According to 9to5Mac, which has been hammering out the leaks this week, the new OS will have a 'quality focus' and place more emphasis on compatibility with some of the older iPhones and iPads still lurking around.
The report says handsets like the iPhone 4S and the iPad mini will be boosted by the launch, which will bring stability and performance efficiency.
In the past, Apple has continued to support devices like the aforementioned with software updates. However, the bold new range of features - and extra power and memory required to power them - have often damaged the user experience and the battery life of legacy devices.
Last year, the firm revealed iOS 8 would continue to be available for the iPad mini, iPhone 4S and iPad 2, even though the latter two devices have been removed from sale.
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The report lends credence to recent reports suggesting iOS 9 will be less about new features and more about improving the overall experience.
The company is expected to add HomeKit support, the relaunch of Beats Music, perhaps change the default typeface to match the Apple Watch and probably add public transit directions to Apple Maps.
All in all though, it seems like there’ll be few overhauls this time around, which could reward those who’ve looked after their older devices down the years.