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. 2022 Mar 9;24(3):e28942. doi: 10.2196/28942

Table 3.

Technical features and quality assurance of included apps (N=58).

Characteristics Android (n=29), n (%) iOS (n=29), n (%) Total (N=58), n (%)
App credibility

App content referenced or signed by the author 17 (59) 13 (45) 30 (52)

Includes disclaimer: information does not replace health care provider’s advice 11 (38) 13 (45) 24 (41)

App development team included the following


Government agency or academic institution or NGOa 4 (14) 8 (28) 12 (21)


Health care professional 11 (38) 14 (48) 25 (43)


Not declared 14 (48) 7 (24) 21 (36)
Data privacy

Authentication required to access app 13 (45) 21 (72) 34 (59)

App includes a privacy policy 23 (79) 22 (76) 45 (78)


Presented before account creation 14 (61) 10 (45) 24 (53)


Explains how data are collected 23 (100) 22 (100) 45 (100)


Shares information with third party providers 20 (87) 20 (91) 40 (89)


Contact details of data protection officer provided 4 (17) 9 (41) 13 (29)

App allows users to share data 6 (21) 7 (24) 13 (22)
In-app advertisements (for details, please see text in this section) 8 (28) 2 (7) 10 (17)

aNGO: nongovernmental organization.