Assistive Volume Button is a free Android application developed by mCreations that allows users to control the volume of their phone's Ring, Music, and Call functions with ease. The app displays buttons on the side of the screen, which can be moved to any location on the edge. Users can customize the appearance of the buttons and sliders, such as their size, color, transparency, and style, including iOS and MIUI.

One of the app's most useful features is its premium feature, which can be activated by watching an ad. This feature includes a power key simulator and auto SCREEN ON with a proximity sensor, volume booster, and lower brightness. Users can also set per-app volume, brightness, and button visibility, and the app's keyboard feature automatically moves the buttons up when the keyboard opens to avoid interruption in typing. However, users should note that the app requires permission to run the service in the background, which some phones may stop.

Overall, Assistive Volume Button is a convenient tool for Android users who want to control their phone's volume with ease.