According to 1Password on my iPhone, I have 70 different passwords. That's for websites, work stuff, certain applications, etc. And I know for a fact that is not all of them. Those are just the ones that I remember to enter in.
I'm actually pretty good about remembering my passwords. But it's a PITA to have to do a "forgot password" thing for some website I haven't logged into in 6 months or something. It is way easier to just look it up. And since I always have my phone on me, 1Password is a life saver. Luckily, I picked up the Pro version a while back when it was on sale.
To be honest though, I don't think it would have mattered if I got the Pro version or the regular version... I honestly don't know the differences. Wait... I'm going to go look it up... brb.
... (no, seriously, i took a break here to google it) ...
Ah, here we go... you can read about the differences on Agile's website. Nothing crazy, but like I said, I got a deal I think. I don't remember - it was a while ago. So which should you buy? I don't know. Most of the stuff I've read says that if you think you might eventually want some of the Pro features, buy that first and get it out of the way (honestly, it's worth it). They don't really have an effective "upgrade" price in place (which sounds like an iTunes problem). So if you choose to get the standard version first and have to pay for it, you'll have to pay again for the Pro version.
Anyway, so I have my 70+ passwords in there. I also use the Wallet function for my bank account numbers, reward member numbers (delta airlines, hertz, etc), and various other things. There's also a Software grouping where I store my product keys for the Windows versions I have. I have a ton of other license codes I should probably put in there too. That's a whole other mess. But honestly would let me take advantage of the app even more. Not that I need my product codes or anything like that away from my computer - but it's nice to have them somewhere besides my computer... just in case.
All of this is of course protected by a passcode and various security settings. So if you have a passcode to unlock your iPhone (or iPod touch) AND this passcode, there isn't anyone getting into your stuff.
Sound interesting? I definitely recommend it. Especially with the ridiculous number of passwords I have discovered that I have.