Table 8 List of questions for users’ interview related to using the application in terms of user interface and system performance

Questions part 3 (Usability Evaluation)

Q3-1 Pressing buttons on the screen is easy and is supported by the slide style in the disability mode

Q3-2 Screen proportions are easy to access

Q3-3 The number of the menu items is suitable and easy to use

Q3-4 Each menu is easy to access and reasonably named

Q3-5 The proportion of the display areas is appropriate

Q3-6 The voiceover on the screen provides an easy way to communicate

Q3-7 The speed of the sound display is appropriate and easy to understand

Questions part 4 (System Performance)

Q4-1 The application is intuitive and understandable for users on the trial

Q4-2 The application provides useful information about medication for primary self-treatment

Q4-3 The barcode scanner function makes it easy to find medicines

Q4-4 The time remaining function is useful for treatment

Q4-5 The search function using keywords or voice recognition makes searching easier

Q4-6 Information about historical drug consumption makes record-keeping easier

Q4-7 Information on the application enables users to self-manage their medication

Q4-8 The individual drug database function is useful for recording medication information

Q4-9 The application can be operated quickly on a smartphone and the system is stable