Table 1.

Description of the modules of iTandem and their intended purposes.

Module	Frequency of notifications	Aim	Contents	Basis of measure/intervention
Sleep	Twice daily	Map sleep patterns and quality, link to the level of function	Sleep diary	Consensus sleep diary
Medication	Once or twice daily	Support service users in keeping track of and remembering to take medication at the right time	Registration of medications taken and potential side effects List of medications	Partly developed by the project group and partly adapted from the UKU Side Effect Scale Developed by the project group
Recovery	Daily/weekly Monthly	Do positive psychology exercises Map and focus on personal recovery and positive aspects of mental health	Good things Personal strengths Psychological well-being Emotional well-being Cognitive well-being	Exercises adapted from “Positive psychotherapy for psychosis” Questionnaire about the Process of Recovery Warrick-Edinburgh Mental Well-Being Scale Lehman Life Satisfaction Scale
Mood	Daily	Map feelings and mood variability, link to sleep, medication, experiences, and other symptoms	Mood diary Emotions	Adapted from the paper version of the mood diary from the Systematic Treatment Enhancement Program for Bipolar Disorder study Developed by the project group
Psychosis	Weekly Monthly	Follow symptom development and relation to difficulties in reaching goals, link to other variables, guide treatment	Symptoms of psychosis Negative symptoms	Developed by the project group Self-evaluation of negative symptoms (Self-Evaluation of Negative Symptoms Scale)
Activity	Daily	Increase/regulate activity level, set goals, plan activities, motivate to complete, bring personal experiences into treatment	Registration of goals Registration of activity	Developed by the project group
Substance use	Weekly	Gain a better understanding of how substance use impacts symptoms and daily life, guide coping strategies	Registration of substance use and coping strategies	Developed by the project group
Feedback on treatment	Before and after consultations	Facilitate feedback to the clinician to strengthen patient involvement and quality of treatment, provide an overview of the treatment course	Before consultation After consultation	Developed by the project group