
OnePlus
The Wear OS battery king

Samsung
Samsung's deepest health software — held back by battery
OnePlus Watch 3
OnePlus Watch 3
OnePlus Watch 3
A premium, substantial 46mm watch — stainless steel with a titanium bezel and sapphire-crystal glass, with a new rotating crown. It looks and feels high-end, but it's big and heavy: noticeably larger than rivals and not suited to smaller wrists.
TechTalkTown may earn a commission from purchases made through links below. As an Amazon Associate I earn from qualifying purchases. This does not influence our reviews. Learn more.
Samsung Galaxy Watch 8
Samsung Galaxy Watch 8
Samsung Galaxy Watch 8
The Galaxy Watch 8 adopts the Galaxy Watch Ultra's cushion 'squircle' shape — a polarizing redesign — in armor aluminum with sapphire crystal. Two sizes, 40mm and 44mm. A new Dynamic Lug system makes bands easy to swap, Apple Watch-style.
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.
Samsung Galaxy Watch 8
A Super AMOLED panel — 1.34-inch on the 40mm, 1.5-inch on the 44mm — that now peaks at a brilliant 3,000 nits, a big jump over the Galaxy Watch 7's 2,000. Sapphire crystal protects it, and there's an always-on mode.
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.
Samsung Galaxy Watch 8
This is the Galaxy Watch 8's strongest card — the deepest health suite of any Wear OS watch: ECG, blood pressure, body composition, SpO2, skin temperature, plus new metrics like the Antioxidant Index, Vascular Load and AGEs Index. Heart-rate accuracy during exercise is the weak spot.
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.
Samsung Galaxy Watch 8
Samsung Health workout tracking with dual-frequency GPS, automatic exercise detection and a new adaptive Running Coach. GPS distance is the best of any Samsung watch yet, though still behind a dedicated sports watch — and GPS workouts drain the battery hard.
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.
Samsung Galaxy Watch 8
The Galaxy Watch 8's clearest weakness. Samsung rates it at 40 hours (always-on display off) or 30 hours (on), and real-world results are merely okay — roughly 27-45 hours depending on settings, with the 44mm a particular underperformer. A full charge takes around an hour to 90 minutes.
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.
Samsung Galaxy Watch 8
One UI Watch 8 on Wear OS 6, running on the 3nm Exynos W1000 with 2GB of RAM and 64GB of storage. Gemini is built into the wrist. Performance is snappy and Samsung Health is comprehensive — but the deepest features need a Samsung phone, and there's no iOS support.
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.
Samsung Galaxy Watch 8
Sapphire-crystal glass over an armor-aluminum case, rated 5 ATM plus IP68 and MIL-STD-810H. It holds up well to everyday knocks — a month of heavy wear left long-term reviewers with barely a scratch.
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.
Samsung Galaxy Watch 8
Dual-frequency GPS, Bluetooth, Wi-Fi and NFC payments. An optional LTE model adds standalone connectivity for about $50 more.
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.
Samsung Galaxy Watch 8
At about $349.99 (40mm) rising to roughly $429.99 for the 44mm LTE, the Galaxy Watch 8 took a price hike reviewers widely call unjustified. It's the richest-software Wear OS watch — but the Pixel Watch 4 and OnePlus Watch 3 both counter hard on, respectively, polish and battery.