Table 3.

Problems experienced running the Socialise app.

Response	n (%)a	Potential solutions
No problem	38 (68)	—
App notification telling users they restarted phones	7 (13)	Only send notification if no data are uploaded to database
Noticeable battery loss	2 (4)	Reduce scanning rate
Difficulty sending emails after app installation	2 (4)	—
App not presenting questionnaires	1 (2)	Check scheduling function of Socialise app
App not scanning	1 (2)	Check settings
Annoying to keep app open; accidentally swipe closed	1 (2)	Send notification if no data are uploaded to database
Unsure if app running properly	1 (2)	Improve instructions
Unsure about what they should be doing with app	1 (2)	Improve instructions
App not working	1 (2)	Check phone model and operating system
Unspecified problem	1 (2)	—

^aParticipants were asked to answer questions about problems running the app four times during the study. Twenty-three unique participants answered these questions, yielding 56 responses.