Table 2.

Key characteristics and content of the reviewed apps (N=12).

Characteristic		Value
Market availability, n (%)
	Apple Store	6 (50)
	Google Play Store	5 (42)
	Both	1 (8)
Cost, n (%)
	Free to download	12 (100)
	In-app purchases	5 (42)
Affiliated with a professional health, medical, clinical, or government body, n (%)
	Yes	2 (17)
	No	10 (83)
The user can change the language, n (%)
	Yes	0 (0)
	No	12 (100)
The user can change to night/dark mode, n (%)
	Yes	3 (25)
	No	9 (75)
Sleep guidance mentioned, n (%)
	Lie your baby on their back	12 (100)
	Keep their cot clear	10 (83)
	Use a firm, flat, and waterproof mattress	11 (92)
	Recommend against bed-sharing (shared sleep between an adult and a baby on an adult bed for the majority of the night) if the baby has a low birth weight, or either parent has had 2 or more units of alcohol, smokes, is taking medication that causes drowsiness, or has used recreational drugs	11 (92)
	Avoid your baby getting too hot	12 (100)
	Sleep your baby in the same room as you for at least the first 6 months	10 (83)
	Do not sleep on a sofa or chair with the baby	8 (67)
	If bed-sharing: do not have pillows or duvets near the baby	4 (33)
	If bed-sharing: do not have other children or pets in the bed	3 (25)
Readability
	Reading ease score, mean (SD)	76.6 (SD 7.98)
	Reading age (US grade level)	6.9