To download Netflix Mobile, just search for the app in the Android Marketplace, Apple iTunes Store, or Windows Phone 7 Marketplace. Log in with your existing Netflix username and password, and instantly stream movies already listed in your Instant Queue. You can download the app without being a subscriber, but it won't do anything. In that case, try the company's free month-long trial to see if you like the service.
If you have a Droid, check Netflix's database of devices to see if your system is compatible. The reason for the exclusivity is that Android phones are "fragmented," which basically means phone manufacturers and carriers have customized so many types of Androids that each one needs its own app [source: Krazit]. Each app takes time to develop and Netflix is working on this. Apple and Windows users have total integration, or zero variance in their mobile systems. Total integration lets every Apple product (iPad, iPhone, iPod Touch) and Window 7 Phone access any apps launched for them.
Another thing to watch out for is a device limit. While Netflix lets you register up to 50 devices per account, only six can be active at one time. So the more phones and tablets you activate, the fewer computers, DVD players, and streaming boxes (like Roku) you'll be able to use at home. If you have the most comprehensive Netflix subscription (currently $51.98 per month for unlimited streaming and DVDs, eight at a time) up to four mobile devices can stream simultaneously. But lesser subscriptions allow only one or two devices to stream at a time [source: Netflix].