Violin Tuner by TrueStudio is an Android application designed to help you tune your violin with precision. The app uses your phone's microphone to listen and analyze the sound in real-time, then recognizes which string you are playing and indicates if your string is too low or too high. This app is perfect for beginners who are still learning how to tune their instruments.

In addition to the automatic mode, you can also use the chromatic mode to tune your violin manually. You can press the buttons of a string on the app to switch to manual mode, and then you can only tune the string you pressed. If you get this string in tune, then press the next button and tune the next string. Moreover, the app also includes a metronome feature to help you keep time while you're playing.

Overall, Violin Tuner is a great app for violin players of all levels. It is easy to use, accurate, and completely free.