A notable AI language learning mobile app was founded in early 2024 and is available on iOS and Android platforms. It offers users a natural language learning experience through interactions with Capy, an AI capybara that tailors conversations based on user profiles. Supporting over 40 languages and six user interface languages, the app includes features such as family accounts, voice messaging, and a comprehensive onboarding process. The app has been recognized by multiple startup competitions and ranked among the top global EdTech companies. The app was meticulously developed by a duo of engineers who built the system from the ground up, differentiating it from competitors that use standard AI platforms. It uniquely personalizes user experiences through a custom RAG memory engine that stores user data as vectors. Key features include voice capabilities, family-specific controls, and secure backend architecture. A team of over 20 contributors, including interns and designers, ensured a non-template design, significantly highlighting creative and technical efforts. Revenue is driven by subscriptions, with individual and family plans. A pricing model validation achieved conversion with a test price of $1/month and indicated significant monthly recurring revenue at standard pricing. The app’s serverless architecture minimizes maintenance, and the automated systems allow for an efficient operational model requiring minimal time from the owner. The founders have decided to sell the app due to evolving personal commitments but are committed to supporting a smooth transition to a new owner. With proven product-market fit, low customer acquisition costs, and growth opportunities, the app is positioned for continued success under new ownership.