Long long ago there was the AudioManager app (developed by Smart Android Apps, LLC) which makes volume management so easy. However, as far as I can remember, that app disappeared in Play Store several years ago. I can see there are a lot of volume setting apps in Play Store, but I'm still eager to know how to install the one developed by Smart Android Apps, LLC because it's so easy to use. Does anyone know whether this app is open-source and with its source hosted somewhere? This company's homepage has become nothing. And they only have 2 apps in Play Store. What happened to this company?