Apple Watch SE 3 vs OnePlus Watch 3

Apple Watch SE 3

The big SE 3 story: an always-on display, a first for the SE line. The LTPO OLED panel peaks at 1,000 nits — bright enough for everyday use, but half the Series 11's 2,000 nits and a third of the Ultra 3's 3,000.

• Always-on display arrives on the SE for the first time — Origin Disc: 'that alone is a huge upgrade for the SE line.'
• LTPO OLED panel peaks at 1,000 nits — fine for everyday use but dimmer than rivals.
• 1,000 nits is half the Series 11's 2,000 and a third of the Ultra 3's 3,000 — the SE 3's display is its clearest hardware compromise.
• Always-on is a personal-preference feature — some owners prefer to leave it off for extra battery life.

OnePlus Watch 3

A 1.5-inch LTPO AMOLED at 466 x 466, now peaking at 2,200 nits — a clear brightness upgrade over the Watch 2 that makes it noticeably more readable outdoors. Sapphire crystal protects it.

• 1.5-inch LTPO AMOLED at 2,200 nits — The Verge notes it's larger and brighter than the Watch 2, with smaller bezels.
• The 2,200-nit brightness is noticeably more readable outdoors in direct sunlight than the Watch 2's panel.
• A new video watch face lets you upload your own clips — a fun, distinctive touch.
• Sapphire crystal protection — premium scratch resistance for the price.

Apple Watch SE 3

Heart rate is the SE 3's standout — testers rate it among the best wrist sensors available. Apple adds nightly wrist-temperature tracking and sleep apnea notifications. But ECG, blood oxygen (SpO2), and the Series 11's new hypertension alerts are all absent, and sleep-stage data underreports deep sleep.

• Heart-rate accuracy is excellent — Mike O'Brien tested it against a Polar H10 ECG chest strap and found it had the second-highest correlation of the watches tested, behind only the Pixel Watch 3.
• The Quantified Scientist rates the Apple Watch's optical heart-rate sensor as the best wrist HR monitor he has tested — the SE 3 inherits it.
• No ECG sensor — confirmed missing; if heart-rhythm ECG matters to you, you need the Series 11 or Ultra 3.
• No blood-oxygen (SpO2) sensor and no hypertension notifications — the Series 11's headline health features are absent.
• Apple adds nightly wrist-temperature tracking — the watch samples skin temperature roughly every 5 seconds overnight.
• Sleep apnea notifications are now included — a useful screening feature given how many people have undiagnosed sleep apnea.
• Sleep-stage tracking underreports deep sleep — Mike O'Brien recorded 45-55 minutes of deep sleep per night while reference devices showed 1.5-2.5 hours.

OnePlus Watch 3

The OnePlus Watch 3 covers the basics — heart rate, SpO2, skin temperature, sleep, stress — plus a handy 60-second multi-metric Health Check. But health-tracking depth lags Google and Samsung, accuracy is middling, and the ECG hardware is disabled in the US for lack of FDA clearance.

• A 60-second Health Check captures heart rate, SpO2, ECG-style and arterial-stiffness metrics in one quick reading.
• No ECG in the US — the hardware is built in, but without FDA clearance the ECG Analyzer is disabled for US buyers.
• Heart-rate accuracy is improved over the Watch 2 but still imperfect — The Quantified Scientist found it picks up peaks reasonably and was positively surprised by outdoor cycling.
• Sleep-stage tracking is weak — The Quantified Scientist measured roughly 60% deep-sleep agreement and only ~36% REM agreement.
• Health-tracking depth lags rivals — OnePlus's OHealth app is functional but behind Google's Fitbit and Samsung Health.

Apple Watch SE 3

The full watchOS workout app, activity rings, automatic workout detection, and built-in GPS. Apple rates about 7 hours of GPS workout tracking. It is not a dedicated running watch — no dual-frequency GPS — but for everyday fitness it covers the essentials well.

• Full watchOS workout app, activity rings and automatic workout detection — everything expected of an Apple Watch.
• Built-in GPS rated for about 7 hours of workout tracking — DesFit found real-world endurance well beyond that claim.
• The Quantified Scientist rates the Apple Watch SE as a pretty good GPS tracker — accurate enough for everyday runs and rides.
• Not a dedicated running watch — no dual-frequency GPS and no deep training analytics; serious runners still look to Garmin or the Ultra 3.
• Crash detection, fall detection and Emergency SOS carry over — Mike O'Brien notes fall detection is 'among the best in the industry.'

