Expect only a few new features in the next versions of iOS and OS X as Apple is about to change its upgrade cycle starting with iOS 9 and OS X 10.11 which is set to focus largely on quality. Industry observers predict that the devices' improvement in terms of performance and stability are to be the priority, which can also mean to benefit older devices released three to four years ago.

In 2013, Apple released iOS 7 that featured a significant change in the operating system's overall look and feel but along with these changes came problems in speed and numerous bugs particularly on iPhone 4 and iPhone 4s. In fact, these complications still exist even until today's version of iOS. The new iOS 9 will attempt to resolve these issues.

Apple reportedly built a core version of the new OS designed specifically for old devices.  With iOS 9's capability of stabilizing and putting the older devices in good shape, the company is guaranteed that its its old models will stay around longer in the market.

Though the stability feature is the main focus of Apple's new operating system, it also reportedly offers new additional upgrades in its security setting.  A major addition named "Rootless" is said to be included that defends a device from malwares and keep its data safe by blocking access to essential parts of the OS. This upgrade is also supposed to make it more difficult to jailbreak Apple devices. However, initial reports say this feature can be deactivated on OS X.

Other than that, the new iOS 9 will also include transitioning more applications over to iCloud Drive and a smarter encryption whenever the device is connected to an unfamiliar Wi-Fi network.

As for OS X, Apple plans to include an iOS-like control center which offers quick and easy access to frequently used controls. The rest of the new iOS 9 details are still under wraps but it is expected to be rolled out this year at World Wide Developing Conference (WWDC 2015) in June.