When I have Lenovo laptop with Windows 8.1 what kind of program I should use ?

well, you wont be able to actually create an iPhone app on your windows machine if thats what you are hoping. To create iOS apps, you have to use Xcode, which only runs on OS X, not windows. You could do the C portion of the course (the first half of objective c basics) using an IDE such as Code::Blocks. If you wanted to run OS X on a virtual machine you could try that, but know that this violates Apples TOS.

If you want to do mobile app development on windows, check out the Android Track. Android development works great on windows and OS X

Janko Kraloscek - There are services in the cloud that let you emulate an OS X desktop w/ access to Xcode. I won't name any, cause I don't want to be a shill, but they are available and not overly expensive. Just sayin'. :) Google it.

As for saying iOS is better than Android, or vice versa, the right answer is NEITHER. They both have their pros and cons. Try BOTH and pick the one YOU like better.

Ok thanks. I will look at Android Track but iOS is better :-)

If you only have access to Windows, you could try out some C in a simple IDE. For a beginner, like me, you might want to check out "NewbieIDE". I found it to be simple and lightweight. Just what I need.

http://newbieide.codeplex.com/