OnePlus Watch 3

100+ workout modes with dual-frequency GPS and automatic detection. It's a capable everyday fitness watch — GPS accuracy is decent if not class-leading — and the huge battery means it can track multi-day adventures without an anxious eye on the charger.

• Dual-frequency (L1 + L5) GPS — Matt LeGrand found running accuracy decent, if not quite at the level of an Apple Watch Ultra.
• 100+ workout modes, including skiing with slope-angle tracking and swimming thanks to the 5 ATM rating.
• The huge battery is a real fitness advantage — a multi-day snowboarding trip with constant tracking still left the watch going strong.
• It's a capable everyday fitness watch, but serious athletes still note Garmin's deeper training analytics.
• 5 ATM water resistance covers pool and open-water swimming.

Apple Watch SE 3

Apple still rates the SE 3 at 18 hours of all-day battery, and that conservative number holds — but independent endurance tests stretched it to 37-41 hours of continuous wear depending on size. The genuine upgrade is fast charging: roughly 0-80% in 45 minutes, with a 15-minute top-up buying about 8 hours. A low-power mode reaches ~32 hours.

• Fast charging is new to the SE line — about 0-80% in 45 minutes, matching Apple's claim in testing.
• A 15-minute top-up buys roughly 8 hours of use — enough to rescue a sleep-tracking night.
• Endurance test: the 44mm SE 3 ran ~41 hours of continuous wear and the 40mm ~37-38 hours — far beyond Apple's conservative 18-hour rating.
• Still rated 18 hours — fast charging helps, but daily charging is the reality, and you may need a pre-bed top-up for sleep tracking.
• A low-power mode extends life to roughly 32 hours on a single charge.

OnePlus Watch 3

The OnePlus Watch 3's defining strength. A 631mAh silicon-carbon battery and a dual-chip architecture deliver a genuine 5 days of full smartwatch use — unmatched in Wear OS — and up to 16 days in power-saver mode. Fast charging adds a full day in about 10 minutes.

• A genuine 5 days of full smartwatch use — Mark Ellis confirms the 5-day claim is 'pretty much bang on.'
• OnePlus's dual-chip architecture — a Wear OS chip plus a low-power RTOS chip — is the secret to the endurance, and nothing else in Wear OS matches it.
• Heavy use brings it down — a multi-day snowboarding trip with constant tracking landed closer to 3-4 days.
• Power-saver mode pushes battery to up to 16 days while still delivering notifications and tracking.
• Fast charging is excellent — about 10 minutes on the dock returns a full day of use, and a full charge takes roughly 45 minutes.

Apple Watch SE 3

watchOS 26 on Apple's S10 chip — identical core performance to the Series 11 and Ultra 3, including double-tap and wrist-flick gestures. 64GB of storage. Apple Pay, the App Store and the full ecosystem are all here. The one hard limit: it works only with an iPhone.

• Same S10 chip as the Series 11 and Ultra 3 — TheJuan&Only confirms identical core performance across the lineup.
• Supports the S10-enabled gestures — double-tap and wrist-flick to dismiss notifications.
• 64GB of storage and the full App Store, Apple Pay, Find My and Siri — nothing core is cut from the experience.
• iPhone-only — like every Apple Watch, the SE 3 does not work with Android phones.
• TechRadar: it has 'the same fantastic chipset as the Ultra 3 and Series 11' — the SE 3 doesn't feel slow or cut-down in daily use.

OnePlus Watch 3

Full Wear OS 5 with Google's app ecosystem and Google Wallet, layered with OnePlus's interface and the OHealth companion app. Performance is fast, though there's occasional lag — and the OHealth app is the weak link versus Google and Samsung.

• Full Wear OS 5 with the Google Play app ecosystem and Google Wallet — the complete Android smartwatch experience.
• Performance is fast and fluid — Android Police reports 'absolutely no problem' with everyday navigation.
• The OHealth companion app is the weak link — owners switching from Samsung find it behind the Wear and Samsung Health apps.
• Occasional system lag — some owners notice stutters when quickly exiting the always-on display into an app.
• It's Android-only — like every Wear OS watch, the OnePlus Watch 3 does not pair with an iPhone.

