My son has speech delay and he finds it difficult to imitate speech delivered by his care takers and therapists. But he is good at naming objects abd pictures. Through avaz app he finds it easier to learn communication through the pictures and sounds  which can be customized( big benefit) for each child. It was useful from the first day. For children with speech delay it definitely augments speech development and for those who cannot speak at all ( children and adults post stroke ) can use it as an easy method for interacting with others. I am grateful that such an app has been developed to help such children and adults with speech difficulties - Dr. Pris P, Parent