Apple has released the first public beta of iOS 9 to for download. Though a public beta, it’s not an open program. The iOS 9 public beta is available to only those who’re involved in Apple Beta Software Program.
iOS 9 is full of enhancements you’ll appreciate every day. Your apps become more essential. New multitasking features on iPad make you even more productive. Siri can do more than ever, and new proactive suggestions help you get things done before you ask. And improvements at the foundation of the operating system enhance performance, battery life, and security.
Since this is a beta version, some of your apps might not work on this version of iOS 9. This is intended for testing phase only.
If you want to involve in future public beta programs, then register yourself at Apple Beta Software Program.