My iPhone 6 (4.7") was slow with the version of iOS that it launched with. It's possible I had bad hardware, or maybe the hardware has trouble handling the bigger screen (have a 5S that always felt faster than the 6, all the way up to iOS 10.3.3 so far, will try iOS 11 soon on it). The plus model is probably even worse since it has to render to a much larger resolution and then downsample.
I'd go as far as to say the iPhone 6 is the worst iPhone I've ever owned, the only one I was really unhappy with. The 6S was a huge improvement over the 6 for me. My wife has an iPhone 6 on iOS 10 and has been complaining about it being slow for a while, but previously didn't have a problem.
Though it's not outside of Apple's capabilities to make things smoother. I don't think Apple intentionally cripples old phones, but performance of older harder is never a priority in .0 releases. Historically they do sometimes come back and address the issues with older hardware later.
That said, my 6S was stuttering for a day or two after upgrading to iOS 11, but started running smooth after that. Maybe some background processes working?
Side note: iPhone SE (which has 6S internals) is ridiculously fast on iOS 11. It's always easier to achieve better UI performance at lower resolutions.
I'd go as far as to say the iPhone 6 is the worst iPhone I've ever owned, the only one I was really unhappy with. The 6S was a huge improvement over the 6 for me. My wife has an iPhone 6 on iOS 10 and has been complaining about it being slow for a while, but previously didn't have a problem.
Though it's not outside of Apple's capabilities to make things smoother. I don't think Apple intentionally cripples old phones, but performance of older harder is never a priority in .0 releases. Historically they do sometimes come back and address the issues with older hardware later.
That said, my 6S was stuttering for a day or two after upgrading to iOS 11, but started running smooth after that. Maybe some background processes working?
Side note: iPhone SE (which has 6S internals) is ridiculously fast on iOS 11. It's always easier to achieve better UI performance at lower resolutions.
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