The 'MySuara' app is a personalised augmentative and alternative communication (AAC) mobile application designed for Malaysian special education classrooms, offering multilingual support and a unique dual-screen modelling feature to enhance teacher-student communication. Besides, it allows the customisation of symbol sets to meet individual student needs, providing a personalised solution for teachers and caregivers. This study aims to assess the usability of the 'MySuara' mobile app using a developed questionnaire, as usability is quantifiable and crucial for user satisfaction. Conducting such evaluations can unveil flaws in the system and reveal user demands, which is vital for successful app development. Usability testing is essential during development to ensure high user satisfaction and successful app usage. However, limited usability models exist for assessing mobile application features. Therefore, 'MySuara' was evaluated using a questionnaire developed based on the Mobile Lear.....

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