LINE: Calls & Messages positions itself as a comprehensive communication platform bridging global users through free messaging, voice calls, and video conferencing. Developed by LY Corporation, the app has established significant market presence particularly across Asian markets, offering a robust alternative to mainstream messaging services with its distinctive sticker ecosystem and multi-platform accessibility across mobile, desktop, and Wear OS devices. The application's core functionality centers around real-time communication features including high-definition voice and video calls that perform reliably across varying network conditions. Messaging capabilities support text, images, videos, and location sharing, while the platform's extensive sticker marketplace offers thousands of licensed and original expressive elements. Additional features include timeline posting capabilities, group chats supporting up to 500 participants, and integrated payment services in supported regions, creating a multifaceted communication ecosystem rather than a simple messaging tool. User experience demonstrates generally intuitive navigation with a tab-based interface separating chats, calls, contacts, and timeline features. The design employs bright colors and large interactive elements that facilitate quick access to primary functions. Real-world usage patterns indicate particularly strong adoption for international communication, especially between users in Asian countries and their overseas contacts, with many users employing the platform as their primary communication channel for both personal and light business correspondence. User feedback reflects mixed experiences with technical support and account management. Multiple reviews from Rabbi Al-Mamun (July 14, 2025) detail account recovery difficulties following device resets, noting initial support challenges that required screen recording evidence for verification. Conversely, Stephen Modize's reviews (August 13, 2025) praise the application's security measures and user-friendly interface, describing it as an efficient tool for maintaining family connections across distances. The application demonstrates strengths in feature diversity and cross-platform consistency but faces challenges in customer support responsiveness and market penetration outside Asian territories. While the sticker economy and free international calling represent significant value propositions, some users report occasional notification delays and higher battery consumption during extended video calls. LINE remains most valuable for users maintaining international connections, particularly those with existing social networks already embedded within the platform's ecosystem.