This is a professional Ruan tuner. It is designed to tune a Chinese Ruan, including Xiao Ruan, Zhong Ruan, Diyin Ruan and Liu Qin, Yue Qin. The function and usage are exactly the same as the professional digital tuner, the performance is much better. It works quite well, even in a noisy environment. It is easy to use, pluck a string of Ruan, as the sound goes into the mobile phone, App will accurately identify the string and the deviation of frequency in cents. App only responds to musical tones in certain frequency range, while filtering out other interference sounds. We have been focused on musical instruments turning for more than 10 years. We designed and manufactured a large number of popular professional digital tuners, as the upgrading, we recommend this App.
