# iPhone 18 Pro Max: Is It Actually Worth Upgrading From My 17 Pro Max?

Every September Apple places a shiny new rectangle on a stage and somehow manages to make the perfectly excellent shiny rectangle already in my pocket feel vaguely Victorian.

This year, however, I have a particularly awkward decision.

I already own an iPhone 17 Pro Max with 512GB of storage.

Now Apple has unveiled the iPhone 18 Pro Max.

And naturally I want one.

But wanting one and actually having a sensible reason to spend the money are two entirely different branches of mathematics.

So I've looked properly at what has changed, what hasn't, how much the upgrade would really cost and, most importantly, whether any of it would actually make a difference to the way I use my phone.

I'm deliberately comparing like with like.

No sneaky storage upgrade to make the new phone look more attractive. My current phone is 512GB, so the replacement would also be 512GB.

| | iPhone 17 Pro Max 512GB | iPhone 18 Pro Max 512GB | | --------------------------- | ----------------------------: | ----------------------------: | | UK launch price | £1,399 | £1,499 | | Display | 6.9-inch ProMotion OLED | 6.9-inch ProMotion OLED | | Main camera | 48MP, fixed f/1.78 | 48MP variable aperture | | Telephoto | 48MP, 4x / 8x optical-quality | 48MP, 4x / 8x optical-quality | | Apple video playback rating | 37 hours | 43 hours | | Weight | 231g | 249g | | Chip | A19 Pro | A20 Pro | | 50% wired charge | about 20 minutes | about 15 minutes |

The 18 Pro Max 512GB is therefore £100 more expensive than my 17 Pro Max 512GB was at launch.

And immediately we can dispel one idea.

This isn't a dramatically different phone.

The dimensions are essentially identical. The 6.9-inch display is still excellent. ProMotion is still there. The telephoto still gives 4x optical zoom and an 8x optical-quality option.

In fact, viewed from across the pub, there's a fair chance nobody is going to know which one you've got.

Probably healthy for civilisation.

This is where the iPhone 18 Pro Max finally gives me something genuinely interesting.

The new 48MP Fusion main camera has a variable aperture.

Rather than the fixed f/1.78 aperture of the iPhone 17 Pro Max, the new camera can operate at f/1.48, f/1.8, f/2.8 and f/4.0.

That might sound like something designed specifically to make photography forums combust, but it has practical value.

At f/1.48 the camera can gather more light. At the smaller apertures it has greater control over depth of field and exposure.

And crucially, Apple is finally opening up more of those controls to the photographer.

The native Camera app on the 18 Pro models includes controls for aperture, shutter speed, white balance and a histogram.

Now we're talking.

For somebody who frequently uses an iPhone as an actual camera rather than merely something for photographing parking spaces and restaurant menus, that's a substantial improvement.

Apple is also claiming around 50% better low-light performance from the main camera. That is Apple's claim rather than an independently tested figure at this stage, but if real-world reviews get anywhere close, it could be excellent for evening landscapes, campervan trips and those moments when the light is disappearing faster than my enthusiasm for carrying the Canon.

There is also smart subject focus tracking, updated Photographic Styles and better low-light video.

For video, Apple has added more flexibility around cinematic effects and 4K Dolby Vision recording, while retaining the genuinely professional toys including ProRes RAW, Apple Log 2, genlock and 4K120 Dolby Vision.

The other two rear cameras haven't suddenly leapt two generations forward.

The 18 Pro Max still uses a 48MP ultra-wide and its telephoto is still centred around the same 100mm 4x camera with an 8x optical-quality 200mm option.

So this isn't a completely new camera system.

It is really the main camera that has received the headline hardware upgrade.

That's important.

If Apple had introduced a substantially larger telephoto sensor or a genuine new long-range optical system, my wallet might already have surrendered.

It hasn't.

Yet.

The second big improvement is battery life.

Apple rates my iPhone 17 Pro Max at up to 37 hours of video playback.

The UK version of the iPhone 18 Pro Max is rated at 43 hours.

That's six extra hours, or roughly a 16% increase using Apple's own comparable figures.

For normal life that is pleasant.

For travelling, camping, taking photographs, navigating, tethering devices and spending long periods away from a charger, it's much more interesting.

There is also quicker wired charging. Apple says the 18 Pro Max can reach approximately 50% in 15 minutes with the appropriate high-powered USB-C adapter, compared with roughly 20 minutes on the 17 Pro Max.

That's the sort of upgrade which doesn't produce spectacular advertising photographs but becomes surprisingly useful when you're trying to throw some charge into the phone before heading out.

And that price isn't just £1,499.

It's weight.

My iPhone 17 Pro Max weighs 231g.

The iPhone 18 Pro Max weighs 249g.

That's an extra 18 grams, or nearly 8%, despite the external dimensions remaining essentially unchanged.

249g is getting rather substantial for a telephone.

Put it in a case and we're heading towards “small telecommunications paving slab”.

I'd take the extra weight in exchange for significantly better battery life, but it definitely isn't an improvement in every direction.

Inside is Apple's new A20 Pro, built on a 2nm manufacturing process.

Apple says it brings around 50% more memory bandwidth, up to 40% faster graphics performance, double the AI processing capability and, helped by a redesigned vapour chamber, up to 40% better sustained performance than the A19 Pro generation.

Those are impressive numbers.

They should help particularly with intensive photography, video processing, gaming and on-device AI workloads.

But there is an elephant sitting rather comfortably on the benchmark chart.

The A19 Pro in my iPhone 17 Pro Max is already ridiculously fast.

Opening Messages isn't suddenly going to feel 40% more exhilarating.

Safari isn't going to bend spacetime.

For everyday iPhone use, I suspect the performance difference between these two phones will be difficult to notice.

The improvement matters much more when the phone is being worked hard for long periods, particularly processing video, gaming or performing intensive AI tasks.

This one surprised me.

I initially thought the new generation of Siri and Apple's expanding AI features might provide another reason to buy the iPhone 18.

They don't.

Apple's new Siri experience and the wider iOS 27 Apple Intelligence features also support the iPhone 17 Pro Max.

Apple has actually demonstrated some of those capabilities running on the 17 Pro generation.

The A20 Pro should process demanding AI tasks more quickly and has substantially more neural computing power, so there may be advantages as Apple's AI ambitions grow.

But buying an iPhone 18 Pro Max simply to get the new intelligent Siri would make little sense.

My existing phone gets it too.

That's possibly the biggest reason not to upgrade.

Apple has redesigned the Dynamic Island on the iPhone 18 Pro models.

It's smaller and can now display as many as three Live Activities simultaneously.

Nice.

Definitely better.

Would I spend £1,499 because of it?

Steady on.

This is where the argument becomes much more personal.

A new iPhone 18 Pro Max 512GB costs £1,499 in the UK.

One UK phone-buying service was quoting up to around £905 for a pristine iPhone 17 Pro Max immediately around the iPhone 18 launch, although actual values depend heavily on capacity, colour, condition and market movement.

If I managed something around that figure, the theoretical changeover would be roughly:

Now the upgrade becomes more interesting.

I'm not really deciding whether the iPhone 18 Pro Max is worth £1,499.

I'm deciding whether the difference between the two phones is worth roughly £600.

And for me, that's the key number.

If my real changeover figure creeps towards £750, £800 or more, I'd keep the 17 Pro Max.

Around £600, however, I start listening.

There is absolutely no reason for me to move up a storage tier simply because I'm buying a new phone.

512GB gives plenty of room for high-resolution photographs, offline media, apps and substantial amounts of video, while USB 3 transfer at up to 10Gb/s remains supported for moving large professional video files to external storage.

If 512GB works now, 512GB remains the sweet spot.

I'd rather put money into the actual phone upgrade than pay hundreds extra for storage I'm unlikely to use.

For the average person already carrying an iPhone 17 Pro Max?

That's the simple answer.

The screen is fundamentally similar. The design hasn't undergone some extraordinary reinvention. The existing A19 Pro remains extremely powerful. Apple Intelligence and the new Siri aren't exclusive to the new phone. The ultra-wide and telephoto cameras haven't received the sort of leap that makes the 17 suddenly obsolete.

The iPhone 17 Pro Max remains one of the best phones Apple has ever made.

But my answer is slightly different because of the way I use it.

Photography matters to me.

Video matters.

Travelling matters.

Battery life matters.

And the iPhone increasingly takes over jobs for which I once automatically reached for a dedicated camera.

That makes the variable-aperture 48MP main camera, proper photographic controls, better low-light capability, extra battery endurance and improved sustained performance genuinely useful rather than merely new.

So for me, I think the iPhone 18 Pro Max is sitting right on the border between extravagant and justifiable.

Which, irritatingly, is Apple's favourite place to put things.

I'm giving the iPhone 18 Pro Max upgrade from a 17 Pro Max a 7/10.

For most people: keep the 17 Pro Max.

For photographers, video shooters and people who regularly hammer their battery: the 18 becomes significantly more interesting.

For me personally: probably yes, but not on preorder morning.

There is one very good reason to wait.

The iPhone 18 Pro Max was announced on 9 September 2026, pre-orders begin on 12 September, and the phone reaches customers on 18 September. At the time of writing we have Apple's figures and some hands-on impressions, but not the full set of independent camera, battery and thermal tests.

So my plan would be simple.

Keep the 512GB capacity.

Wait for the independent reviews.

Pay particular attention to real low-light comparisons between the 17 and 18 Pro Max, real battery tests and whether that variable aperture genuinely produces better photographs rather than merely a longer specifications sheet.

Then get an accurate value for the 17 Pro Max.

If I can move from my 17 Pro Max 512GB into an 18 Pro Max 512GB for somewhere around £600, I think I'd do it.

If it ends up costing £800?

My 17 Pro Max and I will suddenly rediscover what a wonderful relationship we've had all along.

Funny how effective £200 can be at rekindling romance with last year's technology.