Apple Watch Ultra 3 vs OnePlus Watch 2

Apple Watch Ultra 3

The Ultra 3 has the largest display Apple has ever put on a watch — a 422 x 512 wide-angle LTPO3 OLED at 3,000 nits, now with a 1Hz always-on refresh that lets the seconds tick. The flat sapphire-crystal front is tough but slightly reflective.

• The largest Apple Watch display ever — a 422 x 512 wide-angle OLED with slimmer bezels than the Ultra 2.
• 3,000-nit peak brightness — Tech It Easy notes that's a 1,000-nit jump over the Ultra 2, easily readable in any conditions.
• A new 1Hz always-on refresh lets the second hand tick while showing more data — and is more power-efficient.
• The flat sapphire-crystal front is durable but slightly reflective in some outdoor lighting.

OnePlus Watch 2

1.43-inch AMOLED, 466×466 resolution, sapphire crystal. Bright, sharp, with always-on support — the RTOS efficiency chip keeps the AOD battery cost low.

• 1.43-inch AMOLED, 466×466 resolution — bright, sharp, vibrant.
• Always-on display supported — the BES2700 RTOS chip handles AOD efficiently, keeping the battery cost low.
• Sapphire crystal protection — scratch-resistant, premium at the price.
• Readable in daylight — adequate brightness for outdoor workouts.
• The large 47mm case gives the AMOLED panel plenty of room — generous display real estate.

Apple Watch Ultra 3

The Ultra 3 carries Apple's full health suite — ECG, blood oxygen, skin temperature, Sleep Score, sleep apnea — plus the new hypertension notifications. Independent testing rates its heart-rate and sleep tracking among the best of any wearable.

• Heart-rate tracking is excellent — The Quantified Scientist rates it 'some of the best out there' and one of his most recommended watches for HR accuracy.
• Sleep tracking is class-leading — The Quantified Scientist measured REM-sleep agreement of about 83-84%, 'by far the best out of any device I've seen.'
• New hypertension notifications join ECG, blood oxygen, skin temperature and sleep apnea detection.
• A Sleep Score condenses the night into a single number, with full stage detail underneath.
• For high-intensity weightlifting, even the Ultra 3's strong sensor sees occasional dropouts — a chest strap is still better.

OnePlus Watch 2

Optical HR, SpO2, sleep tracking, stress monitoring. OnePlus Health app for analytics. Covers the everyday-wellness basics; less polished than Samsung Health or Fitbit.

• Optical HR + SpO2 — standard Wear OS sensor suite; reliable for steady-state, less accurate than a chest strap for intervals.
• Sleep tracking + stress monitoring — the OnePlus Health app covers everyday wellness insights.
• OnePlus Health app is less polished than Samsung Health or Fitbit — adequate basics, fewer AI-powered insights.
• No ECG on most regions — the Watch 2 lacks the clinical heart-rhythm feature found on Samsung/Apple/Pixel watches.
• Health tracking is adequate but not the Watch 2's selling point — battery and Wear OS are the headline features.

Apple Watch Ultra 3

The full watchOS workout app plus the new Workout Buddy AI coaching, dual-frequency GPS billed as the most accurate in a sports watch, and a customizable Action Button. It's a superb everyday fitness and running watch — though serious athletes still note Garmin's deeper analytics.

• Dual-frequency GPS — Apple bills it as the most accurate GPS in a sports watch, and reviewers found tracking reliable on runs and hikes.
• New Workout Buddy AI coaching delivers pacing and motivational feedback during workouts.
• GPS workout battery burn is light for the class — ZONEofTECH lost just 22% over a 5-hour outdoor walk without Low Power Mode.
• It's the best Apple Watch for running — but serious athletes still note Garmin's deeper training analytics and far longer endurance.
• The customizable Action Button gives quick one-press control over workouts and key functions.

OnePlus Watch 2

100+ workout modes, dual-frequency GPS, auto-detection. The long battery means multi-day workout tracking without recharge. 5 ATM water resistance.

