Table 2.

Nutritional functionalities of the nutrition-related apps (n=44).

Functionalities			n (%)
Searching food and nutrition information			40 (91)
	Items available in database
		Prepackaged food	32 (73)
		Single food	40 (91)
		Recipe	32 (73)
	Nutritional information available in database
		Energy	38 (86)
		Energy-yielding nutrients	33 (75)
		Vitamins and minerals	22 (50)
		Fiber	27 (61)
	Other information
		Graphical healthy rating	18 (41)
		Glycemic index	6 (14)
Recording food intake			34 (77)
	Quantified by weight (g)		31 (71)
	Quantified by portion		27 (61)
	Using graph to estimate amounts		9 (21)
Providing recommended recipes			21 (48)
	With energy requirement		19 (43)
	With specific food		21 (48)
	With amount of food		18 (41)
	With cooking guidance		12 (27)
Dietary analysis and suggestions			34 (77)
	With energy analysis		33 (75)
		Total energy	32 (73)
		Energy balance (balance intake and expenditure)	19 (43)
		Energy ratio of three meals	23 (52)
		Energy source (ratio of three macronutrients)	15 (34)
	With dietary structure analysis		10 (23)
		Arrangement of food groups (eg, grains, vegetables, dairy products)	6 (14)
		Estimates of micronutrients intake	7 (16)
Nutritional education			35 (80)
	Independent education module		26 (59)
	Intake of oil, salt, and sugar		6 (14)
	Suitable dietary structure		4 (9)