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.
Dry fly trout fishing. Dry fly fishing is done with line and flies that float, joined by a leader, usually made of fine polyamide monofilament line. The tapered leader is 3 to 5 meters long, thus nearly invisible where the fly is knotted, and the angler can replace the last meter of nylon as required.