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.
Fly leaders have three sections: butt, midsection and tippet. Fly leaders are tapered from the thick, heavy butt to the narrow, thin fly tippet to help turn the fly over in casting. Fly fishing leaders are either hand-tied, with segments between knots; or they are knotless with a continuous taper from butt to fly tippet end.