03D Remote is an iOS App for remote control of the Yamaha 03D series of mixing consoles via WiFi. To use the App, you must have UMMU Server installed on the host computer (A free download from the StrongSoft website).
Or you can use UMMU Box, a standalone interface manufactured by StrongSoft, and available on eBay. UMMU Server is a free download from the StrongSoft website.