So, I think Duet Display will still be my primary app, but after DD came out, Air Display had to start losing active users in droves as they moved to Duet's 'no lag' USB < > Lightning connection. Just today, Air Display released v3.0 to allow connection via Lightning < > USB to match Duet Display in quality. That said, Duet is still more beautiful a brand / app icon, IMO So, I wonder if the $5 savings for Air Display, comparatively, will attract people and save Air Display.