Thanks for your thoughts.
Yes 18 was great on my 16e. It was fast and the battery life was very very good.
It’s still fast but similar to your anecdote, 26 has given it a 20-30% battery hit.
It’s obvious that it’s all the translucency rendering that it constantly has to do with Liquid Glass.
As to your advice. 26 is so bad I just can’t possibly imagine that 27 could ever be worse. Like you can with the Mac, I would love to downgrade to iOS 18 though.
I last had this feeling when I moved from 12 to 11 because 11 was so bad.
First, I never thought I’d see somebody articulate this here. Finally! Indeed, iOS 12 brought a 30% battery life impact… from iOS 9 rather than the immediately preceding version. Liquid glass is as awful as iOS 11 was on the iPhone 7 (and 6s) in terms of battery life, according to your and others’ reports.
Which I honestly thought I’d never see again. In fact, I frequently said that if you’re going to update once, you might as well update to the first major version, as it is generally fine (my 6s on iOS 10 has no difference with the one on iOS 13 when the latter ran iOS 9, it’s just as good as iOS 9). iOS 11 and 26 are the two major exceptions. Sure, iOS 13 incurred a slight battery life loss on the Xʀ, but it was slight and didn’t change the phone’s full day battery status at all.
Thing is, with 27 I have the same fears as with 12: even if it improves performance, no major iOS update has ever improved battery life. They’ve all worsened it barring some first major updates which maintained device quality (like iOS 10 on the 6s).
Remember the notifications on 11 that zoomed up and down the screen for no reason? And Apple even had an ad for the X where you saw this happening (until they fixed it - in the ad. Not in iOS 11).
But yeah like you my iPhone 7 suffered from the upgrade to 12 anyway.
Sure it was less buggy but it seemed to struggle with every day usage and its battery life had taken a huge hit - and that slim phone with Force Touch taking up precious space, already had a sub optimal battery.
Sadly (or perhaps not so sadly), iOS 11 was the only iOS version I never got to use between iOS 4 and 16, so I have no recollection of the zooming notifications, but yeah, it sounds both bad and unlike Apple.
I reached the same conclusion, like, iOS 12 isn’t awful in terms of performance on my 9.7-inch iPad Pro (and I say this coming from iOS 9 instead of 11), sure, there’s slight keyboard lag, but otherwise it performs similarly. Battery life is the issue. If my iPad suffered, I imagine a 4.7-inch iPhone suffered more (I have a 6s on iOS 13 which is far worse. You said 30%? Try 50-60%), and 30% on an iPhone 7 goes from a full-day iPhone with moderate use to pretty much garbage. I was charging my 6s on iOS 13 by 1 pm with 20% remaining when I was using it. My 6s on iOS 10? Still a full day iPhone with light to moderate use.
4.7-inch iPhones generally suffered a lot because it is exactly like you say: they do not have the battery life headroom to withstand these levels of software-induced loss. Even here, where we aren’t discussing their final versions (iOS 15 is unusable on them), we are still discovering that usage as a main iPhone was already at least difficult. I can tolerate 30% on my 9.7-inch iPad Pro because I still got 10.5 hours and I use it at home. You have a far harder time tolerating the iPhone 7 because you need the battery life. And that 30% loss translates into 3-4 hours of moderate cellular use, which is barely enough even for a pretty light user.
I unplugged my 16 Plus on iOS 18 at 5 am and I’ll get to the end of the day with 65-70% after 8-9 hours of SOT if I use it that much (which is very rare, but that’s the absolute top-end of my use).
I’d probably need to recharge my 6s on iOS 10 at the very end of the day with the same usage. I wouldn’t see 2 pm on the iOS 13 6s. Unplug your iOS 12 iPhone 7 at 5am and you’ll most likely need to charge unless you barely use it.
I can’t even imagine what SE users are seeing with iOS 26. It’s sad because this means that unless you stayed behind, pretty much all 4.7-inch iPhones (which I love and consider rather iconic) have an unusable battery life by the end. And they aren’t that great to begin with, since you have the reference, they hover at pretty much 50% of the battery life of an iPhone Xʀ on iOS 12 on their original versions, and maybe heavy use means that it’s even a little less than that. They just don’t have the headroom.
I’m lucky to have a 6s and an iPhone 8 on good versions. For music they just work perfectly well, with enough battery life for a full day of music listening.
We lost the headphone jack for Force Touch. No comment.
I actually love 3D Touch! I have it natively on the 6s with iOS 10, but do you want to know why it’s even worse than that? Because we lost the headphone jack for nothing. iOS 13 killed 3D Touch on compatible devices (all 3D Touch iPhones received iOS 13), so Apple removed the headphone jack then killed hardware-enabled 3D Touch anyway.
I gave in & bought an iPhone XR a few months later. Which again, was incredible on 12 and had battery life that was a day and and a half. That thing was a tank.
However, by 2021-22 and a few iOS upgrades or so… Well, you know the story.
So yeah - sadly, the lesson is to stay on the final point release of the major iOS version that your phone came with and to only accept security updates.
I used my iPhone Xʀ on iOS 12 as a main device for 6.5 years. Always on iOS 12. In fact, it’s right next to me and it still runs iOS 12. Apple literally advertised battery life on it. I get 16 hours of SOT, which for me means that with regular usage (and including the fact that for some reason standby battery life isn’t that amazing in the Xʀ, with it is on the 16 Plus, don’t know why) I’d get at least three full days. In fact, I was consistently finishing the third day with about 30% after about 13 hours of SOT. So yeah, more than enough.
Again, what you said matches what I’ve read on the internet AND what a friend had told me when they used the Xʀ: battery life started dropping with iOS 13 (very slightly), and by iOS 16 it was just poor relative to iOS 12. So much so that they gave the device to a family member after upgrading to the iPhone 13 and by the time iOS 16 dropped it didn’t have enough battery life for one day (the Xʀ!!!! Are you kidding me? It is insane on iOS 12. What do you mean battery life isn’t good enough? That was my reaction).
Anyway, when you see through the smoke and mirrors of Apple’s marketing, most iOS upgrades don’t have anything that is truly a must have.
The upgrade value is in new hardware.
Finally someone also says this! We have a typical usage pattern that generally does not change much with new iOS versions, the only features worth our time are Apple’s hardware features (like Dynamic Island! I use it quite a lot because I like it) or the camera features of the 16 Plus (of which the iPhone Xr has none).
If you want an upgrade just upgrade the phone itself. Like you said, most iOS updates have features that make you say “wow, that is cool”, but that you either end up not using or they don’t fundamentally change how we use our devices. And for that we gave up… what? A massive chunk of performance and 50% of the device’s battery life? No thank you.
I don’t know if you keep your devices, but it’s especially worse if you do. I do. And I’ve had to charge the 6s on iOS 13 just as a music device in the middle of the day, whereas the iPhone 8 on iOS 14 has full-day music battery life. It’s about twice as good, as I’ve said. And before anyone keeps shouting about battery degradation, it has 2300 cycles and it has like-new battery life. Imagine if I’m going to care about that when battery life is good regardless.