Table 2.

Feedback for overall app design.

Themes	Design heuristics	Positive feedback	Suggestions
Visibility	1. Aesthetic and minimalist design 2. Match between system and the real world	Some participants liked the current color theme.	1. Font: - 1.1. Use a bigger font size. - 1.2. Have a function to change the font size. - 1.3. Be able to view horizontally - 1.4. Develop an iPad version of the app. - 1.5. Connect the phone to a television. 2. Color: - 2.1. Use lighter colors. - 2.2. Use more green. - 2.3. Use comforting colors. - 2.4. Increase contrast. 3. Add the university’s logo. 4. Make the appearance more interesting, such as adding pictures.
Navigation and error prevention	1. Flexibility and efficiency of use 2. Match between system and the real world 3. Error prevention 4. Help users recognize, diagnose, and recover from errors.	1. It was easy to navigate the app. - 1.1. Easy to use the home button, go forward and backward, and scroll up and down 2. Navigation was familiar from other apps.	1. Have a table of contents to go directly to a specific page. 2. Have a clear log-out icon. 3. Use pop-ups for additional information in the readings. 4. Use the scrolling bar instead of a drop-down list to select date and time for the meeting. 5. For the “reselect” icon in answers for case studies: - 5.1. Darken its color. - 5.2. Make it more visible. 6. For clickable text in graphics: - 6.1. Have a clear “close page” icon. - 6.2. Use arrows or other ways to highlight what to click.
Password and privacy	Recognition rather than recall	The password requirement was valued by some participants.	1. Password should be automatically saved. 2. Participants should be able to change their password. 3. Regarding the password format, some liked to use their phone number as the password (current version) and some preferred to use a fingerprint. 4. Some said a password was not needed. - 4.1. A password would be needed if the app is not free.
Language and terms	Match between systems and real world	Some participants said the terms and expressions used were understandable.	1. Pay attention to different expressions in different regions of China. 2. Use language and terms that are less professional.
Help and documentation	Help and documentation	The current help document (hard copy) was easy to use.	1. Some preferred a hard copy; some preferred the in-app text version; some wanted an in-person orientation; some preferred an instruction video; some wanted to have a PDF document on the computer. 2. Some participants wanted a more comprehensive help document, while some said a help document was not needed.