Samsung Galaxy Watch Ultra vs Apple Watch Ultra 3: GPS Worth $150?

Both watches sit at the top of their ecosystems and chase the same rugged-titanium buyer, but they’re not interchangeable. The platform you already use makes the call before any spec sheet does — and from there, the differences in GPS, screen, and battery endurance push the decision in opposite directions.

Key Differences

• Ecosystem lock-in: Galaxy Watch Ultra requires an Android phone; Apple Watch Ultra 3 requires an iPhone. There is no crossover.
• Price: Galaxy Watch Ultra launched at $649; Apple Watch Ultra 3 launched at $799 — a $150 gap.
• GPS: Both run multi-band, but Apple specifies dual-frequency L1 and L5 — the cleanest fix in the category for downtown routes.
• Display: Apple’s 1.98-inch LTPO3 OLED is meaningfully larger than Samsung’s 1.47-inch Super AMOLED.
• Storage: Apple ships 64GB; Samsung ships 16GB. That matters for offline music and on-watch apps.
• Health sensors: Samsung adds bioelectrical impedance (BIA) for body composition. Apple does not.
• Battery (per Samsung’s spec sheet): Samsung claims 1,440 hours (60 days) in low-power smartwatch mode versus Apple’s 42 hours (1.8 days). Real-world typical use on Galaxy Watch Ultra is shorter, but the headline endurance ceiling still favors Samsung.

Deep Dive Comparison

Design & Comfort

Both watches use titanium cases and land within a gram of each other — Samsung at 60.5g, Apple at 61.6g. Samsung’s Grade 4 titanium and 47mm case run slightly smaller on the wrist than Apple’s 49mm Grade 5 build. Water protection is a wash for daily use: Samsung carries 10 ATM plus IP68; Apple is rated to 100 meters under ISO 22810. Both have depth gauges, mics, and speakers, so swimming, snorkeling, and on-wrist calls are covered either way.

Battery Life

This is where Samsung’s spec sheet pulls hard ahead — at least on paper. Samsung quotes 1,440 hours (60 days) of smartwatch use in its lowest-power mode and 48 hours (2 days) with GPS active. Apple lists 42 hours (1.8 days) of normal use and 20 hours (0.8 days) of GPS workout time. In practice, Galaxy Watch Ultra users report multi-day endurance under typical-use settings, while Apple’s number is closer to honest day-to-day reality. If you hate charging, Samsung wins. If you want predictable end-of-day battery and don’t mind a nightly top-up, Apple is fine.

Health & Fitness Features

Both watches cover the modern health stack: optical heart rate, ECG, SpO2, skin temperature, accelerometer, gyroscope, and barometer. Samsung’s BioActive sensor adds bioelectrical impedance analysis for body composition readings — a feature Apple still doesn’t ship. Apple counters with dual-frequency L1 and L5 GPS, which produces noticeably cleaner traces in dense cities or under tree cover than Samsung’s multi-band setup. For long-distance runners, cyclists, and trail athletes who care about accurate pace data, that GPS difference is the single biggest fitness spec on this page.

Smart Features

Both watches have NFC payments, LTE options, mics, and speakers. Apple’s 64GB storage versus Samsung’s 16GB is the headline gap — four times the room for offline playlists, podcasts, and apps. Apple’s third-party app catalog on watchOS is also deeper than Wear OS, particularly for fitness platforms. Notification handling on each watch is excellent on its native platform and clumsy or impossible on the other.

Price & Value

Samsung launched at $649 and Apple at $799. The $150 gap matters less than it looks once you factor in storage, GPS quality, and Apple’s typically stronger long-term software support window. If you’re an Android user, Galaxy Watch Ultra is a strong value play. If you’re an iPhone user, the comparison is moot — Apple Watch Ultra 3 is your only choice in this tier.

Technical Specs

Spec	Samsung Galaxy Watch Ultra	Apple Watch Ultra 3
Launch Price	$649	$799
Release Date	July 2024	September 2025
Case Size	47mm	49mm
Weight	60.5g	61.6g
Case Material	Titanium Grade 4	Titanium Grade 5
Water Rating	10 ATM + IP68	100 meters (ISO 22810)
Display	1.47-inch Super AMOLED, 480 x 480	1.98-inch LTPO3 OLED, 422 x 514
Battery (Smartwatch)	1,440 hours (60 days, low-power)	42 hours (1.8 days)
Battery (GPS)	48 hours (2 days)	20 hours (0.8 days)
GPS	Multi-band	Dual-frequency L1 and L5
Connectivity	Bluetooth 5.3, Wi-Fi, NFC, LTE	LTE, Wi-Fi 4, Bluetooth 5.3
Storage	16GB	64GB
Sensors	HR, ECG, BIA, SpO2, skin temp, depth, barometer, gyroscope, accelerometer	Electrical heart, optical heart (Gen 3), blood oxygen, temperature, depth, water temp, altimeter, gyroscope, accelerometer
Mic & Speaker	Yes	Yes
NFC Payments	Yes	Yes

The Verdict

Buy the Apple Watch Ultra 3 if you carry an iPhone. The bigger 1.98-inch display, dual-frequency L1/L5 GPS, 64GB of storage, and watchOS app library make it the most complete sports-and-life smartwatch Apple has ever shipped — and at $799 it’s priced where it belongs.

Buy the Samsung Galaxy Watch Ultra if you’re on Android. At $649 it’s the cheaper watch, the body composition reading is a real differentiator, and the low-power battery ceiling is genuinely longer than anything Apple offers. The smaller screen and weaker app ecosystem are the trade-offs you accept to stay on Wear OS.

Cross-shopping the two only makes sense if you’re also considering switching phone platforms. If you aren’t, your phone has already picked the watch.

Frequently Asked Questions

Which watch is better overall?

Apple Watch Ultra 3 is the more capable hardware — bigger screen, sharper GPS, four times the storage. But “better” depends entirely on your phone. On iPhone, Apple wins; on Android, Galaxy Watch Ultra is the only one of the two you can actually use.

Can I use the Galaxy Watch Ultra with an iPhone or the Apple Watch Ultra 3 with Android?

No to both. Galaxy Watch Ultra requires an Android phone for setup and full features. Apple Watch Ultra 3 requires an iPhone. There is no workaround, so the watch decision is downstream of the phone decision.

Is the Apple Watch Ultra 3 worth $150 more than the Galaxy Watch Ultra?

For an iPhone user, yes — the dual-frequency GPS, 1.98-inch display, and 64GB storage are real upgrades over the Galaxy on its best day. For an Android user it’s irrelevant because the Apple watch won’t pair with your phone. The $150 question only matters in a hypothetical where ecosystems didn’t exist.

Which has the longer battery life in real-world use?

Samsung, by a clear margin. Even setting aside the optimistic 60-day low-power figure, Galaxy Watch Ultra typically delivers multi-day endurance in normal use, while Apple’s 1.8-day rating is closer to a daily-charge watch. Endurance athletes and travelers tilt toward Samsung; everyone else can live with Apple’s nightly top-up.

Which is better for serious runners and outdoor athletes?

Apple Watch Ultra 3, on GPS quality alone — dual-frequency L1 and L5 produces cleaner traces in cities and under canopy than Samsung’s multi-band implementation. Samsung still tracks well and adds body composition, but for pace accuracy on real routes, Apple is the stronger sports tool.