Getting Slower With Age: The Truth About OS Updates and Your Ageing Smartphone

Every autumn it happens like clockwork. Apple drops a new iOS version, Google rolls out the latest Android build, and within days social media fills up with the same complaint: "My phone is crawling since the update." It's a ritual almost as British as moaning about the weather. But is there genuine engineering substance behind those gripes, or is the perceived slowdown something altogether more convenient for the people selling you next year's model?

The Performance Paranoia Problem

Let's be honest about something upfront: humans are notoriously bad at objective self-assessment, and that extends to judging our gadgets. When you're excited about a new OS feature — say, iOS 18's improved Control Centre or Android 15's adaptive refresh tweaks — you're primed to notice every micro-stutter. Psychologists call this confirmation bias, and it's rampant in tech communities.

That said, dismissing the slowdown complaints entirely would be naive. In 2017, Apple was caught red-handed throttling the CPU performance of older iPhones through a feature it quietly called "performance management." The company argued, not unreasonably, that it was protecting ageing batteries from unexpected shutdowns. Critics — and a fair few regulators — argued it was a push towards the upgrade cycle dressed up in pastoral language. Apple eventually settled a US class action for $500 million and offered discounted battery replacements. In the UK, the Competition and Markets Authority launched its own investigation, though the settlement terms differed.

That episode poisoned the well. Now, every time an update drops and a three-year-old handset feels sluggish, the conspiracy runs the same loop.

What's Actually Happening Under the Bonnet

The technical reality is messier than either "planned obsolescence" or "pure paranoia" allows for. Here's what engineers will actually tell you, if you press them.

Feature bloat is real. Modern operating systems are genuinely more demanding than their predecessors. iOS 17 introduced Live Voicemail transcription, improved autocorrect machine learning, and richer widget APIs. Android 15 brought satellite connectivity frameworks and expanded AI processing. All of that requires RAM, processing cycles, and storage. A phone designed for iOS 14 three years ago has the same physical chip it always did — the software asking more of it is not a conspiracy, it's just progress.

Thermal throttling compounds the issue. As phones age, battery health degrades. A battery at 78% health delivers power less efficiently, causing the processor to throttle itself to avoid overheating during demanding tasks. This is entirely automatic and happens independently of any manufacturer decision — it's basic thermodynamics. Replacing the battery (more on that shortly) frequently restores a significant chunk of perceived performance.

Storage fragmentation slows things down. This is particularly relevant for Android users. As your internal storage fills up over years of use, read and write speeds drop. Apple's APFS file system handles this more gracefully, but neither platform is immune. Keeping at least 15% of your storage free makes a measurable difference.

Benchmark tests tell a partial story. Independent testing by outlets including Which? and Ars Technica has repeatedly shown that raw CPU benchmark scores don't drop significantly after OS updates on supported hardware. What does degrade is real-world responsiveness — app launch times, scrolling frame rates, and camera processing speeds. That gap between benchmark and lived experience is where the frustration lives.

What Manufacturers Say (And What They Don't)

Apple now publishes its performance management thresholds and offers battery health indicators in Settings. That's progress. Samsung, meanwhile, has committed to four years of OS updates and five years of security patches for its Galaxy S and A series flagships — a policy shift driven partly by competitive pressure from Google's Pixel line and partly by EU sustainability lobbying.

Google's own Pixel phones receive seven years of updates, which sounds impressive until you consider that a Pixel 6 running Android 15 on its original hardware will inevitably show its age in ways a Pixel 9 won't. The software may be supported; the hardware optimisation is a different matter.

What manufacturers consistently avoid discussing is the incentive structure. Slower phones drive upgrades. Upgrades drive revenue. Nobody at Apple or Samsung is going to stand on stage in London and say that quietly, but the financial logic is inescapable.

Practical Steps for UK Users

If your phone has started feeling like it's wading through treacle, here's what's actually worth trying before you sign another two-year contract:

• Check your battery health first. On iPhone, go to Settings > Battery > Battery Health & Charging. Below 80%? A battery replacement from Apple costs £85–£105 depending on model. Third-party repairers often charge £40–£60 for the same job (though more on that debate in our repair piece this week).

• Clear the cache (Android). Go to Settings > Storage and clear cached data. It won't delete your photos or apps, but it can recover meaningful breathing room.

• Disable background app refresh selectively. Both iOS and Android allow you to control which apps can refresh in the background. Stripping this back for apps you rarely use — news aggregators, social platforms — reduces the constant low-level demand on your processor.

• Wait a fortnight before updating. The first release of any major OS version is almost always buggier than the .1 patch that follows two weeks later. Patience costs nothing.

• Factory reset as a last resort. It's a faff, but a clean install of the OS on an older phone can genuinely transform performance. Back up properly first via iCloud or Google One, then start fresh.

The Verdict

Planned obsolescence in the cynical, deliberate sense? The evidence doesn't fully support that narrative — at least not in the way the Apple throttling scandal implied. What we have instead is something arguably more structurally troubling: an ecosystem where software expectations consistently outpace hardware longevity, where manufacturers have little commercial incentive to optimise aggressively for three-year-old devices, and where the path of least resistance is always a shiny new phone on a new contract.

That's not a conspiracy. It's just capitalism with a software update schedule. And for UK consumers paying an average of £600+ for a flagship handset, it's worth understanding exactly what you're dealing with.