TABLE 1.

Median General Quality Scores of Apple and Android Apps: Free and Paid Versions

Quality Scores (Total Points)	Apple			Android
	Median Score (%, IQR)		P Value	Median Score (%, IQR)		P Value
	Free (n = 16)	Paid (n = 14)		Free (n = 13)	Free (n = 16)
Reliability (12 points)	3/12 (25.0, 37.5)	3/12 (25.0, 25.0)	0.782	3/12 (25.0, 29.2)	3/12 (25.0, 16.7)	0.516
Usability (22 points)	15/22 (70.5, 12.6)	17.5/22 (79.6, 15.9)	0.167	14/22 (63.6, 18.2)	18/22 (81.9, 21.6)	0.012b
Privacy (4 points)	2/4 (50.0, 75.0)	0.5/4 (12.5, 50.0)	0.072	2/4 (50.0, 0.0)	1/4 (25.0, 50.0)	0.012b
General qualitya (38 points)	20/38 (52.6, 16.5)	21/38 (55.3, 17.1)	0.786	21/38 (55.3, 18.5)	23/38 (60.5, 14.5)	0.243

^a General quality scores are the sum of the reliability, usability, and privacy scores.

^b Statistical significance of P < 0.05 for usability and privacy scores between Android free and paid apps.

IQR = interquartile range.