Apple Watch Ultra 4: 49mm titanium, S12 chip, 5G + satellite, $899 — full specs

Apple announced the Apple Watch Ultra 4 at the September 9, 2026 keynote, with on-sale date Friday, September 19, 2026. The Ultra 4 retains the 49mm aerospace-grade titanium case design from Ultra 3 but adds 5G RedCap + LTE, satellite Emergency SOS / Messages / Find My, an S12 chip, and 3,000 nits peak brightness — the brightest Apple Watch ever. US starting price: $899 (single GPS + Cellular configuration). It launches alongside Apple Watch Series 12 and Apple Watch SE 4.

Apple Watch Ultra 4 — quick specs

Spec	Apple Watch Ultra 4
Case material	49mm aerospace-grade titanium (Natural / Black titanium finishes); 54mm variant rumored for some markets
Display	1.93" Always-On LTPO3 OLED Retina, 422 × 514, 3,000 nits peak
Display glass	Sapphire crystal
Chip	Apple S12, 64-bit dual-core + 4-core Neural Engine
Storage	64GB
Battery	42 hours normal / 72 hours Low Power Mode / 20 hours GPS
Charging	USB-C fast charge — ~15 min for several hours of use
Cellular	5G RedCap + LTE
Wi-Fi	Wi-Fi 4 (802.11n)
Bluetooth	5.3
Ultra Wideband	Second-gen UWB chip
GPS	Dual-frequency (L1 + L5): GPS, GLONASS, Galileo, QZSS, BeiDou
Satellite	Emergency SOS via satellite, Messages via satellite, Find My via satellite
Water resistance	WR100 (100m), EN13319 recreational scuba to 40m, IP6X dust
Durability	MIL-STD 810H certified
Health sensors	ECG, Blood Oxygen (SpO₂), heart rate, skin temperature, sleep apnea detection
New health	Blood pressure / hypertension notifications (pending FDA approval)
Software	watchOS 27 — Workout Buddy, Waypoint watch face, Night Mode for Ultra faces
Starting price	$899 (US GPS + Cellular) / €899 (Europe) / ¥6,499 (China)

Apple Watch Ultra 4 vs Apple Watch Ultra 3 — what's new?

Five material changes vs Ultra 3 (2025):

1. Satellite connectivity — Emergency SOS, Messages, and Find My work over satellite when off-grid. Ultra 3 had none.
2. 5G RedCap + LTE cellular — Ultra 3 was LTE-only. 5G RedCap is lower-power 5G for wearables, not full 5G speed.
3. 3,000 nits peak brightness — Ultra 3 was 3,000 nits too, but Apple confirms Ultra 4 holds full brightness longer in sunlight.
4. S12 chip — Ultra 3 had S11. The S12 enables better on-device AI (Apple Intelligence on watchOS 27) and improved battery efficiency.
5. Blood pressure / hypertension notifications — pending FDA approval at launch, will roll out via watchOS update.

Plus the same general upgrades: Bluetooth 5.3 (vs 5.0 on Ultra 3), second-gen Ultra Wideband (for precise Find My and Handoff).

What is the Apple Watch Ultra 4's battery life?

Apple's official battery claims:

Use case	Battery life
Normal use (always-on display, heart rate, occasional workout)	42 hours
Low Power Mode (limits background sensing, disables always-on)	72 hours
Continuous GPS workout	20 hours
Outdoor workout with full GPS + cellular	~15 hours
Sleep tracking (overnight)	~10-12 hours per night

For comparison: Ultra 3 was 36 hours normal / 72 hours Low Power. The Ultra 4 gains 6 hours of normal-use battery life primarily through the S12 chip's efficiency and the 5G RedCap modem's lower power draw.

For multi-day backpacking trips, 72 hours of Low Power Mode covers 3 nights of sleep tracking with battery to spare. For most users, the Ultra 4 will get through 1.5-2 days on a single charge.

What is the Apple Watch Ultra 4's price in the US?

Configuration	US price	Europe	China
49mm Natural Titanium, GPS + Cellular	$899	€899	¥6,499
49mm Black Titanium, GPS + Cellular	$899	€899	¥6,499
Education discount (US)	n/a	n/a	¥5,799

Unlike Apple Watch Series 12, the Ultra 4 ships in GPS + Cellular only — there is no Wi-Fi-only configuration. Cellular activation is optional at the carrier level; you can use an Ultra 4 on Wi-Fi only without activating a cellular plan.

For trade-in: Apple offers up to $200 for an Ultra 3 in good condition, depending on configuration. Older Ultra 1 / Ultra 2 trades for $100-$150.

Is the Apple Watch Ultra 4 good for hiking and outdoor use?

