Table 2.
Summary of social comparison data extracted from each review of physical activity apps.
| Author and year | SCa definition | Apps with SC as a category, n (%) | SC features | Apps specifying the SC dimension, n (%) | Apps with SC tailoring, n (%) |
| Azar et al (2013) [35] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Bardus et al (2016) [4] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Bondaronek et al (2018) [36] | Michie et al (2013) [13] | 43 (66)b | Not mentioned | 43 (66)b (comparison of behavior) | Not mentioned |
| Brannon and Cushing (2015) [37] | Abraham and Michie (2008) [9] | 9 (14)c | “Most commonly be seen in the case of group practice but could also be employed using detailed case studies in text or video or by pairing people as supports.” | Not mentioned | Not mentioned |
| Breton et al (2011) [38] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Conroy et al (2014) [29] | Michie et al (2011) [54] | 25 (15.0)d | Not mentioned | Not mentioned | Not mentioned |
| Direito et al (2014) [39] | Abraham and Michie (2008) [9] | 22 (55)e | Not mentioned | Not mentioned | Not mentioned |
| Dute et al (2016) [33] | Abraham and Michie (2008) [9] | 1 (8)f | Activity sharing and connection to a partner whose activities are visible | 4 (33)f (sharing activities) | Not mentioned |
| Jee (2017) [40] | Not mentioned | Not mentioned | Competitions | Not specified | Not mentioned |
| Jeon et al (2014) [41] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Knight et al (2015) [30] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Middelweerd et al (2014) [3] | Abraham and Michie (2008) [9] | 10 (16)g | Not mentioned | Not mentioned | Not mentioned |
| Modave et al (2015) [42] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Nikolaou and Lean (2017) [34] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Payne et al (2015) [43] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Quelly et al (2016) [44] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Rivera et al (2016) [5] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Schoeppe et al (2016) [45] | Not mentioned | Not mentioned | Social comparison with friends via leaderboards | Not specified (comparison of physical activity behavior) | Not mentioned |
| Schoeppe et al (2017) [46] | Abraham and Michie (2008) [9] | 10 (40)h | Competitions, leaderboards | Not specified | Not mentioned |
| Schoffman et al (2013) [47] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Stuckey et al (2017) [48] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Vlahu-Gjorgievska et al (2018) [49] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Wang et al (2015) [50] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Wearing et al (2014) [51] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| West et al (2012) [52] | Not mentioned | Not mentioned | Not mentioned | Not mentioned | Not mentioned |
| Yang et al (2015) [53] | Michie et al (2013) [13] | 25 (25.0)i | Not specified | Not specified | Not mentioned |
aSC: social comparison.
bN=65.
cN=66.
dN=167.
eN=40.
fN=12.
gN=64.
hN=25.
iN=100.