Table 2.

The summary of features of included apps.

Feature		Apps (N=18), n (%)
Platform
	Android	8 (44)
	iPhone	10 (56)
Cost (Aus $)
	Free	12 (67)
	<6	5 (28)
	>40	1 (6)
Focus
	Methamphetamines (including ice)	4 (22)
	Methamphetamines (including ice) and other drugs	14 (78)
Theoretical background and strategies
	Information or education	17 (94)
	Advice, tips, strategies, or skills training	6 (33)
	Assessment of drug use	2 (11)
	Feedback on drug use	2 (11)
	Monitoring or tracking	2 (11)
	Goal setting	1 (6)
Affiliations
	Commercial	10 (56)
	University or government	3 (17)
	Nongovernment organization	1 (6)
	Unknown	4 (22)
Target age groups
	General population	17 (94)
	>12 y	1 (6)
Technical aspects
	None	15 (83)
	Password protection or requires log-in	1 (6)
	Automatic sensing (eg, global positioning system)	1 (6)
	Web access required	1 (6)