Yes. The Ultra 4 is Apple's most outdoor-capable watch and competes directly with Garmin's Fenix and Enduro lines. Key outdoor features:

• Dual-frequency GPS (L1 + L5) — more accurate positioning in dense tree cover, canyons, and urban areas. Single-frequency GPS watches drift 10-30 meters in difficult conditions; dual-frequency typically stays within 3-5 meters.
• Satellite connectivity — Emergency SOS works off-grid in the US, Canada, EU, UK, Australia, Japan (no cellular needed). Useful for backcountry emergencies.
• 72-hour Low Power Mode — multi-day backpacking without recharging.
• MIL-STD 810H certified — passes military-grade thermal, shock, vibration, and altitude tests.
• WR100 / EN13319 / IP6X — 100m water resistance, recreational scuba to 40m, full dust resistance.
• Night Mode for Ultra faces — Modular Ultra, Wayfinder, and Orienteering faces turn red after sunset to preserve night vision.
• Backtrack — uses GPS to retrace your steps to a starting point. Useful if you lose the trail.

For thru-hikers and ultrarunners, the Ultra 4 is competitive with Garmin's top watches for navigation and battery life, with the trade-off of a less mature third-party app store (no Komoot, no detailed topographic maps without an iPhone).

Does the Apple Watch Ultra 4 work with iPhone 18?

Yes. The Apple Watch Ultra 4 requires an iPhone XS or later running iOS 26. Pairing with iPhone 18 is supported out of the box. The Ultra 4 also works with iPhone 11 / 12 / 13 / 14 / 15 / 16 / 17 / 18 series.

Key iPhone 18 + Ultra 4 features:

• Health data sync — All Ultra 4 health data (ECG, blood oxygen, sleep, blood pressure notifications) syncs to the iPhone 18 Health app over Bluetooth 5.3 and Wi-Fi.
• Camera Remote — use the Ultra 4 as a viewfinder and shutter for the iPhone 18 camera (works up to 30 feet via Wi-Fi).
• Unlock iPhone with Apple Watch — bypasses Face ID when wearing a mask (relevant during cold/flu season).
• Find My iPhone from Ultra 4 — pings your iPhone 18 even when in silent mode.
• Apple Pay on the watch — independent of the iPhone once set up.

For full ecosystem coverage, see our iPhone 18 pre-launch summary and our iPhone 18 Pro colors FAQ.

What colors does the Apple Watch Ultra 4 come in?

Two titanium finishes:

Finish	Look
Natural Titanium	Brushed silver-tone titanium (most popular, ships with Trail Loop or Ocean Band)
Black Titanium	DLC-coated dark titanium (more stealth look, ships with Black Ocean Band or Black Trail Loop)

The Ultra 4 case is titanium; the bands are interchangeable across the Apple Watch Ultra line (49mm bands fit both Ultra 3 and Ultra 4). Apple's first-party band options for Ultra 4 include Trail Loop, Alpine Loop, Ocean Band, and the new Black Titanium Ocean Band.

Hermès and Nike editions of Ultra 4 are expected in October 2026, similar to Ultra 3's launch pattern.

Should I buy Apple Watch Ultra 4 or wait?

Buy Ultra 4 if:

• You're upgrading from Apple Watch Series 8 or earlier (Ultra 4 is a major jump)
• You're upgrading from Apple Watch Ultra 1 (2022) or Ultra 2 (2023) — Ultra 4 has 5G, satellite, brighter display, S12 chip
• You're a hiker / backpacker / ultrarunner / diver who needs dual-frequency GPS and 72-hour battery
• You're a frequent international traveler and want satellite Emergency SOS outside the US

Wait or buy Ultra 3 instead if:

• You have Apple Watch Ultra 3 (2025) — Ultra 4 is incremental (satellite + 5G + chip improvement), not a major upgrade
• You want the Apple Watch X (10th anniversary redesign) rumored for September 2027 — that's a bigger jump
• You primarily use your Apple Watch for fitness tracking and notifications — Ultra 3 at $600-$700 refurbished covers this
• You want a thinner, lighter watch — Ultra 4 is heavy at ~62g (without band)

The Ultra 4 is a clear upgrade for Ultra 1 / Ultra 2 owners and Series 8-or-earlier buyers. For Ultra 3 owners, the upgrade is incremental and not essential unless you have a specific outdoor use case.

For buyers also shopping for iPhone 18, see our buy iPhone 18 FAQ for the full bundle decision framework.

Where can I buy the Apple Watch Ultra 4?

Apple Watch Ultra 4 is available at:

• Apple.com and Apple Store app — full configuration, with engraving option, free shipping, 14-day returns
• Apple Retail Stores — try on in person, walk out with stock on launch day (Sept 19)
• Best Buy, Target, Walmart — unlocked GPS + Cellular models, often with launch-day promotions
• Carriers (Verizon, AT&T, T-Mobile) — cellular-enabled models with carrier activation, often with monthly bill credits and trade-in deals

For the cheapest path, Apple Refurbished starts carrying Ultra 4 returns 3-4 months after launch at 15% off. Best Buy Open Box and Walmart clearance typically have $50-$100 discounts within 6 weeks of launch.

For AppleCare+ for Apple Watch (separate from iPhone AppleCare+), Apple offers $49/year or $4.99/month with two incidents of accidental damage per 12-month period.