WRD – Learn Words positions itself as a modern vocabulary-building tool that leverages artificial intelligence and language usage statistics to optimize learning efficiency. Developed by Happymagenta UAB, the Android application employs algorithms derived from language experts and computer models to create personalized learning paths for users studying Spanish, English, German, Russian, Lithuanian, and other languages. The application's core functionality revolves around bite-sized exercises that target all four language competencies. The system analyzes user performance to adjust difficulty levels and content selection dynamically. Each session incorporates spaced repetition algorithms, contextual learning through example sentences, and progressive difficulty scaling. The AI component identifies patterns in user mistakes to provide targeted practice, while the statistical approach ensures learners focus on the most frequently used vocabulary in real-world contexts. User experience demonstrates thoughtful design with intuitive navigation and clean visual presentation. The interface employs a card-based system for vocabulary presentation, accompanied by audio pronunciations, example usage, and writing practice. Real-world usage patterns show most users engage with the app during short daily sessions of 5-15 minutes, making it suitable for consistent, incremental learning. The modular design allows users to focus on specific skill areas or follow comprehensive learning paths. User feedback trends indicate strong satisfaction with the app's design and functionality. The 4.6-star rating reflects consistent praise for the user-friendly interface and modular approach. As user Adem Onder noted on February 5, 2025: 'I really loved it because it is so modular, well designed and so user friendly application.' This sentiment appears frequently in reviews, with users particularly appreciating the structured yet flexible learning progression. The application's primary strength lies in its data-driven approach to vocabulary selection and retention optimization. However, limitations include the current absence of conversational practice with native speakers and relatively fewer language options compared to some competitors. WRD proves most effective for learners who already possess basic language knowledge and seek to expand their vocabulary efficiently through scientifically-backed methods rather than those requiring fundamental grammar instruction or conversational practice.