Apple Watch SE 3 vs Oppo Watch S

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.

Oppo Watch S

A 1.46-inch round AMOLED at 464 x 464 (317 ppi). It can hit a brilliant 3,000-nit peak — but only automatically, in Oppo's workout modes under strong sunlight. In everyday use it's capped at 600 nits, with a 1,500-nit high-brightness mode.

• 1.46-inch round AMOLED, 464 x 464 at 317 ppi — sharp and vibrant, with Splash Touch that keeps the screen usable when wet.
• The 3,000-nit peak is genuinely bright — but it only activates automatically in Oppo's workout modes when the watch detects strong sunlight.
• Everyday brightness is capped at 600 nits, with a 1,500-nit high-brightness mode — OPTechWithAskar notes that at the typical 600 nits 'this is just a normal good display.'
• In bright outdoor workouts the screen is excellent — you can read pace and heart rate without the wrist-tilt dance.

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.

Oppo Watch S

For a budget watch the Oppo Watch S carries a serious sensor array — an 8-channel optical heart-rate sensor, a 16-channel SpO2 sensor, ECG electrodes and a skin-temperature sensor — anchored by a 60-second check that reads around 14 health indicators at once. ECG availability depends on regional certification.

• A serious sensor array — an 8-channel optical heart-rate sensor, a 16-channel optical SpO2 sensor, ECG electrodes and a wrist-temperature sensor.
• A 60-second health check measures around 14 indicators — heart rate, ECG, SpO2, vascular elasticity and more — in a single reading.
• On-demand ECG via a side-button electrode takes about 30 seconds — Oppo's ECG is certified as a class 2 medical device in China and in around 30 countries.
• ECG availability is region-dependent — it may be disabled depending on local certification where you buy the watch.
• Day-to-day it does continuous heart-rate monitoring with high/low alerts, all-day SpO2 and wrist-temperature trends, plus sleep stages and a sleep score.

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.'

Oppo Watch S

The Oppo Watch S covers 100+ workout modes with built-in GPS and an AI sports coach that gauges readiness from HRV and recent training load. It's a capable everyday fitness tracker — though there's little independent accuracy testing to confirm how it stacks up.

• 100+ workout modes with built-in GPS, plus swim tracking thanks to the 5 ATM water rating.
• Oppo bills it as featuring an AI sports coach that analyzes readiness from HRV during sleep and your last 7 days of workouts.
• In workout modes the display ramps to its 3,000-nit peak — a real advantage for reading stats outdoors mid-exercise.
• Independent accuracy testing is limited — there is far less hands-on GPS and heart-rate validation than for flagship rivals.

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.

Oppo Watch S

The Oppo Watch S's strongest card. Oppo rates the 330mAh battery at up to 10 days maximum, 7 days typical and about 4 days with the always-on display on — and fast charging adds a full day in 10 minutes, with a complete charge in roughly 75-90 minutes.

• Oppo rates the battery at up to 10 days maximum, 7 days typical, and about 4 days with the always-on display enabled.
• The Tech Shed confirms about 7 days for an active user doing regular GPS workouts, with the headline 10-day figure reserved for lighter use.
• With the always-on display on, real-world life drops to around 4 days — still competitive with most smartwatch rivals.
• Fast charging is excellent — a 10-minute top-up returns a full day of use.
• A full 0-100% charge takes roughly 75-90 minutes via the magnetic pin charger.

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.

Oppo Watch S

The Oppo Watch S runs ColorOS Watch 7.1 on a power-efficient BES2800BP chip with 4GB of storage — not Wear OS. That choice is the reason the battery lasts a week, but it also means no Google Play app store and a simpler, more limited software experience.

• It runs ColorOS Watch 7.1 — a power-efficient platform that is the direct reason the battery lasts a week, not Wear OS.
• The trade-off is a simpler experience — there's no Google Play app store, so third-party app support is far more limited than on Wear OS.
• A power-efficient BES2800BP processor with 4GB of eMMC storage keeps the lightweight OS running smoothly.
• The companion health app works with both Android and iPhone — you don't need to own an Oppo phone to use the watch.

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.

Oppo Watch S

The Oppo Watch S is rated 5 ATM plus IP68 (and IP69), with Splash Touch that keeps the screen usable when wet. It's fine for swimming and everyday water — but Oppo specifically warns against hot showers, saunas and diving.

• 5 ATM water resistance plus IP68 and IP69 dust and water ratings — rated for swimming and everyday water exposure.
• Splash Touch keeps the touchscreen usable even when the watch is wet — handy after a swim or in the rain.
• Oppo specifically warns it's not meant for hot showers, saunas, hot springs or diving — and notes water resistance can reduce over time.

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.

Oppo Watch S

Built-in GPS, Bluetooth, Wi-Fi and NFC cover the everyday essentials. There's no cellular model, so the Oppo Watch S relies on a paired phone for connectivity.

• Built-in GPS, Bluetooth, Wi-Fi and NFC — the standard everyday connectivity set.
• There's no cellular model — the Oppo Watch S relies on a paired phone for connectivity and can't go fully standalone.
• NFC supports contactless payments where the service is available.

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.'

Oppo Watch S

The Oppo Watch S launched at around $399 NZD (roughly $230 USD) and is not officially sold in the US. For the price it's a strong value — week-long battery, ECG, a premium-feeling build — as long as you accept the simpler ColorOS platform.

• The Tech Shed's verdict: 'the Oppo Watch S is one of the best value smartwatches I've ever tested.'
• It launched at around $399 NZD — roughly $230 USD — undercutting flagship smartwatches significantly.
• It's a niche device — Oppo doesn't officially sell wearables in the US, so availability and support are limited there.
• FutureFive frames it well — it focuses on design, health tracking and battery life rather than software complexity.
• Best for: anyone who wants a featherweight, week-lasting health smartwatch at a budget price and doesn't need a deep app ecosystem.