Volco allow you to change your device volume immediately, from widget or application.
Setting parameter to your device volume, touch setting button. To set setting from your device, long press setting button. Especially, you can select to set volume each stream. For example, only multimedia volume is changed from setting button.
It contains widgets to set volume. Rotation Widget has two button, upside to set previous setting, downside to set next.
This application has timer function, too. You can change your device volume setting at time as you want.
Old name is Volcon.