Table 1.

Selected quotes from interviews regrouped into thematic categories.

Category	Subcategory	Example
Perception of the app
	Design	I think the app is professionally designed. [Participant 11]
	Content	Lots of information and diverse topics. [Participant 1]
	Handling	The handling is inconvenient [...]. [Participant 12]
Obstacles to frequency of use
	Technical issues	My password wasn’t valid, and I didn’t try again. [Participant 6]
	No interest	I didn’t want to download the app. [Participant 7]
	Purpose uncertain	The app was briefly explained, but I didn’t entirely get it. [Participant 3]
	Missing user base	[I did not use the app more often]...because my friends didn’t use it. [Participant 13]
	Other networks used	Since there are Facebook and other platforms, those are used more frequently. [Participant 10]
Areas of improvement
	Easier handling	Faster access. [Participant 12]
	Extended promotion	Promotion should be extended, more precise and more attractive information. [Participant 2]