The simple user interface with noise filtering can help you tuning the 4 strings with simple setting while activating the APP. First step is choose the frequency at top of screen, then choose the tuning at the middle of the screen. When you pull the Violin string, the pitch will be shown on the panel for the individual string by indicating signal high or low. [Function Description...
||Requires iOS 9.2 or later. Compatible with iPhone, iPad, and iPod touch.