Bluetooth Devices & Volume Manager is a free Android app developed by Breed Softech. This app is designed to manage your Bluetooth devices more effectively with extra functionalities that are not available in the default Bluetooth Manager. With this app, you can easily turn your Bluetooth on and off, adjust the volume of music, calls, ringtones, and notifications. The app also checks for available devices in the background and allows you to pair and unpair devices.

One of the unique features of this app is that you can set your regular devices as favorite devices, which means that you don't have to scan every time. Moreover, the app allows you to rename the paired and unpaired devices to remember them in a better way. However, please note that this app cannot "boost" your volume or change the volume if you cannot change it through your device's volume buttons manually.

Overall, Bluetooth Devices & Volume Manager is an efficient app that can help you manage your Bluetooth devices with ease. Download it for free and take advantage of its functionalities.