Apple Watch Ultra 4 is coming in September 2026, and the leaks so far are actually interesting. More sensors, Touch ID, a slimmer case, and a new chip.
We’ve gone through the supply chain reports and developer code so you don’t have to. Here’s what’s real, what’s not, and whether it’s worth holding off on Ultra 3.
Apple Watch Ultra 4 Leaks: Quick Summary
- Doubled health sensor count (supply chain sources)
- Blood glucose — not happening in 2026
- Touch ID spotted in leaked Apple developer code
- MicroLED display — not in 2026 either
- Slimmer build and fresh exterior design
- Price — probably $799, maybe a bit more
- Better efficiency from a new chip
- Launch — early September 2026
Doubled Health Sensors — and It’s Not Just About Adding New Ones
This one comes from Digitimes, which has a solid track record on Apple supply chain news. According to their sources inside Apple’s manufacturing partners, Ultra 4 will double the number of sensor components over the current model.
Ultra 3 already tracks heart rate, ECG, blood oxygen, skin temperature — it’s not exactly light on sensors. So doubling them is a real hardware investment. But here’s the part most coverage skips: the goal isn’t necessarily a bunch of new health features. It’s to make the existing ones more accurate.
Right now, the watch leans on software to fill gaps in its hardware. More sensors means better raw data, which means the watch stops guessing as much.
Heart rate variability, sleep tracking, and hypertension detection should all get more reliable — even if you never see a new health icon on your watch face.
The new sensors will allow Apple to minimize its dependence on algorithmic data interpretation — which could lead to better health data, improved performance, and battery life.— Digitimes, citing Apple supply chain sources
So what about blood glucose?
Not in 2026. Multiple analysts — including PhoneArena — say Apple’s non-invasive glucose technology still isn’t accurate enough to ship.
The regulatory bar for blood sugar readings is high, and Apple won’t put something out it can’t stand behind. A more realistic near-term upgrade: actual blood pressure numbers instead of just a “you might have hypertension” alert.
That alone would be a big deal. For a baseline, see how Ultra 3’s current health sensors actually perform.
Finally, a New Look — Three Years After the Last One
Put an Ultra 1, 2, and 3 next to each other. You’d struggle to tell them apart. Same titanium case, same flat display, same Action Button and Digital Crown placement — unchanged since 2022. Ultra 4 is expected to break that streak, though it’s not going to look like a completely different product.
Supply chain sources say there are “alterations to the exterior design.” Some earlier reports floated a big redesign, but more recent leaks have pulled back on that. The current read: noticeably different, not unrecognizable.
- Thickness – 10–15% thinner
- Display – Slightly larger
- Material- Titanium stays
The main change most people will notice is a thinner case — somewhere around 10–15% slimmer. If you’ve ever found the Ultra a bit much for daily wear, that’s worth caring about.
Quick context on why earlier “big redesign” talk cooled down: when microLED was still on Apple’s 2026 roadmap, a larger case was expected alongside it. MicroLED got pushed back, and the more dramatic case plans went with it.
Touch ID Is Coming to Apple Watch — Here’s How We Know
This didn’t come from a supply chain tip. Macworld‘s Filipe Espósito dug into leaked Apple developer software and found direct references to “AppleMesa” — Apple’s internal codename for Touch ID — tied to 2026 Apple Watch models. That’s a specific, traceable find, not a vague rumor.
Apple Watch has never had a fingerprint sensor. You either use a passcode or your iPhone to unlock it. That’s fine until your hands are sweaty mid-run, or you’re trying to pay for something quickly without fumbling with buttons.
Where will it sit?
- Option A – Side button
- Option B – Action button
- Option C – Digital Crown
Nobody knows yet. But wherever it lands, it’ll make Apple Pay faster, app logins more secure, and health data harder for someone else to access if they pick up your watch.
One thing that makes this leak more believable: PhoneArena reports Touch ID is also coming to the standard Apple Watch Series 12. Apple doesn’t build fingerprint infrastructure for one product — if it’s on Series 12, it’s real. See how it stacks up in our best smartwatches of 2026 roundup.
New Chip, Better Battery — But There’s a Trade-off Worth Knowing About
Supply chain sources say power efficiency is getting “a significant improvement” on Ultra 4. The likely reason is a new chip — probably an S11 or S12 — built on a newer manufacturing process. Same playbook Apple has run on iPhones for years.
