Comparison · Fitness watches · Desk research
Apple Watch Ultra 4 vs Samsung Galaxy Watch Ultra2
Quick Answer
Apple Watch Ultra 4 (Newsroom 9 September 2026; tech specs accessed 19 September 2026) is a single 49mm Grade 5 titanium watch: S11, 64GB, Always-On LTPO3 at 3,000 nits, dual-frequency GPS, Action Button, satellite SOS / Messages / Find My, 100m / EN 13319 40m, Health Sensing System, and up to 50 hours normal / 84 hours Low Power / 45 hours Max Extended Workout, starting at $799, iPhone 11 or later with iOS 27. Samsung Galaxy Watch Ultra2 is.
The verdict
Apple Watch Ultra 4 or Samsung Galaxy Watch Ultra2 — quote the two manufacturer sheets.
Why: Two current rugged Ultras. Both names say Ultra — H1 uses full product names. Ultra 4 is one 49mm Grade 5 titanium SKU: S11, Health Sensing System, dual-frequency GPS, satellite SOS/Messages/Find My, EN 13319 40m, 50 / 84 / 45-hour table, $799 (Newsroom 9 September 2026), iPhone only. Galaxy Watch Ultra2 (Samsung US + US Newsroom, Unpacked 22 July 2026) is a 47mm titanium Wear OS 7 / One UI 9 Watch: Snapdragon Wear Elite (Qualcomm SDW6100 penta-core in Global Newsroom), 2GB + 64GB, 1.52-inch 498×498 Super AMOLED up to 5,000 nits, 800 mAh, up to 60 hours AOD on, Fast Charging 40% in around 30 minutes, L1+L5, 10 ATM / IP69K / MIL-STD-810H / EN13319, $699.99 US start. Android 13+ pairing.
Buy Apple Watch Ultra 4 if
You live on iPhone, want Apple’s satellite Messages / Find My / Emergency SOS stack, and Apple’s 50-hour / 45-hour Max Extended Workout table is enough.
Buy Samsung Galaxy Watch Ultra2 if
You pair an Android 13+ phone and want Samsung’s 47mm Wear OS Ultra: 800 mAh, 5,000-nit Super AMOLED claim, EN13319 + IP69K, and One UI 9 Watch.
Spec comparison
OEM rows only. Ultra 4 from apple.com/apple-watch-ultra-4/specs/. Galaxy Watch Ultra2 from Samsung US, US Newsroom, and the Global Newsroom spec table. Caption lock: 49mm Ultra 4 vs 47mm Ultra2.
| Spec | Apple Watch Ultra 4 | Galaxy Watch Ultra2 (47mm) |
|---|---|---|
| Year / window | Newsroom 9 September 2026 | Unpacked / pre-order 22 July 2026; US availability 7 August 2026 (US Newsroom) |
| Case | 49mm Grade 5 titanium | 47mm titanium (Silver / Gray on US) |
| Dimensions / weight | 49 × 44 × 12mm; 63.0g natural / 63.1g black (case only) | 47.4 × 47.1 × 10.7mm; 61.5g (Global Newsroom) |
| Display | Always-On LTPO3; 422×514; 326 ppi; 3,000 nits peak; 1 nit minimum; flat sapphire | 1.52-inch (38.5mm) 498×498 Super AMOLED; sapphire crystal; Always On; up to 5,000 nits (Samsung claim) |
| Chip / memory | S11; 64GB | Qualcomm SDW6100 penta-core 3nm / Snapdragon Wear Elite; 2GB + 64GB |
| OS | watchOS 27 | Wear OS 7; One UI 9 Watch |
| Battery | Up to 50h normal; 84h Low Power; 18h outdoor; 25h Extended; 45h Max Extended Workout | 800 mAh; up to 60h with AOD on (US FAQ). GPS-only hours: not on the US/Global excerpts we cited |
| Fast charge (OEM) | ~80% in about 45 minutes; 15 min ≈ 18 hours | Up to 40% in around 30 minutes (US Fast Charging) |
| GNSS | Precision dual-frequency GPS | L1+L5 Dual-Frequency GPS (Global Newsroom) |
