A free app for Android, by PreSonus Audio Electronics Inc..

UC Surface is a powerful mixer control app that allows mixing from any device, including your iPad. It’s built on top of the latest audio engine and has an interface that’s designed to make mixing easy.

This app provides complete mixing control from your iPad. You can mix from any source, including your computer, and control every aspect of the mix, including effects, preamp, and mains.

UC Surface works with all mixing platforms, including preamp-equipped audio interfaces. It also supports USB and Bluetooth mic and line-in inputs. You can mix to any stereo aux channel, and control all the way to your stereo output.

It works on all iOS devices and has a powerful user interface. It’s designed to let you mix quickly and easily, without the need to install software or use a complicated interface.