Table 4.

Android apps subgroup analysis according to number of downloads (N=29).

Feature					>10,000 downloads (n=14), n (%)			1000-10,000 downloads (n=15), n (%)			P valuea
App store category											.75
	Education			1 (7)			3 (20)
	Health and fitness			9 (64)			8 (53)
	Lifestyle			0 (0)			1 (7)
	Medical			4 (29)			3 (20)
App store rating (stars)											.09
	3.6 to 5			13 (93)			9 (60)
	1 to 3.5			1 (7)			2 (13)
	No ratings			0 (0)			4 (27)
App cost											.06
	Free			6 (43)			12 (80)
	Free + in-app purchase			8 (57)			3 (20)
	Paid			0 (0)			0 (0)
Type of app											.07
	Information and education			2 (14)			8 (53)
	Disease management with education section			10 (71)			6 (40)
	Education disease management section			1 (7)			0 (0)
	Multimedia education			1 (7)			1 (7)
Number of education topics											.66
	<10			3 (21)			4 (27)
	10-20			8 (57)			10 (67)
	>20			3 (21)			1 (7)
Peer-support communities					2 (14)			0 (0)			.22
Non–evidence-based information					3 (21)			7 (47)			.25
Depression education
	General information on depression
		Personal narratives of depression	4 (29)			2 (13)			.39
		Depression is different from sadness	11 (79)			9 (60)			.43
		Demographic and epidemiological facts	9 (64)			6 (40)			.35
		Natural history of the disease	6 (43)			0 (0)			.006
		Lists symptoms of depression	14 (100)			12 (80)			.22
		Explains what recurrence and relapse are	4 (29)			5 (33)			.99
		Addresses stigma linked to depression	7 (50)			4 (27)			.36
		Mentions suicide risk linked to depression	12 (86)			11 (73)			.65
	Screening of depression
		Describes diagnostic criteria of depression	4 (29)			3 (20)			.69
		Administers a screening questionnaire	7 (50)			4 (27)			.36
		Explains need for a confirmatory diagnosis after screening	4 (29)			3 (20)			.68
	Treatment of depression
		Importance of seeking help	12 (86)			11 (73)			.65
		Advises to seek specialist treatment	9 (64)			13 (87)			.21
		Importance of involving support network	9 (64)			7 (47)			.56
		Importance of complying with treatment	4 (29)			4 (27)			.99
		Lists available treatments	11 (79)			12 (80)			.99
		Importance of lifestyle changes	10 (71)			8 (53)			.53
		Lists complementary medicine options	0 (0)			3 (20)			.22
		Offers emergency helpline phone numbers	10 (71)			6 (40)			.18
		Prognosis in patients receiving treatment	5 (36)			0 (0)			.02
		Addresses recovery and provides a hopeful outlook	2 (14)			2 (13)			.99
App credibility
	App content referenced or signed by author			12 (86)			5 (33)			.012
	Include disclaimer: information does not replace health care provider’s advice			7 (50)			4 (27)			.36
	App development team included the following										.11
		Government agency or academic institution or NGOb	2 (14)			2 (13)
		Health care professional	8 (57)			3 (20)
		Not declared	4 (29)			10 (67)
Data privacy
	Authentication required to access app			9 (64)			4 (27)			.10
	App includes a privacy policy			12 (86)			11 (73)			.65
		Presented before account creation	9 (64)			5 (33)			.20
		Explains how data are collected	12 (86)			11 (73)			.65
		Shares information with third party providers	10 (71)			10 (67)			.99
		Contact details of data protection officer provided	4 (29)			0 (0)			.04
In-app advertisements					2 (14)			6 (40)			.21

^aStatistically significant values in italics.

^bNGO: nongovernmental organization.