GuitarTuna is a popular mobile application designed to help musicians tune their guitars and other string instruments. It uses advanced audio recognition technology to detect the pitch of each string, providing real-time feedback to ensure accurate tuning. The app is user-friendly and suitable for both beginners and experienced players. In addition to tuning, GuitarTuna offers various features such as chord libraries, metronomes, and games to improve playing skills. It supports a wide range of instruments, including ukuleles and bass guitars, making it a versatile tool for musicians of all levels.