The easy version of this story is just better battery life. Ultra 3 was the first Ultra to actually last longer than its predecessor — that took three generations. Continuing that trend would put it in real competition with Garmin and Suunto on endurance.
But here’s the more interesting possibility. Apple might not dump all that efficiency into runtime. Some of it could go toward fitting more sensors into a thinner case by shrinking the battery slightly — same battery life, smaller battery, more room for hardware.
It’s exactly the kind of engineering juggle Apple rarely talks about but does well. Whether they pull all three off — thinner, more sensors, same battery life — is what September will settle.
Ultra 3 vs Ultra 4: What the Leaks Actually Tell Us
| Feature | Ultra 3 | Ultra 4 (leaked) | How solid? |
|---|---|---|---|
| Health sensors | HR, ECG, SpO2, skin temp | Twice the sensor count | Strong |
| Touch ID | Not available | Expected (location TBD) | Strong |
| Design | Same as Ultra 1 and 2 | Slimmer, slightly bigger screen | Likely |
| Battery life | Better than Ultra 2 | Should improve again | Likely |
| Chip | S10 | S11 or S12 | Likely |
| Blood glucose | Not available | Not in 2026 | Strong |
| MicroLED display | Not available | Not in 2026 | Strong |
| Price | $799 | $799–$899 | Unclear |
| Launch | September 2025 | September 2026 | Strong |
Should You Wait for Ultra 4 or Just Buy Ultra 3 Now?
Wait if…
- You’re still on Ultra 1 or Ultra 2
- Health accuracy is why you buy a watch
- Touch ID is something you’ve actually wanted
- The Ultra feels too bulky for daily wear
- September isn’t a problem for you
Buy now if…
- You need something for summer plans
- Upgrading from a standard Series watch
- None of the leaked upgrades excite you
- There’s a strong Ultra 3 deal right now
- Five months is too long to wait
Ultra 3 is not going to feel embarrassingly old in September. Ultra 4 looks more like “better at the things Ultra already does” than a new direction.
But if health sensors and Touch ID are the whole reason you’re looking at a $799 watch, there’s a real argument to wait. More on how Ultra 4 stacks up against rivals in our best smartwatches guide.
Frequently asked questions
When is Apple Watch Ultra 4 coming out?
Apple hasn’t said anything officially, but every Ultra so far has launched at Apple’s fall event in early September. Ultra 1 was September 2022, Ultra 2 was September 2023, Ultra 3 was September 2025. Ultra 4 should follow the same pattern — announced early September 2026, available a week or two later.
What new health features will Ultra 4 have?
The main thing reported so far is a doubled sensor count. But don’t expect a long list of new health icons — the goal, according to supply chain sources, is to make existing tracking more accurate rather than add entirely new features. Heart rate, blood oxygen, and sleep tracking should all get more reliable. There’s also some speculation about proper blood pressure numbers (not just hypertension warnings), but nothing solid yet.
Is blood glucose monitoring coming to Apple Watch Ultra 4?
No. Multiple analysts are saying it won’t happen in 2026. Apple’s been working on it for years, but non-invasive glucose monitoring needs to be accurate enough to pass medical-grade regulatory requirements — and it reportedly isn’t there yet. This one might still be a couple of product cycles away.
How much will Apple Watch Ultra 4 cost?
Nothing official yet. Ultra 3 started at $799. Given the level of hardware changes rumored, Apple will likely keep it at $799 or bump it slightly to $849–$899. A big price jump would be surprising. We’ll update this once Apple announces.
Is it worth waiting for Ultra 4 or should I buy Ultra 3 now?
If you need a watch in the next few months, buy Ultra 3 — it’s excellent and won’t feel outdated overnight. If you’re on an older Ultra and health accuracy or Touch ID actually matter to you, waiting until September makes sense. Ultra 4 looks like a better version of the same thing, not a completely new product.
Better health, easier unlocking, finally a thinner case
Ultra 4 isn’t trying to reinvent the watch. No glucose sensor, no microLED, no wild new form factor. What it is doing is fixing the things that have bothered people about the Ultra: accuracy on health data, the lack of fingerprint unlock, and a case that some find too thick for everyday wear.
That’s not a bad pitch for a $799+ device. We’re five months out from Apple’s expected announcement. Check back here as more Apple Watch Ultra 4 leaks come in — we’ll keep this updated.
Sources: Digitimes, Macworld, PhoneArena, 9to5Mac. Everything here is based on leaks and supply chain reports — not anything Apple has said officially. Things can change before September.
