Table 1.

Primary and secondary objectives, measures, and indicators.

Objectives		Variables
Primary objectives (measures and indicators)
	To explore the feasibility of using SMART Track as part of SMART Recovery groups	Proportion of eligible participants who consent to the study, create an account, and use SMART Track Proportion of missing data for each of the routine outcome monitoring items and instruments at each week of administration across the 8-week period of SMART Track use Engagement and use patterns indexed through data analytics captured daily across the data collection period Costs associated with developing SMART Track and maintaining the app until the completion of data collection
	To explore the acceptability of using SMART Track as part of SMART Recovery groups	Detailed qualitative feedback from SMART Recovery group members and facilitators to explore their experience of, and satisfaction with, SMART Track (8-week follow-up) Quality ratings as assessed by participant ratings of the end-user version [87] of the Mobile App Rating Scale [88] at 8-week follow-up Digital therapeutic alliance ratings as assessed by participant ratings of the Digital Working Alliance Inventory at 8-week follow-up
Secondary objective (secondary end points)
	To provide preliminary evidence for participant-reported outcomes	Participant-reported progress across the 8-week period of app use in (1) substance dependence (Severity of Dependence Scale [89]), (2) addiction recovery (Substance Use Recovery Evaluator [74]), and (3) mental health (Kessler Psychological Distress Scale [75,90])