The integration of classical and modern teaching strategies enables the creation of an effective educational environment that meets the needs of various types of learners. The aim of this study is to explore the potential for integrating mobile applications into vocal education by analyzing their accessibility and effectiveness as learning tools, as well as identifying their advantages and limitations. Using five popular educational apps--Singscope, PitchPerfect, Vocaberry, Yousician, and Smule--as case studies, the research examined which interface features and organizational aspects of these apps most significantly determine their accessibility and effectiveness. The findings indicated that Vocaberry and Yousician exhibited the highest effectiveness, receiving the highest overall ratings (8.57 and 8.29, respectively) and demonstrating the greatest improvement in users' vocal skills (+ 2.2 and + 1.8 points, respectively). A strong correlation was found between perceived ease of use, the utility of the apps, and the degree of skill improvement. Key success factors identified include interface convenience, the presence of gamification elements, and the diversity of musical content. Factors negatively impacting the educational effectiveness of the apps were insufficient interactivity (26% of users) and high assessment complexity (21%). The results underscore the importance of balancing functionality with ease of use in creating effective vocal training tools and outline directions for further enhancement of mobile apps in this domain. The study's outcomes will be valuable for the development and implementation of mobile applications in the educational process, highlighting key areas for improvement.