Can I make an iPhone app by myself?

For my senior project I was thinking f making an iPhone / iPad app for my school's website where students could access the announcements, homework assignments and maybe get a feed of the principals twitter. Is this possible to do on my own in a two month span and will it cost me anything? The app would be free. I have a lot if experience with Photoshop and a bit with inDesign. What programs do you use to make an app and where do you start? Any information would be helpful!

From what you described you would have to be Really experienced in programming (you use Xcode I believe for iPhone apps) the skills you have already don't help that much to be honest. As for the cost you need a Mac OS (or a virtual machine) and just download Xcode

Yes it is possible to make an iphone app on your own easily. There are many online free websites available for people to build any basic mobile app on their own even without much technical knowledge on coding. These below sites will help you to build your own mobile apps.
http://www.viziapps.com/
http://www.appypie.com/