Table 3.

Criteria for selecting and reasons for not selecting nutrition and diet apps (N=2382).

Criteria and barriers		Value, n (%)
Criteria for selecting a nutrition and diet app
	Easy to use/convenient	1570 (65.9)
	Costless/free of charge	1413 (59.3)
	Automatic calorie estimation is supported	1231 (51.7)
	Automatic nutrient estimation is supported	1117 (46.9)
	Automatic food recording is supported	1115 (46.8)
	Validated and certified	1036 (43.5)
	Self-explanatory (no need for training)	953 (40)
	History records are supported	755 (31.7)
	Recipe and menu import functions are supported	729 (30.6)
	Provides an option for adding nutritionally related events (eg, reflux)	443 (18.6)
	A link for data transmission (eg, other apps) is supported	217 (9.1)
	No opinion	195 (8.2)
	Other	95 (4)
Barriers to selecting a nutrition and diet app
	Major foods are missing	977 (41.0)
	Incorrect calorie and nutrient estimation	798 (33.5)
	Local foods are not supported	655 (27.5)
	Unconvincing portion size estimation	648 (27.2)
	Not personalized	503 (25.1)
	Not validated and not certified	567 (23.8)
	No opinion	522 (21.9)
	Only manual entry of food type is allowed	464 (19.5)
	Incorrect automatic food item recognition	448 (18.8)
	Recipes are not considered for nutrient estimations	376 (15.8)
	Only manual entry of portion size is allowed	345 (14.5)
	User is required to be tech savvy	310 (13.0)
	History records are not supported	295 (12.4)
	Sharing of history records is not supported	88 (3.7)
	Other	83 (3.5)