Although Apple's iTunes App store says Display Duet supports 5.1.1 on any iPad, the developer's website says iOS 6. I tried to repurpose an old iPad 1,1 running 5.1.1 but the App crashed every time. I got a note after 3 days from the developer that they are working on support for 5.1.1 in January but I went for an iTunes refund instead (nightmare of being on hold and cutoff). Now the price has risen to $14.99 I think I'll forget it altogether.
12/24/14 at 2:16pm