apple developer account

These accounts allow you to:
Get access to beta versions of the OS and development tools. Program participants get early access to new versions of operating systems and development tools, such as Xcode.
Test on real devices. This allows you to identify and fix bugs before releasing the application.
Publish to the App Store. Only program participants can publish their applications to the App Store, which opens up access to millions of users around the world.
Get access to extensive documentation, video tutorials, and forums where you can get help from the developer community and Apple experts.
Get analytics tools. The ability to use analytics tools to track application performance and user behavior.