I thought this app was overpriced at $4.99 but there are not many options for Dlink camera users so I gave it a try. I have DCS-900s and a DCS-5230 at my vacation home, connected to the Internet over slow DSL. Turns out the DSL is not so slow as this app brings up all cameras VERY quickly over 3G from another state! It controls the PTZ functions if the 5230 too, which alone was worth the $5 price! Its fast, smooth and slick. If you have a supported Dlink camera, this is the best app available!
Forced about D-Link++ Viewer