When iOS 7 comes out in the fall, will it be free?

I've read the if you would currently like iOS 7 for iPhones and iPads, you have to pay 99$ unless you install a UDID or something like that, then it's five. I don't think that it is really worth it to pay, so I just wanted to wait until the fall until it comes out. But I was wondering if anyone knew… When it come out in fall, do we still have to pay for it, or is it just like any other software update? I was really looking forward to it, but if you still have to pay I just don't think it's worth it. Does anyone know?

It will be free, the 99$ wasn't for the OS, thats the cost to be a developer.

It's free in the fall, or $5 now through http://www.udid.in/