Table 5. Other usability-related comments made by users during the study.

Description	Context	Users, n
Show meaning of abbreviations	General	4
Too much scrolling in the app	General	3
Side menu: too much information	General	3
Unclear why the app needs to be installed	App installation	2
Confusing that the Mutterpass data is editable	Maternity logbook	2
Side menu: avoid scrolling up each time to access side menu	General	2
Heart frequency plots without labels	Data visualization	1
Show the gravidogram version in a user-friendly way	Maternity logbook	1
Visualization options: not easy to find	Data visualization	1
Side menu: use collapsible structure	General	1
Side menu: make it sticky to avoid scrolling up to open it	General	1
Side menu: colors make it unclear which parts are clickable	General	1
Show time estimated to finish a questionnaire	General	1
Show previous ultrasound examinations first by default	Ultrasound	1
Show reference values in plot	Data visualization	1
Heart frequency plots without legends	Data visualization	1
Reduce the amount of information on each screen	General	1
Reduce number of needed clicks in questionnaires	General	1
Horizontal scrolling tabs not discoverable	General	1
Hide technical information from the Mutterpass by default	Maternity logbook	1
Color code open tasks if done or in progress	Open tasks	1
Use smaller icons in main screen to reduce scrolling	General	1
Due date estimation: too much information	Maternity logbook	1
Journal option not discoverable	Journal	1
Visualization options: text would look better as a table	Data visualization	1