In order to be able to get your applications published on the App Store, you need to be registered as a developer with Apple. There is another added benefit of being a registered developer—you will be able to test your software on the device. This is the only way to do this. And as the simulator's performance is unreliable, you will eventually have to do that, and I suggest that you get it as soon as possible, especially if you are working with games – rendering on iOS simulator is very slow and laggy. You can get very severe frame rate drops in most trivial situations, where even old devices will show a solid 60 frames per second.
In order to register as a developer, we need to perform the following steps:
Create an Apple ID or log in to the iOS developer portal available at https://developer.apple.com/register/index.action.
As the next step, you will have to accept the legal agreement with Apple about your rights and duties as a developer.
After accepting the agreement...