Table 2. Theoretically driven themes and data-driven subthemes.

Themes	Subthemes
Participant engagement	Motivation for participation or altruism Feeling seen Interest in study activities
Feedback on study design	Demystifying or clarity about study Flexibility and accessibility Frequency of assessments Timing of assessments Response options Technology Relevance of the questions
Impact of self-monitoring	Emotional reactions to study activities or procedures Heightened awareness Behavior changes
Responses to data	Reflecting on the data Positive experiences Reaction to the idea of real-time data sharing
Recommendations for future interventions	Content Timing Format Audience Peer support