Table A1.

Interview Guidelines. 

No.	Questions	Probes
Section 1: Attitude towards technology and health app
1	What is your opinion about using the technology?
2	Can you name the mobile app(s) that you are currently using?
3	Which source do you consult for information concerning health?	Doctors, friends, family members, newspaper, magazines, online, etc.
4	Do you use any online sites (Google, YouTube, and Facebook etc.), mobile apps (any health app) as a source of information for health-related matters?	If yes, can you name them? How frequent do you use them?
5	Would you like to use a special health app for health management and health information access?
6	What type of health information would you like to access from the health app?	information about any diseases, drugs or etc.
7	What type of health management features would you like to have in the health app?	Doctor Appointment Reminder Medication Reminder Diet Management Medical Records Storage Emergency button
Section 2: Usability/Ease of Use of a general mobile app
8	What is your opinion about the mobile app that you have used or are currently using? i. Do you like the appearance of that app? ii. What feature(s) of the app attracts you to use it? iii. Are you ok with accessing the app by logging-in or do you want to directly go to the content? iv. Is it easy to type with keypads? v. Do you like the appearance of that app? vi. What feature(s) of the app attracts you to use it? vii. Are you ok with accessing the app by logging-in or do you want to directly go to the content? viii. Is it easy to type with keypads? ix. Was the content provided by the app useful? x. Are you able to launch the app and use it by yourself without anyone’s help? How long did it take to get familiar with the app? (Hint: Whether it was few days or months?)
9	How do you normally navigate within the apps? i. Do you prefer slow response (time) for an action to take place or a quick response? ii. Do you prefer more explanatory text or simple messages? iii. Do you prefer vertical or horizontal scroll bars? Do you prefer alert/confirmation messages everytime you perform an action? Or only during some very sensitive actions like closing the app or terminating a process?
10	Do you think that only you should have permission to access or update your details? Or your partner or children can have access to monitor or update your details?
11	Could you please describe the common difficulties you encountered when using mobile apps?	What are the complex functionalities? Lack of clarity of the content. Lack of clarity of the language used. After using the app for once or for few times, have you discontinued using it? If yes, what is the reason?
12	Could you please describe the preferences in term of visual aids (e.g.,: backlight, size of text, style, bold color, color scheme and size of buttons/icons, etc.) i. Do you prefer the presentation of text in colour or black and white? ii. Do you like bright or mild color background for the apps? iii. Do you prefer the buttons to be identified with text or images? Which will be easier to remember? iv. What is the common text size preferred by you? Do you like to have the zoom in, zoom out facility to magnify and minimize the content?	Will that be useful? Or will it be a problem as it may sometimes resize the content accidentally when touched.
13	Have you ever used the speech recognition and text-to-speech features in your mobile phone or in any mobile apps?	If yes, explain about your general experience in using the speech technology. Did you face problems with voice input?
14	Would you like to use the speech recognition and text-to-speech features in the health app? i. Do you like to retrieve health information through speech? ii. Setting or updating the health-related data through speech. iii. Getting emergency help through speech. For any other tasks would you like to use speech rather than typing?	If yes, how do you want the speech technology to help you in the health management aspect?
15	Do you like to give any other suggestions to the developers for the new health management app for seniors?

Note: This is a brief version of the interview guidelines. The actual guidelines used for the interview consist of a number of images to assist the interview session.