The Closing 1 - Hearing Skills application is an APP that contains 15 tracks with adult voice, with white noise, divided into 3 levels of difficulty (easy, medium, difficult); plus 24 tracks with a child's voice, with school noise, equally divided into 3 levels of difficulty (easy, medium, hard). The exercises were conceived and created by speech therapists Filipa Branco and Sara Araújo, under the guidance of Professor Cristiane Lima Nunes, with the aim of developing Central Auditory Processing, more specifically the auditory closing competence.