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 Rod. A good fly rod for stream fishing would be a 7 Â½ to 9 foot 4 to 6 weight rod. Match this with a disc drag or single action fly reel spooled with 50 yards of Dacron backing; along with a weight forward floating line (matched to rod) with a 9 to 12 foot tapered leader with a 4X tippet.