Apple Watch SE 3

Crack-resistant Ion-X glass, now rated about 4x tougher than the SE 2, over an aluminum case. Water resistance is 50m (5 ATM) — fine for pool and open-water swimming.

• 50m (5 ATM) water resistance — rated for pool and open-water swimming.
• Crack-resistant Ion-X glass, now about 4x more crack- and scratch-resistant than the SE 2.
• DesFit notes Apple Watch aluminum models hold up well in practice — he has scratched only one across many Apple Watches going back to the Series 3.
• Not as scratch-hardened as the Series 11's ceramic-coated glass or the Ultra 3's sapphire — fine for everyday wear, not adventure abuse.

OnePlus Watch 3

A stainless-steel case with a titanium bezel and sapphire-crystal glass, rated 5 ATM and IP68. It's a genuinely rugged build for the price — one reviewer put it through a full multi-day snowboarding trip without issue.

• Stainless-steel case with a titanium bezel and sapphire-crystal glass — a genuinely premium, durable build.
• 5 ATM water resistance plus IP68 — fine for swimming, showering and rain.
• It held up to a full multi-day snowboarding stress test without issue — durable enough for outdoor adventures.

Apple Watch SE 3

Built-in GPS, Apple Pay via NFC, Bluetooth and Wi-Fi. An optional cellular model adds standalone connectivity for about $50 more. The SE 3 lacks the Series 11's second-generation ultra-wideband chip, so it can only ping a lost iPhone rather than guide you to it.

• Built-in GPS, Apple Pay (NFC), Bluetooth and Wi-Fi — the standard Apple Watch connectivity set.
• An optional cellular model adds standalone connectivity for roughly $50 more — useful for leaving the phone behind.
• No second-generation ultra-wideband chip — the SE 3 can only beep a lost iPhone, not precision-guide you to it like the Series 11.

OnePlus Watch 3

Dual-frequency GPS, Bluetooth, Wi-Fi and Google Wallet via NFC. The notable omission is cellular — there is no LTE model, so the OnePlus Watch 3 can't operate fully standalone.

• Dual-frequency (L1 + L5) GPS, Bluetooth, Wi-Fi and Google Wallet — the standard Wear OS connectivity set.
• No LTE model — the OnePlus Watch 3 is Bluetooth-only, so it can't go fully standalone away from a phone.
• Google Wallet handles contactless payments, and notifications and calls work well over Bluetooth.

Apple Watch SE 3

At a held-steady $249, the SE 3 is the cheapest way into a current Apple Watch and the obvious pick for most iPhone owners. The $399 Series 11 adds ECG, blood oxygen, hypertension alerts, a brighter screen and 24-hour battery; the $799 Ultra 3 adds far more. For the majority, the SE 3's gaps will not be felt.

• TechRadar's verdict: the SE 3 'might be the best-value Apple Watch ever made.'
• Mike O'Brien calls it 'the best Apple Watch for most people' — major improvements with very few noticeable differences from the $400 Series 11.
• Gizmodo: 'The Apple Watch SE 3 is a stupidly good value for $250.'
• Step up to the $399 Series 11 for ECG, blood oxygen, hypertension alerts, a 2,000-nit screen and 24-hour battery — worth it only if you actually need those.
• Best for: first-time Apple Watch buyers and anyone who wants the core experience for the lowest price — Tom's Guide names the SE 3 'the best value, great for first-time users.'

OnePlus Watch 3

The OnePlus Watch 3 launched at $329.99, then took a confusing hike to $499.99, and now typically sells around $349.99. At its sale price it's a standout value; at full list it's harder to justify. It beats the Pixel Watch 4 and Galaxy Watch 8 decisively on battery, but trails them on software polish and health depth.

• CNET's verdict: the OnePlus Watch 3 has 'the best battery life of any Android smartwatch.'
• The pricing is confusing — it launched at $329.99, then jumped to $499.99; Digital Trends openly asks whether it's still worth buying at the higher price.
• Two months on, TechRadar says OnePlus fixed its biggest issue via updates and 'now I can recommend it to everybody.'
• vs the Pixel Watch 4 / Galaxy Watch 8: the OnePlus wins decisively on battery and build for the price; the others win on software polish and health-tracking depth.
• Best for: Android users who want the longest-lasting Wear OS watch in a premium build — and don't need ECG or a small case.