Oppo Watch S vs Samsung Galaxy Watch 7

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.

Samsung Galaxy Watch 7

Super AMOLED with Sapphire Crystal, 3,000 nits peak brightness. Bright, sharp, readable outdoors. Always-on display supported.

• 3,000 nits peak brightness — a 50% jump over the Watch 6's 2,000 nits; excellent outdoor visibility.
• Super AMOLED with Sapphire Crystal — vibrant, sharp, scratch-resistant.
• Always-on display supported — informative without raising the wrist.
• Readable in direct sunlight — the 3,000-nit brightness handles outdoor workouts well.
• Display sits behind the raised glass profile — bright and clear, but the raised glass is the durability weak point.

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.

Samsung Galaxy Watch 7

BioActive sensor — optical HR, ECG, BIA body composition, skin temperature, plus the new AGEs Index biological-age metric. Sleep tracking with coaching.

• New AGEs Index — the Galaxy Watch 7 introduced advanced glycation end products tracking, estimating biological age via a skin scan.
• BioActive sensor — optical HR, ECG, BIA body composition, and skin temperature in one array.
• Sleep tracking with sleep coaching — detailed sleep stages plus a multi-week coaching program.
• ECG + BIA tied to a Samsung phone — the headline health features need Samsung Health on a Galaxy phone.
• Improved sensor accuracy — the new chip and updated BioActive sensor improve HR tracking over the Watch 6.

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.

Samsung Galaxy Watch 7

100+ workout modes, dual-frequency GPS (new), personalized HR zones, Energy Score. Samsung Health analytics. Solid everyday fitness; serious athletes still lean Garmin.

• Dual-frequency GPS — new for the standard Galaxy Watch; more accurate tracking in urban canyons and tree cover.
• 100+ workout modes — broad activity coverage through Samsung Health.
• Energy Score + Galaxy AI Wellness Tips — Samsung Health's AI-powered daily readiness and guidance.
• Personalized heart-rate zones + automatic workout detection — tailored training guidance.
• 5 ATM water resistance — pool + open-water swim tracking supported.

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.

Samsung Galaxy Watch 7

~30 hours typical use, 425mAh (44mm) / 300mAh (40mm). Battery drew criticism — many owners found it underwhelming. Wireless fast charging.

• Battery drew criticism — Engadget: 'many people were disappointed in its battery life.'
• ~30 hours typical use — similar to the Watch 6; the 44mm (425mAh) outlasts the 40mm (300mAh).
• The new 3nm Exynos W1000 chip improves efficiency — but not enough to fully address the battery complaints.
• Wireless fast charging — a quick top-up before bed enables overnight sleep tracking.
• The Galaxy Watch 8 later addressed the battery complaints with a larger cell — confirming the Watch 7's was a known weak point.

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.

Samsung Galaxy Watch 7

Wear OS 5 + One UI 6 Watch + Galaxy AI. Samsung Health, Samsung Pay + Google Wallet, Google Play Store. Best inside the Samsung phone ecosystem. Android-only.

• Wear OS 5 + One UI 6 Watch — a complete, polished Wear OS experience with the full Google Play Store.
• Galaxy AI features — Energy Score and AI Wellness Tips arrived on the Galaxy Watch 7.
• Samsung Health — the analytics backbone; AGEs Index and ECG are tied to a Samsung phone.
• Samsung Pay + Google Wallet — both contactless payment options supported.
• Android-only — no iOS compatibility; best on a Samsung Galaxy phone.

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.

Samsung Galaxy Watch 7

5 ATM (50m) water resistance + IP68 + MIL-STD-810H. Sapphire Crystal display + aluminum case. The raised glass profile is the durability weak point.

• 5 ATM + IP68 + MIL-STD-810H — the full Galaxy Watch durability ratings.
• Sapphire Crystal display protection — premium scratch resistance.
• Raised glass profile — Engadget flags this as the durability weak point: 'the raised glass screen can be easily damaged.'
• Aluminum case — durable and lightweight for everyday wear.

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.

Samsung Galaxy Watch 7

Dual-frequency GPS (new), optional LTE, NFC for Samsung Pay + Google Wallet, Bluetooth, Wi-Fi. No satellite messaging.

• Dual-frequency GPS — new for the standard Galaxy Watch 7; more accurate than the Watch 6's single-band GPS.
• Optional LTE — standalone calls, texts, and music streaming without the phone.
• NFC for Samsung Pay + Google Wallet — both contactless options.
• Bluetooth + Wi-Fi — full Wear OS connectivity stack.
• No satellite messaging — a feature reserved for higher tiers.

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.

Samsung Galaxy Watch 7

$299 (40mm) / $329 (44mm) launch. Now superseded by the Galaxy Watch 8 — a strong value if discounted. Competes with the Pixel Watch and (for iOS) the Apple Watch.

• $299 (40mm) / $329 (44mm) launch — fairly priced for a flagship Wear OS watch.
• Android Authority's standing recommendation: 'Samsung forgot about the Galaxy Watch 7, but I still think you should buy it' — a strong value pick.
• vs Galaxy Watch Ultra (same generation): the Ultra adds a rugged build, a larger battery, and a Quick Button for considerably more money.
• Now superseded by the Galaxy Watch 8 — which added a larger battery and the squircle redesign.
• Best for: Samsung phone owners who want the faster 3nm chip, dual-band GPS, and the AGEs Index — and find the overlooked Watch 7 discounted.