Table 2.

Characteristics of health apps and health app use.

Item		Statistics
App use, n (%)		402 (100)
Perceived effectiveness, mean (SD)		3.79 (0.73)
Frequency of app use, n (%)
	<once a month	22 (5.5)
	Several times a month	79 (19.7)
	Several times a week	115 (28.6)
	Once a day	104 (25.9)
	Several times a day	82 (20.4)
Duration of app use, n (%)
	<1 month	43 (10.7)
	<6 months	116 (28.9)
	<1 year	90 (22.4)
	>1 year	153 (38.1)
Behaviors targeted by the apps, n (%)
	Physical activity	289 (71.9)
	Nutrition	146 (36.3)
	Weight loss	150 (37.3)
	Measuring, for example, blood pressure, blood sugar, and step counter	184 (45.8)
	Sleep control	123 (30.6)
	See patient’s chart or labs	21 (5.2)
	Relaxation	30 (7.5)
	Records on disease	61 (15.2)
	Stop health detrimental behavior	16 (4.0)
	Contact doctor	23 (5.7)
	Medication adherence	34 (8.5)
	Health information	28 (7.0)
	Other	10 (2.5)
Behavior change techniques, n (%)
	Providing information	101 (25.1)
	Prompting self-monitoring of behavior	236 (58.7)
	Prompting barrier identification	33 (8.2)
	Prompting specific goal setting	224 (55.7)
	Providing instruction	108 (26.9)
	Providing feedback on performance	199 (49.5)
	Providing instruction	58 (14.4)
	Providing opportunities for social comparison	54 (13.4)
	Planning social support	32 (8.0)
	Relapse prevention	23 (5.7)
	Training Emotional control	37 (9.2)
	No BCT	34 (8.5)
	Wearables used routinely	97 (24.1)