iQueue is an app for iPhone from Elaydin Tech. There's a free version, which is very usable for everyone without many limitations. The full version ($0.99):
- Has no ads.
- Allows you to play Instant content with a single tap.
- Allows you to search by actor/director.
iQueue is very useful when you want to manage your DVD queue from your iPhone. It can also add/delete stuff from your Instant Queue if you want. The app is quite straightforward. You go to the search or browse tab to find a movie and tap the DVD button to add it to your queue. I am not sure how it handles TV shows with multiple DVDs. I am also unsure about Blu-Ray because I am on a DVD-only plan.
The app uses Netflix's official API - nothing shady. It keeps you logged in unless you sign out. It does everything as advertised. Keep in mind that iQueue adds movies to the top of your queue by default. Go to the settings at the bottom of the main screen to change this to avoid any confusion.
The app has a lot of useful functionality, but it doesn't look very good. The interface has a lousy, untidy and very dirty-looking design (mostly because of the background graphic). But the app's usefulness overshadows this in my case. Plus it has iPhone 5 support, so I'm good.