| 1. Do you think app will help improve your voice? |
| 2. Is the degree of difficulty of the provided voice therapy program satisfactory? |
| 3. Do you think app provide a description or a demo video? |
| 4. Do you think app systematic training contents and training contents were divided? |
| 5. Can the app re-practice by selecting specific steps? |
| 6. Do you think app’s icon, font size, color appropriate? |
| 7. Was the output audio and video sound in the application appropriate? |
| 8. Do you think home button and the navigation between the screens well connected when using the app? |
| 9. Are you convenient to use the app? |
| 10. Are you satisfied with the app? |
| 11. Do you think you need a home voice treatment program like 'Home Voice Trainer'? |
| 12. Are you willing to use the upgraded Home Voice Trainer? |