Replika is an AI companion designed to engage users in empathetic conversation, learning from their text interaction styles to simulate personalized conversations. It can play various roles like a friend, partner, or mentor, adapting to users' needs. The application offers chat, video call, and Augmented Reality experiences for shared real-time interactions. Users can discuss diverse topics, engage in activities, and develop better habits with the AI coach. Replika stores user information, allows defining interests, and offers insights into its 'inner world' through a digital diary. Inspired by Carl Rogers' therapeutic approach, Replika provides positive feedback and emotional support, available on iOS, Android, and Oculus platforms.