Have been using this app for 7 months now to monitor 3 D-Link IP cameras. Ive used the app with an iPhone 5, iPad Air, iPad 1, and iPhone 4S. Initial setup: it quickly scans and locates the cameras, auto selects the model number, and lets you customize the name and position of thumbnail images (e.g. northwest facing camera on the left, north in the center, and northeast on the right). Have had ZERO crashes and theres plenty of help documentation and support links just in case -- its just not been needed. No ads, of course, with the paid version (I dont remember if there is a free version). Its even convenient from a Siri standpoint in that she easily recognizes the phrase "Launch D Link" every single time. Also, just used it recently with iOS 8 and have experienced 100% reliability. And Im talking about the app running continuously on a plugged-in iPad (auto lock disabled) for 3 or 4 days at a time. I do have several other IP camera apps (including the one developed by D-Link) and this one is the best. End of review.
flyinghatchet about D-Link+ Viewer