| Water / dust / dive | 100m ISO 22810; EN 13319 recreational dive to 40m; IP6X; MIL-STD-810H subsection list | 10 ATM+; IP69K; MIL-STD-810H; EN13319 (Global Newsroom). US: dive-ready to 130 feet / Depth app |
| Adventure extras | Action Button; siren (Apple: audible to 180m / 600 feet); flashlight | Orange Quick Button; Night mode (US marketing) |
| Satellite | Emergency SOS, Messages, Find My via satellite | Not published as an Apple-class Messages/Find My satellite row on the excerpts we cited |
| Heart / health | Health Sensing System; ECG; Blood Oxygen (region limits) | Samsung BioActive Sensor (optical + electrical heart + BIA); temperature; ECG listed on US health stack — intended-use footnotes apply |
| Phone | iPhone 11 or later / SE 2+, iOS 27 | Android 13.0 or higher and >1.5GB RAM; GMS smartphone (Global Newsroom) |
| US start (dated) | $799 (Newsroom, 9 September 2026) | $699.99 (US Newsroom) |
Who each watch is for
Ultra 4 is the current Apple adventure watch. If the phone is an iPhone and you want satellite Messages / Find My plus Apple’s 50 / 84 / 45-hour table, this is the Apple side.
Galaxy Watch Ultra2 is the current Samsung adventure watch. The fork is Wear OS 7, an 800 mAh cell, Samsung’s 5,000-nit Super AMOLED claim, IP69K, and Android pairing — not a chip-benchmark war.
Ecosystem
Ultra 4 requires iPhone 11 or later (or iPhone SE 2nd generation or later) with iOS 27. Ultra2’s Global Newsroom pairing sentence is Android 13.0 or higher with more than 1.5GB of memory, after connecting to a GMS smartphone. Do not write “works the same on iPhone.”
Battery and nits — copy the OEM names
Apple: 50 / 84 / 18 / 25 / 45 hours; 3,000 nits peak. Samsung: 800 mAh; up to 60 hours AOD on; 5,000 nits. Those are manufacturer claims. This page does not convert them into a lab winner.
Dive and dust
Both list an EN13319 dive path. Ultra 4: 100m ISO + EN 13319 to 40m. Ultra2: 10 ATM+ / IP69K / EN13319; US copy says 130 feet with the Depth app. Do not invent a scuba certification either side did not print.
Price
$799 is Apple’s published US starting price for Ultra 4 on 9 September 2026. $699.99 is Samsung US Newsroom’s Ultra2 price. Date any street price.
Frequently asked questions
Are both of these ‘Ultra’ watches?
Yes, and the names collide. This slug is Apple Watch Ultra 4 versus Samsung Galaxy Watch Ultra2 (Samsung’s 2026 styling has no space before 2). Do not swap in first-gen Galaxy Watch Ultra.
What size is Galaxy Watch Ultra2?
Samsung Global Newsroom and the US buy path lock 47mm (47.4 × 47.1 × 10.7mm, 61.5g). Ultra 4 is 49mm only (49 × 44 × 12mm).
What battery hours does Samsung publish?
Samsung US FAQ: 800 mAh; up to 60 hours of usage with AOD on; Fast Charging 40% in around 30 minutes. Global Newsroom prints 800 mAh and does not print a GPS-only hour row on that table. Ultra 4: 50 / 84 / 18 / 25 / 45 hours.
Does Ultra2 run Wear OS?
Yes. Global Newsroom: Wear OS powered by Samsung (Wear OS 7) and One UI 9 Watch. Pairing: Android 13.0 or higher with more than 1.5GB of memory; activation after a GMS smartphone. Ultra 4 is watchOS 27 / iPhone only.