Table 2.

Procedure for evaluation of the apps.

Reference	Area of assessment	Object of the assessment	Basis of the assessment criteria (includes legal framework)
Papageorgiou et al, 2018 [6]	Privacy and security	In-app information Static and dynamic analyses App communications Existence of a privacy policy Content of the privacy policy	Authors Legal
Minen et al, 2018 [14]	Privacy	Static and dynamic analyses App communications Existence of a privacy policy Content of the privacy policy	Authors
Huckvale et al, 2019 [15]	Privacy	In-app information App communications Existence of a privacy policy Content of the privacy policy	Literature
Scott et al, 2015 [19]	Privacy and security	App properties and behavior Existence of a privacy policy	Literature
Brüggemann et al, 2016 [20]	Privacy	App properties and behavior Personal information types App communications	Authors Literature
Mense et al, 2016 [21]	Privacy	App communications	Author
Hutton et al, 2018 [22]	Privacy	App properties and behavior In-app information Existence of a privacy policy Content of the privacy policy	Literature Legal Recommendations or principles
Zapata et al, 2014 [23]	Privacy	App properties and behavior Existence of a privacy policy	Literature Legal
Sunyaev et al, 2015 [24]	Privacy	Existence of a privacy policy Content of the privacy policy Legibility of the privacy policy	Authors
Leigh et al, 2017 [25]	Multidimensional	In-app information Existence of a privacy policy Content of the privacy policy	Legal Recommendations or principles
Baumel et al, 2017 [26]	Multidimensional	Existence of a privacy policy Content of the privacy policy	Literature
Bachiri et al, 2018 [27]	Privacy	App properties and behavior Existence of a privacy policy	Literature Legal Recommendations or principles
de las Aguas Robustillo Cortés et al, 2014 [28]	Multidimensional	App properties and behavior In-app information	Recommendations or principles
Quevedo-Rodríguez and Wagner, 2019 [29]	Multidimensional	App properties and behavior In-app information Existence of a privacy policy Content of the privacy policy	Recommendations or principles
Knorr et al, 2015 [30]	Privacy and security	Legibility of the privacy policy	Recommendations or principles
Zapata et al, 2014 [31]	Privacy	App properties and behavior Existence of a privacy policy Content of the privacy policy	Authors Recommendations or principles
Bondaronek et al, 2018 [32]	Privacy and security	Existence of a privacy policy Content of the privacy policy	Recommendations or principles
O’Laughlin et al, 2019 [33]	Privacy	Existence of a privacy policy Content of the privacy policy	Authors
Adhikari et al, 2014 [34]	Privacy and security	App properties and behavior In-app information Existence of a privacy policy	Literature
Aliasgari et al, 2018 [35]	Privacy and security	App communications	Legal
Mense et al, 2016 [36]	Privacy and security	App communications	Authors Recommendations or principles
Powell el al, 2018 [37]	Privacy	Existence of a privacy policy Legibility of the privacy policy	Authors
Huckvale et al, 2015 [38]	Privacy and security	App properties and behavior In-app information Static and dynamic analyses App communications Existence of a privacy policy Content of the privacy policy	Legal
Robillard et al, 2019 [39]	Privacy	Existence of a privacy policy Content of the privacy policy Legibility of the privacy policy	Authors Literature