The short answer to the Pixel Watch 3 vs Galaxy Watch 7 question comes down to your phone. If you carry a Samsung Galaxy phone, the Galaxy Watch 7 is the better pick, because its headline health features — ECG and FDA-cleared sleep apnea detection — only work when paired with a Galaxy phone. If you use a Pixel or any other Android phone, the Pixel Watch 3 makes more sense, and its Fitbit-powered health platform is arguably the stronger of the two anyway. Both launched in 2024, both run Wear OS 5, and neither works with an iPhone.
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- The Galaxy Watch 7 starts about $50 lower and includes sapphire glass, but its ECG and sleep apnea features require a Samsung phone
- The Pixel Watch 3 works fully with any modern Android phone and adds FDA-cleared Loss of Pulse Detection
- Health coaching differs: some Fitbit insights sit behind a Fitbit Premium subscription, while Samsung Health is free
Pixel Watch 3 vs Galaxy Watch 7 at a glance
On paper these two are closer than any previous Google–Samsung matchup. Both offer two case sizes, bright 2,000-nit AMOLED displays, 5ATM + IP68 water and dust resistance, 32GB of storage, and dual-frequency GPS. Here is how the official specifications line up:
| Specification | Pixel Watch 3 | Galaxy Watch 7 |
|---|---|---|
| Sizes | 41mm / 45mm | 40mm / 44mm |
| Launch price (Wi-Fi/Bluetooth) | $349.99 / $399.99 | $299.99 / $329.99 |
| Display | Actua AMOLED, up to 2,000 nits, 1–60Hz | Super AMOLED (1.3″ / 1.5″), up to 2,000 nits |
| Cover glass | Corning Gorilla Glass 5 (3D) | Sapphire crystal |
| Chip | Snapdragon W5 Gen 1 + Cortex-M33 co-processor | Exynos W1000 (3nm) |
| Battery (rated) | Up to 24h with always-on display; 36h in Battery Saver | Up to 30h (AOD off) / 24h (AOD on) |
| Durability | 5ATM, IP68 | 5ATM, IP68, MIL-STD-810H |
| Signature health features | Fitbit tracking, ECG, Cardio Load, Daily Readiness, Loss of Pulse Detection | BioActive sensor, ECG*, sleep apnea detection*, Energy Score, AGEs index |
| Subscription | Fitbit Premium optional for some insights | None — Samsung Health is free |
| Phone compatibility | Any recent Android phone (no iPhone) | Android; *ECG and sleep apnea need a Samsung phone |
Design and display
The Pixel Watch 3 keeps Google’s pebble-like circular design with a rotating crown, and the 2024 model meaningfully shrank the bezels while adding a second, larger 45mm size. The Galaxy Watch 7 sticks with Samsung’s more traditional sporty look, two physical buttons, and a capacitive touch bezel for scrolling (the mechanical rotating bezel is reserved for the Watch Ultra and Classic models).
Durability favors Samsung. The Galaxy Watch 7 uses a sapphire crystal, which resists scratches better than the Gorilla Glass 5 on the Pixel, and it carries MIL-STD-810H certification on top of the same 5ATM/IP68 rating both watches share. Published drop-in reviews consistently note the Pixel’s domed glass looks elegant but sits more exposed on the wrist.
Health and fitness tracking
This is where the two platforms genuinely diverge.
Fitbit on the Pixel Watch 3
Google leans on Fitbit for readiness and training features: Daily Readiness, Cardio Load and Target Load for structured training, a Morning Brief summary, plus ECG, skin temperature and SpO2 sensing. The standout is Loss of Pulse Detection, an FDA-cleared feature that can automatically call emergency services if the watch detects your heart has stopped — a capability no Samsung watch offers. The catch: some deeper Fitbit insights require a Fitbit Premium subscription after the included trial.
