. 2019 Feb 20;7(2):e9838. doi: 10.2196/mhealth.9838

Table 1.

Correlation coefficients (r) for estimates of energy and nutrient intake between popular diet apps and Dietplan6 using 24-hour weighed food records (n=20)^a.

Nutrients	Samsung Health	MyFitnessPal	FatSecret	Noom Coach	Lose It!
Energy (kcal)	.79	.85	.86	.91	.87
Carbohydrates (g)	.90^b	.85	.90	N/A^c	.66
Protein (g)	.91	.82	.91^b	N/A	.43^d
Fat (g)	.84	.91^b	.83	N/A	.79
Saturated fat (g)	.83^b	.73b	N/A	N/A	.49^b,d
Fiber (g)	.70^b	.70^b	.66^b	N/A	.23^b,d
Sodium (mg)	.44^d	.44^d	.47^b,d	N/A	.51^d
Calcium (mg)	.37^b,d	.47^b,d	N/A	N/A	N/A
Iron (mg)	–.12^d	.13^b,d	N/A	N/A	N/A
Vitamin A (μg)	.20^b,d	.21^b,d	N/A	N/A	N/A
Vitamin C (mg)	.49^b,d	.54^b,d	N/A	N/A	N/A

^aCorrelation assessed using Pearson rank correlation, significant at P<.01 (Bonferroni correction applied) (unless otherwise specified).

^bCorrelation assessed using Spearman correlation (r_s), significant at P<.01 (unless otherwise specified).

^cN/A: not applicable.

^dP>.01.