Table 1.

Summary of evaluation studies organized by app type.

App type and name			Design		Duration	Participants		Findings
Planning apps
	App 39 (MyNutriCart) [43]	Cohort		8 wk		27 participants	Significant healthier diet balance of purchases
Contemplation apps
	App 5 [38]	Cohort		6 mo		251 participants	Significant increase in omega-3–rich purchases
Approach apps
	App 8 [44]	Cohort		7 mo		69 participants in the intervention group and 323 participants in the control group	Significant increase in higher-rated purchases
Selection apps
	App 22 (Dirk app) [41]	3 UIa variations (1 × presenting the alternative without information about its healthiness and 2 × with variations of information that indicate that the presented item concerns a healthier alternative) vs control		5 wk		1783 scansb	Significantly healthier purchases when presenting alternatives without health information and nonsignificantly healthier when adding health information
	App 30 (FoodSwitch) [45]	App vs no app		4 wk		33 participants in the intervention group and 33 participants in the control group	Significant reduction in sodium concentration in purchases
	App 30 (FoodSwitch) [46]	App+reduced-sodium salt vs no app		12 wk		84 participants in the intervention group and 84 participants in the control group	Nonsignificant change in sodium intake
Reflection apps
	App 13 [47]	Cohort		2 wk		31 participants	Nonsignificant change in the healthiness of purchases
	App 25 (EcoPanel) [48]	App vs no app		5 mo		65 participants in the intervention group and 2587 participants in the control group	Significant increase in organic purchases
	App 32 (FutureMe) [49]	App+future-self simulation vs app without		12 wk		42 participants in the intervention group and 53 participants in the control group	Nonsignificant difference in the healthiness of purchases
	App 35 (Healthy Shopping App) [16]	Cohort		4 wk		7 participants	Significantly healthier diet balance of purchases
	App 40 (Nutriflect Home) [42]	Cohort		4 wk		21 participants	Significantly healthier diet balance of purchases

^aUI: user interface.

^bParticipant counts are unknown. Only the number of scans that triggered information prompts was available.