Table 4.

Summary of the provider suggestions for mobile health app features.

Function of feature, feature		Definition	Illustrative quotes
Ease of use
	Simplicity	Having an intuitive and efficient interface	…Something super intuitive that could be used in a way that is almost dummy-proof. So even if you’re not super tech savvy… it would just be so easy. And quick. [Provider 6]
	Reminders	Notifications reminding clients to complete their tracking	…A reminder is always helpful… I think for some people, an alarm or a popup, a sound, or whatever would be easy for people to see and do. They can just click it and go right into it…being able to set up when and how it shows up, according to the patients' preferences. [Provider 7]
	Remembering data	Previous entries remembered to ease data entry	…It would remember what I'd already entered and add it to the menu, so if I had the same breakfast three days, I could just hit breakfast and it would just put in all three. [Provider 10]
	Data-based suggestions and advice	Tips or information about the tracked behavior	…Kind-of a help button. Any kind of monitoring form can be confusing… when we ask about your mood scales, there's kind of a definition with each question… it's really clear what information is needed. [Provider 12]
Improve clinical utility
	Customization	Ability to personalize activities and data input	…My dream application would be a sophisticated application that allows you to create scales and create the flexibility to make whatever scale I want. So, it’d have a bunch of different ways to track something. [Provider 11]
	Provider notifications	Alerts telling the provider when the client enters data	…[Something that] gets communicated to me via link or email and it’s just very clear and understandable and it doesn't take too much time for me to understand it. [Provider 1]
	Output for providers	Organized summaries of client data such as a table or graph	…If there were a system… that automatically graphed things for you… So I could log in as their provider and see a graph of progress over time. [Provider 1]
	Parent information	Allow parents to enter information	…Maybe it would be nice if there was a child feature and a parent feature, or if there was an ability to link between phones so the parent and the child could input data. [Provider 8]
Improve appeal of tracking
	Visually appealing	Pleasing interface rather than plain text	…Something that reminds the client to take some time and sit down… I wouldn't want the app to be like opening up the notes section of your iPhone. [Provider 5]
	Reinforcement	A feature that rewards activity completion	…[There should be] immediate reinforcement on completing it. Technology has built up youth's dependence on instant gratification, so using that in a way that would help them continue to be using it. [Provider 8]
	Options	Multiple-choice options for describing mood, rather than an open-ended format	…Being able to scroll down and select [from a list of] cognitive distortions. [Provider 2]
Provide additional information
	Output to clients	Data summaries that are accessible to the client	…If the app can output the data back to the client in a way that helps them see like, ‘oh on average you’re getting so much sleep!’… Because that's what monitoring is about. To help us better understand these patterns, and make use of these patterns, to make use of it in therapy and treatment and address it. [Provider 7]
	Crisis resources	Provide crisis resources	…What would be great is having a page or a tab, or something where there's a list of local crisis resources, so text line, lifeline, rape line, so somehow pulling from crisis stuff. [Provider 9]
	Social support	Provide social support or connect to social media	…It lets me post to social media, so you get that kind of support too. [Provider 7]