Table 2.

Time and methods of collecting process evaluation data.

Type of data			Time of collection
Quantitative data
	App use logs	Automatically generated during the intervention process when the users log in to the app and use it for app-based intervention activities
	Offline activity logs	Collected by the teachers when holding offline activities, including competitions and group meetings, during the intervention process
	Routine monitoring data	Collected by a program coordinator every 2 weeks during the intervention process
Qualitative data
	Semistructured interviews with selected participants and key stakeholders	Within 1 month after completing the intervention