NIHR i4i funded project (NIHR200889) is appealing for volunteers to download our app Language Explorer and retell a story. The story recording will be used to train software to help speech and language therapists evaluate the language of children who might have developmental language disorder (DLD). We need 600 children around England and Wales to share their story to allow us to gather enough data to make the software that will be evaluated in 2020 in real NHS clinics by speech and language therapists, parents and children. The game-based app will present an animated story to be retold by children aged 4 to 8. The child’s spoken story will be analysed to understand how their performance stacks up to age-matched peers from around the country. It involves a treasure hunt adventure which has universal appeal and excitement!