Update: The fastest way to take screen grabs from the iOS sim is to press cmd+S or File>Save in the simulator menu. This saves a PNG file to your desktop!
Taking iPhone screenshots for iTunes Connect app submission can be a painful and tedious job. I used to take them on the real device and transfer them over to my Mac using iPhoto. I knew there MUST be an easier way than this!
There is. And it’s free. It’s called the iPhone Simulator Cropper. It lets you easily take screenshots of your app as it runs in the simulator on screen. Images are sized perfectly for app submission, including landscape screenshots. It even works for taking larger iPad shots.
You can also use the cropper to create beautiful screenshots for promotion on your website. Here are a few examples: