Here’s a fun twist. The biggest iPhone Apple has ever made is also the priciest. Same phone. The iPhone Duo, to be exact, which nobody can actually buy yet. Odd timing, but here we are.
I meant to check one screen size. Instead I ended up knee-deep in old price tags, a few model names that never existed, and way too many spec sheets. Some of it surprised me. So this guide covers the largest iPhone to date, the costliest one, what the very first iPhone sold for, and what it really takes to build one.
What Is the Largest iPhone to Date?
The Duo takes the crown
Short answer: the iPhone Duo. Open the thing up and there’s a 7.6-inch screen inside, which Apple says is around 50 percent more area than an iPhone 18 Pro Max gives you. Fold it shut and you’re left with a 5.4-inch outer screen. So it’s pocketable and huge, depending on the moment. Apple also says it’s the thinnest iPhone ever, at least when it’s unfolded.
Pre-orders don’t even open until October 16, and the phone itself ships a week later, on the 23rd. So if you were about to go looking for one, save yourself the trip. Years of iPhone rumors had it as the Fold or the Ultra, so the Duo name still sounds odd to me.
The biggest slab iPhone
Type “What’s the biggest iPhone?” into Google and you’ll get two answers. One is the Duo. The other is the traditional slab kind, and there the winner is the iPhone 18 Pro Max. That one’s been on sale since September 18. If you want the dates, colors and specs, they’re all in our iPhone 18 Pro Max launch guide.
Skip the iPhone 18 Pro Max rumors, because the real phone is already out. The screen didn’t change (6.9 inches, same as the last two years), but the weight did. It’s 249 grams, if you’re wondering. That makes it the heaviest Pro Max Apple has shipped. The 2026 iPhone lineup is oddly small so far, with two Pros and a foldable, while the regular iPhone 18 reportedly waits for spring.
A Short History of Big iPhones
Funny thing about big iPhones: they weren’t always a thing. The first one had a 3.5-inch screen, which sounds like a toy now, but nobody complained in 2007. Roughly, the size race went like this:
- iPhone 6 Plus (2014): 5.5 inches, from $749 unlocked. The first properly big one.
- iPhone XS Max (2018): 6.5 inches. Where the Max name started.
- iPhone 12 Pro Max (2020): 6.7 inches.
- iPhone 16 Pro Max (2024): 6.9 inches, and it’s been stuck there ever since.
- iPhone Duo (2026): 7.6 inches unfolded. After years of tiny bumps, that’s a genuine jump.
The 6 Plus is the one that stuck with me. The bending jokes were everywhere (remember that?). Didn’t matter. Apple still moved ten million iPhone 6 and 6 Plus phones in that first weekend. Big phones won that argument fast.
Here’s what stands out to me. Bigger phones tend to cost more, and that pattern keeps popping up below.
How Much Did the First iPhone Cost?
So, the first iPhone. It landed on June 29, 2007, in two versions, 4GB for $499 and 8GB for $599, and either way you signed up for two years with AT&T. A couple of months later, in September, Apple cut the 8GB one to $399. It dropped the 4GB version too. Early buyers weren’t thrilled.
Sure, $499 sounds cheap now. But a price history breakdown figures it’s closer to $800 in today’s money. Meanwhile, the iPhone 18 Pro Max price starts at $1,299. Big gap.
Fast-forward to 2014. The iPhone 6 MSRP was $649 for the 16GB model if you paid full price and only $199 if you took the carrier contract. That contract math hid the real number for years. It’s a big reason a $199 phone felt normal, even though it wasn’t.
The Pro line, for its part, sat at $999 for something like six years. Then came $1,099 with the 17 Pro, and now $1,199. I don’t love where that’s heading. Nothing about that curve is gentle.
What Is the Most Expensive iPhone?
The Duo tops the price list
Once again, it’s the Duo. The base price is $1,999 for 256GB, which is already a lot, and the 2TB version runs all the way up to $3,199. That’s the costliest iPhone Apple has ever priced, by a mile. Nothing else is close.
Why so much? The folding OLED screen, the precision hinge, a second display and a titanium structure all add cost. Titanium iPhones left the Pro line last year, so it’s kind of funny that the priciest phone brings the metal back.
The most expensive slab
Among traditional models, the top price belongs to the Pro Max. It starts at $1,299. Then you max out the storage, and it reaches $2,499 at 2TB. The Pro Max costs $100 more than the smaller Pro at every storage tier, so the big screen isn’t the expensive part. Storage is.
Honestly, I can’t picture who needs 2TB on a phone, but maybe I’m wrong. Somebody out there shoots a ton of 4K video, I guess. So the most expensive iPhone in the slab category isn’t a fancier phone, it’s the same phone with more storage.
How Much Does It Cost Apple to Make an iPhone?
Everybody wonders about this one, usually about two seconds after seeing the price tag. The true iPhone 18 cost to build? Nobody outside Apple knows it. I looked for a credible teardown of the new Pro Max and came up empty, at least so far.
Older estimates give a rough idea. Here’s what I found. Counterpoint Research figured the iPhone 15 Pro Max cost about $502 in parts, and it sold for $1,199. Then a popular 2025 breakdown had the iPhone 17 Pro Max at roughly $408. That one leaned on unnamed industry data, so I’d take it with a grain of salt. The two numbers don’t match, which tells you how shaky all of this is. Estimates swing depending on who’s counting.
Here’s the thing, though. A parts bill isn’t profit. It leaves out chip design, assembly, software, and marketing. So a $1,299 phone with a parts list somewhere between $400 and $500 isn’t $800 of pure margin. Memory is one line on that bill, which is why this year’s memory shortage matters.
iPhones That Never Existed
Searches for the biggest and priciest models drag in a lot of made-up names. So here’s a quick reality check, plus a few iPhone facts that trip people up.
There’s no iPhone 9. None. After the iPhone 8 came the iPhone X in 2017, and nine just never got a turn. So if you see an iPhone 9 price online, somebody’s guessing. Usually they mean the 2020 iPhone SE, which the rumor sites were calling the 9 before Apple picked a name. That SE started at $399.
An iPhone 9 Pro Max? Nope. The Pro Max name didn’t even exist until the iPhone 11 Pro Max in 2019. And there was never a 9 Plus iPhone.
The small end has gaps too. There’s no iPhone 10 mini, for the simple reason that minis didn’t start until the iPhone 12 mini. And forget an iPhone mini 16, since the iPhone 13 mini was the last one Apple made.
Is the Biggest and Priciest iPhone Worth It?
My picks, for what they’re worth:
Want the biggest screen you can pocket: Get the iPhone 18 Pro Max. Apple rates the battery at up to 45 hours of video, versus 31 on the Duo’s inner screen, so it’s the one that lasts. It’s heavy, though. You’ll notice.
Curious about the Duo: Wait for reviews. It doesn’t ship until October 23, and it has no telephoto camera and no Face ID, which is a weird thing to give up at $1,999.
Still deciding between platforms: Read our iPhone vs Android breakdown before you spend a cent. Other brands sell foldables too, and a few of them cost less.
I’m watching one thing now: whether the Duo’s price holds after the holidays.
