Apple's unreleased and next generation iOS 9 has shown up in newly released data running on iPads and iPhones and a new iOS 9 concept video gives us a glimpse at possible new features.

At Apple's WWDC 2014, the company showed previews of Mac OS X 10.10 Yosemite and iOS 8 before releasing the final versions of the desktop and mobile OS to users in the fall. It's safe to assume that Apple will use this year's WWDC 2015 to once again showcase its next-generation Mac OS X and iOS 9 at the event and new evidence shows that it's already testing iOS 9 on current iPads and iPhones.

Mobile app marketing platform Fiksu released data that shows Apple is publicly testing iOS 9. According to the company, it has seen 145 specific IDFAs (Identifier for Advertisers) of devices running iOS 9. 92% of the iOS 9 devices have originated from the U.S. and 63% have been identified as iPhone 6 and iPhone 6 Plus, 12% are iPad Air 2, 12% are iPhone 5s, and 13% are listed as "everything else", which includes iPhone 5, iPhone 5c, iPhone 4s, iPad Air, iPad mini 3, and iPad mini 2.

While there haven't been any leaks in terms of new features iOS 9 will bring with it, a new iOS 9 concept video created by Ralph Theodory gives us a glimpse of what Apple may have in store. The video begins with a "Search in Settings" feature OS X already includes, which allows users to easily find settings and options by typing in the Settings app and narrowing down results. "History in Settings" displays every change you've made, making it easier to undo any changes with a single tap. "Color Look" allows users to customize the look of iOS 9 by choosing a color scheme that gets applied to buttons, UI elements, and Control Center.

A feature called "Night Mode" provides a better viewing experience in low light environments and also helps save battery life. An update to iOS 9's App Switcher introduces a button that will close all apps with a single tap instead of swiping up all currently running apps. "Round Springboard" brings the look of the UI of Apple Watch to iOS 9 and allows users to zoom in and out of a single Home screen page.

Check out the video below to see more of this cool new iOS 9 concept in action.