Unity Pro license

Ok, I have some doubts after reading the end user license aggrement.

I am using unity free + iOS till now. Now if i want to purchase unity pro license and iOS pro license then my iOS license will be wasted? And one more thing…Could i use my earlier unity projects in unity pro?

Upgrading a Basic license to a Pro license is the difference in price between the two. So there is no money “wasted”. Unity Pro is not a separate app, it is just a license, so of course you can still load your earlier projects.