Hearing loss can affect children's language, speech, and social skills development. Hearing problems can result from impaired auditory feedback due to various reasons such as trauma, a clinical condition, genetic alterations, and infections, among others. Early treatment is the key to successful hearing and speech rehabilitation if the hearing loss occurs before or during spoken language acquisition. In this work, we present CoachLea (pronounced as Coach-Lea), an Android application to support the clinical evaluation and therapy of the speech production and perception of children with hearing loss. The app includes numerous daily exercises to capture speech and hearing data continuously and longitudinally using a game-like user interface. Speech exercises include the ``Snail race'', ``Animal Sounds'', and ``Image identification'', whereas the hearing exercise consists of a word identification game based on minimal pairs with speech-in-noise recordings. In the long term, CoachLea aims to be a tool that supports the therapy of children with hearing loss.