• 100+ workout modes — broad activity coverage through the OnePlus Health app.
• Dual-frequency GPS — accurate tracking for running and outdoor activity, uncommon at the $299 price.
• The long battery enables multi-day workout tracking without recharge — a win for hikers and weekend warriors.
• Automatic workout detection — catches walks, runs, and cycling without manual start.
• 5 ATM water resistance — pool + open-water swim tracking supported.

Apple Watch Ultra 3

The Ultra 3 has the longest battery of any Apple Watch — 42 hours rated (up from the Ultra 2's 36), 72 hours in Low Power Mode. Real-world results routinely beat the claim, hitting 50-72 hours. Charging is rated 0-80% in 45 minutes, though some testers couldn't quite reach that.

• Rated 42 hours of normal use — up from the Ultra 2's 36 — and up to 72 hours in Low Power Mode.
• Real-world endurance beats the claim — ZONEofTECH averaged 50 hours over a month, with days hitting 56 hours including a workout.
• A head-to-head test had the Ultra 3 reach 55 hours before dying — about 7 hours longer than the Ultra 2 in the same test.
• Heavier use lands closer to the rating — Tech It Easy hit about 35 hours with studio work, sleep tracking and normal use.
• Charging is rated 0-80% in 45 minutes with 12 hours from a 15-minute top-up — though ZONEofTECH couldn't hit the 45-minute claim across multiple chargers.

OnePlus Watch 2

500mAh battery — up to 100 hours with the always-on display off, the headline feature. Dual-engine architecture is the breakthrough. 10-minute fast charge returns a full day.

• Up to 100 hours of battery with AOD off — The Verge: the dual-engine architecture 'will purportedly enable up to 100 hours of battery life.'
• Wired: 'The OnePlus Watch 2 offers Android users the best battery life from a smartwatch' — the standout achievement.
• Dual-engine architecture — a Snapdragon W5 performance chip + a BES2700 RTOS efficiency chip; the breakthrough behind the battery.
• 500mAh battery — paired with the dual-engine architecture, this is what nets the 100-hour figure.
• 10-minute fast charge returns a full day of use — class-leading charging speed.

Apple Watch Ultra 3

watchOS 26 on Apple's S10 chip, with the full App Store, Apple Pay and the deepest smartwatch ecosystem there is. Reviewers consistently rate it the best smartwatch software available — the one hard limit is that it's iPhone-only.

• watchOS 26 with the full App Store and Apple Pay — reviewers consistently rate it the deepest, most polished smartwatch ecosystem.
• Powered by Apple's S10 chip — fast and fluid, a step up from the Ultra 2's S9.
• The Modular Ultra watch face and night mode are owner favorites — and a reason some prefer the Ultra over a Series 11.
• It's iPhone-only — like every Apple Watch, the Ultra 3 does not work with Android.

OnePlus Watch 2

Wear OS 4 + the dual-engine architecture. OnePlus Health app, Google Wallet, full Play Store. Works with any Android phone. The Watch 2 returned OnePlus to Wear OS.

• Wear OS 4 — The Verge: the Watch 2 'will run on Google's Wear OS 4,' returning OnePlus to the platform after the original's RTOS-only OS.
• Dual-engine architecture — Wear OS runs on the Snapdragon W5; the BES2700 RTOS handles low-power tasks. OnePlus pioneered this approach.
• Full Google Play Store + Google Wallet — the complete Wear OS app ecosystem.
• OnePlus Health app — less polished than Samsung Health or Fitbit; adequate but not a strength.
• Works with any Android phone — not OnePlus-locked; cross-brand compatible.
• Android-only — no iOS compatibility.

Apple Watch Ultra 3

A 49mm grade-5 titanium case with a flat sapphire-crystal front and edge protection, MIL-STD-810H certified and rated to 100m water resistance. Long-term reviewers call durability one of the Ultra 3's strongest features — with the caveat that the black finish scuffs.

