Table 4 Evaluation of the application’s usability by experts based on PSSUQ questionnaire

System usefulness

1

I am generally satisfied that I can work with this app easily.

2

Using this app, the necessary scenarios in kidney stones can be completed more effectively.

3

I think it is very easy to learn how to work with this app.

4

I feel comfortable working with this app.

5

Using this app can speed up the completion of tasks, disease management and kidney stone-related affairs.

6

Using this app can affect the overall performance of kidney stone patients.

Overall

7

I believe that by using this application, people can be more effective in self-care of urinary tract stones.

Information quality

8

This app provides errors and messages to the user in such a way that I know exactly how to fix the problem.

9

Whenever I have a problem while working with the app, I can easily and quickly return to the app.

10

The information provided to the user in this app (such as guides, suggestions and errors) has made it much clearer to work with this app.

11

In this app, I can easily obtain the information I want and get transferred to the desired section.

12

The information provided by this app is completely understandable.

13

App information and guides are effective in completing the various sections and scenarios of the app.

Interface quality

14

How to place and arrange information on different pages of the app is very clear and convenient.

15

Design of the application’s display is appropriate and beautiful and I can interact well with the app.

16

I like the look of the app and its interface.

17

The app had the capabilities and functions that I expected.

Overall

18

I am generally satisfied with this app.

Total