Table 1.

Intervention description.

Modes of delivery	Features	Behavior change techniquesa
fit.healthy.me app	My measures	Self-monitoring of behavior (ie, physical activity)
	My team	Social comparison
	Social forum	Social support Social comparison
	Private message	Social support Social comparison
	My journey	Instruction on how to perform the behavior
Fitbit Flex 2	Fitness tracker	Self-monitoring of behavior (ie, physical activity)
Texts and emails	Reminders	Prompts or cues

^aClassified according to the behavior change technique taxonomy developed by Michie et al [26].