• Durability is one of the Ultra 3's strongest features — Tech It Easy was 'genuinely surprised' how well it holds up.
• Grade-5 titanium case with a flat sapphire-crystal front and raised edge protection — MIL-STD-810H certified.
• 100m water resistance — rugged enough for swimming, watersports and recreational diving.
• The black titanium coating scuffs more easily than the natural finish — the natural model hides wear better.

OnePlus Watch 2

Stainless-steel case + sapphire crystal + 5 ATM water resistance + IP68 + MIL-STD-810H. A genuinely rugged build for the price.

• Stainless-steel case — durable and premium at the $299.99 price.
• 5 ATM water resistance + IP68 — pool + open-water swim rated, dust-protected.
• MIL-STD-810H certified — drop, shock, and temperature resistance.
• Sapphire crystal display protection — highly scratch-resistant.

Apple Watch Ultra 3

The Ultra 3's headline upgrade: satellite communication — Emergency SOS, Messages and Find My via satellite, off-grid and subscription-free. It adds 5G cellular, dual-frequency GPS and precision iPhone finding.

• Satellite communication is the marquee feature — Emergency SOS, Messages and Find My via satellite work off-grid, with no subscription.
• DC Rainmaker found Apple's satellite messaging faster than Garmin or Google, and its non-geostationary approach can wait for a satellite to come into view.
• 5G cellular is built in — the Ultra is always a cellular model, so it works fully standalone without an iPhone nearby.
• Dual-frequency GPS plus precision iPhone finding and the full Apple Pay / NFC set round out connectivity.

OnePlus Watch 2

Dual-frequency GPS, NFC for Google Wallet, Bluetooth, Wi-Fi. No LTE — phone required for connectivity.

• Dual-frequency GPS — accurate tracking in urban canyons and dense tree cover, uncommon at the price.
• NFC for Google Wallet — contactless payments.
• Bluetooth + Wi-Fi — standard Wear OS connectivity stack.
• No LTE — phone required for connectivity; no standalone calls or texts.
• No satellite messaging — a feature reserved for higher tiers and later watches.

Apple Watch Ultra 3

At $799 — unchanged from the Ultra 2 — the Ultra 3 is the most expensive Apple Watch and an undeniable luxury. For most people a Series 11 covers the essentials at half the price; the Ultra earns its premium only if you genuinely want the biggest screen, longest battery, satellite safety and diving.

• $799 — unchanged from the Ultra 2, which reviewers credit Apple for holding steady.
• AppleInsider's review roundup: the Ultra 3 is an 'excellent and much-needed upgrade,' universally praised for battery and screen.
• For most people, TechRadar argues a Series 11 makes more sense — it covers the essentials for a fraction of the cost.
• vs Garmin: as a smartwatch the Ultra 3 wins on ecosystem, apps and ease of use; Garmin still wins on battery and deep training analytics.
• Best for: iPhone owners who want the ultimate Apple Watch — the biggest screen, longest battery, satellite safety and diving — and aren't fazed by the price.

OnePlus Watch 2

$299.99 launch. The Wear OS battery champion at launch. Competes with the Galaxy Watch 6 and the Pixel Watch 2 — and decisively beats both on battery.

• $299.99 launch price — strong value for stainless steel, sapphire crystal, dual-frequency GPS, and 100-hour battery.
• Android Authority: the Watch 2 is 'setting a new benchmark regarding battery life, innovative dual-OS tech, and, arguably, design.'
• vs Galaxy Watch 6: OnePlus wins decisively on battery (100 hours vs ~30); Samsung wins on ecosystem, app polish, and size options.
• Now superseded by the OnePlus Watch 3 — bigger 631mAh battery, titanium bezel, rotating crown (but a higher US price).
• Best for: Android users who want full Wear OS with multi-day battery no other Wear OS watch matched at launch — and don't mind a large 47mm watch.