So you want to start developing apps?
There are a few things you will need to get started. First, you will need a Mac. No iPad or iOS devices will not work, you will need an Apple computer that runs OS X 10.9 or higher. If price is an issue, you can pick up a used Macbook on craigslist or eBay for under $500 bucks. Otherwise, the Apple Refurb store is always a good option.
Next you need to open the App Store app on your Mac. You can launch this app by clicking the search icon in the upper right corner of your screen. Then type in the words "App Store". The app will launch and you will see the home page. Next in the search box at the top of the App Store, search "Xcode". Xcode is the mac app used to make iOS and other apps. Click the first result with the big blue icon. Next, click the "Get" button then click "Install App". Your Mac may ask you to sign in with your App Store login. This is the same login you use to install apps on your iPhone.
Xcode will start to install, this could take between 30 and 40 minutes. You can track the installation process in the "Purchases" tab at the top of the App Store app. Once the app is done click "Open" and Xcode will launch for the first time. Congrats! You have now successfully install Xcode onto your Mac. You are now ready to start making apps.