It was updated through (and including) version 3.1.3 (release date February 2, 2010). The first generation iPod Touch and iPhone have iPhone OS 3.1.3 as their newest available version. All iOS versions from 3.2 until 4.0 were made specifically for the iPad.
What do you need? What are the bare essentials you need to get started in fly fishing? Well, you need that basic rod, reel, and line outfit in one form or another. You need a rod, you need a reel, you need a line, and you need a leader.
See what you really need to get started fly fishing. Learn how to start fly fishing in this informative video from Orvis. You know, I think one of the things that intimidates people about fly fishing is a vision of a fly angler with waders and vests and creel and all these gadgets hanging from the vest.