Rafaha Arjasari Special School is one of the schools that provide special education for children with special needs. Learning will not run optimally and will not be in accordance with the needs of students if previously there was no process of extracting the needs, potential, and challenges needed by students with special needs. This research resolves the problems faced by teachers when the assessment process is for children with special needs. This assessment applications built in the form of web-based applications using the Progressive Web App (PWA) technology to facilitate teachers in conducting the assessments process. This application provides features for assessing visual perceptions and perceived perceptions by utilizing the flash and vibrate features on the android smartphone. The conclusion of this research is that the application built can help the school in the assessment process to be more effective and efficient because the application is still running well, although not connected to the internet.