Michael Swan, a developer for iOS devices and Mac OS X as well as an ETCP-Certified Entertainment Electrician, has upgraded the DMX calculation app for the Apple iPhone, now DMXRef version 1.2, that harnesses the multitasking in iOS 4.0 allowing users to quickly toggle back and forth between apps. A separate tab for major functions keeps interface clutter to a minimum, including a dipswitch tab, auto addresser tab for several fixtures of the same type, and a universal converter tab for older consoles that require entering addresses in the form of 513 (global address) rather than 2/1 (local address). The new version can also accommodate ETC Dimmer Doubling.

Minimum requirements for this app are an iPhone or iPod Touch with at least iOS 3.0 (iOS4.0 is required for multitasking).