Table 3.

Preferences in sleep app features (abridged; N=167).

Features			n (%)	High insomnia (Insomnia Severity Index 17+)	Low insomnia	P value
Importance of...
	Sleep diary and tracking					.32
		Little to no importance	19 (11.4)	9 (5)	10 (6)
		Important	148 (88.6)	88 (53)	60 (36)
	Tracking of diet, exercise, and other lifestyle factors					.11
		Little to no importance	60 (35.9)	30 (18)	30 (18)
		Important	107 (64.1)	67 (40)	40 (24)
	Sharing or comparing sleep data with friends or other users					.45
		Little to no importance	138 (82.6)	82 (19)	56 (34)
		Important	29 (17.4)	15 (9)	17 (8)
	Sharing sleep data with your doctor					<.001
		Little to no importance	51 (30.5)	20 (12)	31 (19)
		Important	116 (69.5)	77 (46)	39 (23)
	Linking to a wearable device (eg, Fitbit, Jawbone, and ActiWatch)					.58
		Little to no importance	84 (50.3)	47 (28)	37 (22)
		Important	83 (49.7)	50 (30)	33(20)
	Being usable offline (without an internet connection)					.14
		Little to no importance	54 (32.3)	27 (16)	27 (16)
		Important	113 (67.7)	70 (42)	43 (36)
	Not requiring the phone to be by the bed					.49
		Little to no importance	110 (65.9)	66 (40)	44 (26)
		Important	57 (34.1)	31 (19)	26 (16)