Vocoost (VocabularyBoost) is an interactive mobile and web-based application for improving English speaking skills, integrating speech recognition, intonation analysis, andautomated feedback. It offers structured modules, interactive exercises,anda thematic vocabulary bank with a user-friendly, accessible interface. Its novelty lies in combining real-time speech and intonation feedback with culturally relevant content and gamification, plus a teacher dashboard for performance tracking. The creation benefits learners through engaging self-practice, supports teachers with automated assessment, and provides institutions and the public with a flexible, affordable, and context-appropriate learning tool.