Google Pixel Watch 4 vs Oppo Watch S

Google Pixel Watch 4

The new Actua 360 domed OLED is the visual headline — 50% brighter at a 3,000-nit peak, 10% larger and with 16% smaller bezels than the Pixel Watch 3. It's on par with the Apple Watch Ultra 3 and Galaxy Watch 8 for brightness.

• The Actua 360 display peaks at 3,000 nits — 50% brighter than the Pixel Watch 3 and on par with the Apple Watch Ultra 3.
• The curved, domed display creates a near-180° view — CNET says it 'bubbles up in a seamless curve.'
• The display is 10% larger with 16% smaller bezels — content no longer falls off the rounded edges.
• It still uses Gorilla Glass rather than sapphire — Lexy Savvides wishes Google offered a tougher-glass option.

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.

Google Pixel Watch 4

Fitbit-powered tracking with one of the best heart-rate sensors on Android, plus ECG, SpO2, skin temperature and stress sensing. Sleep tracking is detailed — Google claims it's its most accurate yet — but the best insights and the new AI coach sit behind Fitbit Premium.

• Heart-rate tracking is excellent — the sensor carries over from the Pixel Watch 3, which The Quantified Scientist rated as essentially spot-on against an ECG chest strap.
• Full sensor suite — ECG and irregular-rhythm detection, SpO2, skin temperature and electrodermal stress sensing.
• Sleep tracking is detailed and, per Google, ~18% more accurate — with a redesigned algorithm aimed at irregular sleepers and insomnia.
• The new AI health coach and the deepest sleep and stress data require a Fitbit Premium subscription ($10/month after a trial).
• For the best heart-rate tracking during weightlifting, The Quantified Scientist still recommends a chest strap — a universal wrist-optical limitation.

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.

Google Pixel Watch 4

Fitbit-powered fitness tracking with dual-frequency GPS, automatic workout detection and AI-powered activity recognition. It's a strong everyday fitness watch, though GPS workouts are heavy on the battery.

• Dual-frequency GPS — new to the Pixel Watch 4, for better accuracy on runs and outdoor rides.
• Automatic workout detection and AI-powered activity recognition — workouts start tracking on their own after about 10 minutes.
• Fitbit's training tools — daily readiness, dynamic workout suggestions — help build consistent habits, though the richest data is Premium-gated.
• GPS workouts drain the battery quickly — Chase the Summit measured 9-10% per hour, capping GPS runtime near 10 hours.
• 5 ATM water resistance with swim tracking covers pool and open-water swimming.

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.

Google Pixel Watch 4

Google rates the 41mm at 30 hours and the 45mm at 40 hours with the always-on display — and independent testing comfortably beats that, hitting 48-64 hours. The standout is charging speed: 0-50% in roughly 15 minutes.

• Rated 30 hours (41mm) and 40 hours (45mm) with the always-on display — about 25% longer than the Pixel Watch 3.
• Endurance testing beats the claim — The Product Reviewer ran the 45mm to ~64 hours and the 41mm to ~59 hours of continuous wear.
• Lexy Savvides regularly got 48-50 hours on the 45mm — comfortably past Google's 40-hour rating.
• Fast charging is the standout — 0-50% in about 15 minutes, and a full charge in roughly 45-60 minutes depending on size.
• Battery saver mode extends life to 48-72 hours depending on the model.

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.

Google Pixel Watch 4

Wear OS 6 with Google's Material 3 Expressive design and Gemini built into the wrist. It's the most polished Wear OS experience available. The two recurring gripes: a Fitbit Premium paywall and only three years of guaranteed updates.

• Wear OS 6 with Material 3 Expressive — Trusted Reviews calls the Search, Gemini and Assistant integration 'the real shiny gem.'
• Gemini on the wrist — raise-to-talk lets you ask questions and set reminders by voice, and reviewers found it fast for a watch AI.
• Runs the Snapdragon W5 Gen 2 — fast and fluid in daily use, with only the occasional slight interface lag.
• Google commits to only 3 years of software updates — one year less than Samsung's Galaxy Watch.
• It's Android-only — like every Wear OS watch, the Pixel Watch 4 does not pair with an iPhone.

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.

Google Pixel Watch 4

Rated 5 ATM (50m) plus IP68 — fine for swimming, showering and rain. The big durability story is repairability: thanks to the redesigned, screw-held housing, a damaged screen or worn battery no longer means e-waste.

• 5 ATM (50m) water resistance plus an IP68 dust and water rating — fine for swimming, showering and rain.
• The redesigned housing makes the watch genuinely repairable — Google plans to sell replacement screens and batteries, and procedures take 10-15 minutes.
• Long-term owners report the aluminum casing and domed glass holding up well — though it lacks a rugged build for hard labor or adventure.
• Some owners still worry about scratching the domed Gorilla Glass and consider a screen protector.

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.

Google Pixel Watch 4

Dual-frequency GPS, Bluetooth, Wi-Fi and Google Wallet via NFC. An optional LTE model adds standalone connectivity — and unlocks the Pixel Watch 4's headline new feature, satellite SOS for emergencies out of cell range.

• Satellite SOS is the headline new feature — emergency messaging out of cell range, available only on the LTE model since it uses the cellular antennas.
• Dual-frequency GPS, Bluetooth and Wi-Fi — plus Google Wallet for contactless payments.
• The optional LTE model adds standalone connectivity for about $50-$100 more, useful for leaving the phone behind.

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.

Google Pixel Watch 4

At $349.99 (41mm) and $399.99 (45mm), the Pixel Watch 4 holds the Pixel Watch 3's pricing and is widely discounted within months. For Android users it's the watch to beat — the Galaxy Watch counters with longer update support, and Garmin still wins on battery.

• Wired's verdict: the Pixel Watch 4 'remains the best option for most Android owners, not least because it's finally repairable.'
• $349.99 (41mm) and $399.99 (45mm) — the same pricing as the Pixel Watch 3, and frequently discounted by $50-$60 within months.
• Trusted Reviews calls it 'undoubtedly the best Google wearable to date,' a package most people will enjoy.
• vs Galaxy Watch / Garmin: the Galaxy Watch counters with 4 years of updates and the OnePlus Watch with far longer battery — but reviewers still rate the Pixel Watch 4 the most polished Android pick.
• Best for: anyone on an Android phone — especially a Pixel — who wants the best-looking, best-tracking, most polished smartwatch they can pair with it.

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.