I'm not up-to-date on recent versions of Fritz, but I think that the *main* differences between XII and its forebears have to do with the user interface, which has been completely overhauled. Versions 10 or 11 will certainly analyze and store your games, in any case.
On the iPhone-app front, I personally prefer Shredder to Fritz. I reviewed my favourite chess apps in this blog post, if you're interested in more detail.
Cheers
I'm thinking about getting a version of Fritz chess software. Fritz 12 looks nice but it's a lot more expensive it seems than 10 or 11. Is there a huge enough difference to be worth the extra money? And will all three analyze my games and save it in PGN (or whatever it its) format?
Also, I am thinking on getting an iPod touch chess app. I like the looks of the Fritz Chess one, and the Shredder chess. Which one is better? Do they both calculate your Elo rating based on the games you play on them?
Thanks for any input.