Lexicana is a mobile vocabulary-learning application that makes foreign-language study structured, accessible, and motivating. Users select a target language and progress through curated word sets, beginning with the most frequently used vocabulary and unlocking advanced levels over time. Our team developed interactive flashcards with translations and definitions, dedicated Learn and Test modes, saved-word revision, progress tracking, and personalized language settings. Authentication supports email, Google, and Apple, while premium access removes learning limits. The level-based journey encourages active recall instead of passive memorization and gives learners a clear next step every day. The application has exceeded 1,000 installs and improved vocabulary-retention speed by a reported 35%.