	Charging	–	Once per day	Monthly	Once per day	Once per day	Once per day	–
	Location (wrist)	–	Dominant	Nondominant	Wrist	Nondominant	Both	–
	Accelerometer sampling rate	–	32 Hz	20 Hz	~50 Hz	–	250 Hz	–
	Gyroscope sampling rate	–	–	–	–	–	250 Hz	–
	Physio sampling rate	–	1 Hz (temperature); 4 Hz (EDA)	20 Hz	–	0.2 Hz	200 Hz	–
	Accelerometer g range	–	±16 g	±9 g	±8 g	–	±2 g	–

Physio = Physiological data; iOS=iPhone operating system; EDA = Electrodermal activity;

^aSee Ref. [31];

^bSee https://www.hsph.harvard.edu/onnela-lab/beiwe-research-platform/; Ref. [29].

^cSee https://www.lifedatacorp.com/.

^dSee Ref. [32];

^eSee Ref. [33].

^fVaries by device or across participants.