Samsung Health on the Galaxy Watch 7
Samsung’s BioActive sensor got a substantial upgrade in the Watch 7, powering an Energy Score, an experimental AGEs index tied to metabolic health, and FDA-cleared sleep apnea detection. Expert reviews generally rate its dual-frequency GPS among the most accurate in any mainstream smartwatch. The caveat repeats throughout Samsung’s fine print, though: ECG and sleep apnea detection require the Samsung Health Monitor app, which only runs on Samsung Galaxy phones. If you’re curious what a wrist ECG can and cannot tell you, see our explainer on what a smartwatch ECG actually measures.
Neither watch should be treated as a medical device for diagnosis — both companies position these as wellness and screening features.
Battery life and charging
Google rates the Pixel Watch 3 at 24 hours with the always-on display active and up to 36 hours in Battery Saver; Samsung quotes up to 30 hours with the always-on display off. In practice, published reviews and user feedback point the same direction: the Pixel Watch 3 — especially the 45mm with its 420mAh battery — more reliably clears a full day plus a night of sleep tracking, while the Galaxy Watch 7 tends to land closer to a single day. The Pixel also charges faster, reaching roughly half its capacity in under half an hour. For broader context on how these numbers stack up across brands, see our guide to which smartwatches last the longest.
Software, performance, and ecosystem
Both watches run Wear OS 5 with access to the same Google Play app catalog, Google Maps, Google Wallet, and Assistant. Samsung layers One UI Watch on top, adding its double-pinch gesture and tighter hooks into Galaxy phones and SmartThings. The Pixel Watch 3 counters with deeper Google-native integrations: offline Google Maps, Google Home controls with camera feeds, Call Screen from the wrist, and Fitbit as the default health hub.
Performance is a quiet win for Samsung. The 3nm Exynos W1000 is a newer, faster chip than the aging Snapdragon W5 Gen 1, and reviewers note snappier app launches on the Watch 7 — though the Pixel’s co-processor design keeps day-to-day scrolling smooth, and long-term software support runs through Google itself.
Which one should you buy?
- You use a Pixel or any non-Samsung Android phone
- You want Fitbit's readiness and training-load coaching
- Longer real-world battery life and faster charging matter
- You want Loss of Pulse Detection as a safety net
- You already own a Samsung Galaxy phone
- You want sleep apnea screening and top-tier GPS accuracy
- Sapphire glass and MIL-STD durability appeal to you
- You'd rather never pay a health subscription
The value equation matters too: the Galaxy Watch 7 launched $50 cheaper at both sizes and asks for no ongoing fees, which makes it the budget-friendlier pick even before discounts. The Pixel Watch 3 justifies its premium with better battery endurance, the more polished health-coaching experience, and a unique emergency feature — provided you accept that its richest insights work best with (though don’t strictly require) Fitbit Premium.
Frequently asked questions
Do the Pixel Watch 3 or Galaxy Watch 7 work with an iPhone?
No. Both are Android-only. The Pixel Watch 3 pairs with any recent Android phone, and the Galaxy Watch 7 pairs with most Android phones — but iPhone users should look at the Apple Watch instead.
Can the Galaxy Watch 7 measure blood pressure?
Samsung offers a blood pressure feature in some countries, but it requires a Samsung phone, regular cuff calibration, and it is not cleared for use in the United States. Our article on whether smartwatches can measure blood pressure accurately explains why wrist-based readings remain a work in progress.
Do I need a subscription with either watch?
Samsung Health is completely free. The Pixel Watch 3 shows core stats free too, but certain Fitbit insights — like the full Daily Readiness breakdown — sit behind Fitbit Premium (about $9.99/month) after the bundled trial ends.
Which watch tracks sleep better?
Published accuracy comparisons put both among the better Wear OS sleep trackers, with Fitbit’s staging having the longer validation track record and Samsung adding FDA-cleared sleep apnea screening for Galaxy phone owners. Keep expectations realistic: no wearable matches a sleep lab, and stage-by-stage accuracy varies for everyone.