Apple’s new iOS 9 platform is already running on an impressive number of iOS devices right out of the gate, but the operating system isn’t entirely free of flaws. Certain bugs can affect its performance, and older devices might not be as fast on iOS 9 as you’d expect – in fact, a thorough video comparison between all iPhone models that can run iOS 9 showed that the new OS is slightly slower than the iOS 8.4.1, though it does show significant gains when it comes to Wi-Fi speed and browsing.
Some iPhone and iPad owners may experience a slower iOS 9 performance, but there are things they can do to combat lag and speed up iOS 9.
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