re: App creating help

There's plenty of ways you can build an IOS app outside of Xcode, but as far as I know most methods will still need Xcode to compile the IPA and provision for app store submission. If you don't have a Mac, you can use something like MacInCloud for the final stages before submitting your app. I think Cordova(formerly PhoneGap) may be able compile the app on their servers for you.

What kind of app are you trying to build? If it's something relatively simple there's a bunch of services out there to build cross platform apps. You can try Goat Apps