I just downloaded it. Pretty cool, how about some ballistics for .177 and .22 caliber pellets? I have a program on my desktop called Chairgun that runs pellet ballistics. Of course, my desktop doesn't fit in my pocket as well as my itouch.
That's a really good question... I haven't been tracking my time, like I should be, but I figure the 2.0 update took about 150-200 hrs of design and development time.
A lot of that is time is spent coming up with interface layouts; Trying it out, hating it, then tweaking it, trying it out, hating it less, tweaking it more, etc...
Also, this time around, I added a whole shwack-load of ballistic profiles, each of which I looked up manually in order to verify it's correct B.C.'s and muzzle velocity using the [awesome] book "Ammo & Ballistics 3 - Third Edition"... According to one of my competitors, v1.2 had some erroneous B.C.'s, so I wanted to ensure that those were all corrected and any additions were as accurate as possible (hence the use of real-world numbers, as opposed to factory-specified numbers).
For clarification, this will work in an Ipod Touch?