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Table 4 Studies of percent of apps searched 2016–2018 that provide a privacy policy

From: Smartphones in mental health: a critical review of background issues, current status and future concerns

App searchSourceDates of searchCountry of searchNumber of appsPercent with privacy policy (%)Study
DepressionGoogle Play, Apple iTunes storeOct, 2017US11649%O’Loughlin et al. (2019)
DepressionGoogle Play, Apple App storeOct–Nov, 2018UK35374%Bowie-DaBreo et al. 2019
Depression and smoking cessation“official Android and iOS marketplaces”Jan, 2018US and Australia3669%Huckvale et al. (2019)
“mood” and “track”Google Play, Apple App storeJun–Aug, 2016; and Jan–Feb 2017aCanada319 IOS;
69 Android
18% for IOS; 4% AndroidbRobillard et al. (2019)
DementiaApple iTunes
Apr–May, 2016US7246%Rosenfeld et al. (2017)
Specific diseases including mental illnessesGoogle Play, Apple iTunes storeJuly 2018US40 each for anxiety, schizophrenia, depression, addiction85%-anxiety; 50%-schizophrenia; 85%-depression;
Wisniewski et al. (2019)
MigraineGoogle Play, Apple App store, healthline.comJuly–Aug, 2017US2976%Minen et al. (2018)
Mental HealthGoogle PlayMay–Jun, 2017India82c35%Powell et al. (2018)
Increase physical activityGoogle Play, Apple iTunes storeOct, 2016UK6570%Bondaronek et al. (2018)
  1. Apps in English
  2. aPersonnel communication
  3. bTerms of agreement present for 15% of Apple and 3% of Android
  4. cApps in English of Indian origin