Table 1.

Main codes and subcodes from functionality’s evaluation.

Functionality type and subtype		Definitions
Screening
	Monitoring symptoms	The screening function is provided for monitoring depression symptoms during intervention
	Self-diagnosis	The screening function is provided for self-assessment of depression
	Basis for personalization	The screening function is provided as a basis for personalized intervention
Tracking
	Tracking thought patterns	The tracking function supports the tracking of thought patterns
	Tracking mood patterns	The tracking function supports the tracking of users’ mood patterns
	Tracking behavior as the intervention progresses	The tracking function is provided for monitoring progress in following the intervention, including users’ adherence to the intervention
	Tracking depression symptoms	The tracking function is provided for monitoring symptoms
Intervention
	Thought diaries	The intervention is provided to help users identify and challenge their negative thinking patterns
	Psychoeducation	The intervention is provided as psychoeducational content
	Mindfulness	The intervention is provided to help users improve mindfulness
	Behavioral techniques	The intervention is provided to motivate and guide users to perform positive behaviors
	Mood expression	The intervention is provided for users to express their emotions
	Other	The intervention is provided as emotional regulation strategies other than mindfulness