This simple application for know about your headphone's left/right position of speakers. Some headphone doesn't describe about L/R position. This app helpful for know about.

Especially when watching movies, it is important that your phone is properly worn.

Add a widget

On a Home screen, touch and hold an empty space.
Tap Stereo Test Pro Widgets .
Touch and hold a widget. You'll see images of your Home screens.
Slide the widget to where you want it. Lift your finger.