Table 1.

Survey measurement items (adapted from [19]).

Items	Measurements
Sociodemographic	What is your Gender?
	What is your Age?
Types of mHealth used and desired features	Which Smartphone Operating System (OS) do you use?
	What kind of health and wellness apps have you downloaded over the past 12 months?
	How many health and fitness apps have you used over the last 12 months?
	What are the most important features for you in the health and fitness app?
Adoption	What is the name of the health and fitness app that you use?
	How do you usually know about the health and fitness apps you install on your phone?
Adherence	What is the main reason you use health or fitness apps?
	How often do you use a health and fitness app in a month?
	What is the main source of encouragement that you receive to use health and fitness apps?
	How many hours do you spend each day on your smartphone?
Discontinued use	If you could change anything about the fitness apps you are using, what would it be?
	Which of these better explains why you stop using the health and fitness apps?
Motivational affordances	Using a health and fitness apps motivates me to exercise more.
	Using a health and fitness apps motivates me to eat healthier.
	Using a health and fitness apps helps me to keep track of my goals.