Samsung’s Galaxy Watch 8 is here, and it’s a clear upgrade to the Galaxy Watch 7. At first glance, both smart watches look pretty similar. But spend a few minutes with the Watch 8, and you’ll notice some smart tweaks and improvements. It’s slimmer, the screen is brighter, and it comes with smarter AI-powered health features.
Looking for a new smartwatch? This guide will help you out by breaking down the benefits of both the Galaxy Watch 8 and Watch 7, and help you decide which one’s the best fit for your wrist.
Comparison table: Galaxy Watch 8 vs Watch 7
Here’s a snapshot of how these two premium Samsung wearables stack up.
| Feature | Galaxy Watch 8 | Galaxy Watch 7 |
|---|---|---|
| Release year | 2025 | 2024 |
| Design | Slimmer (8.6mm), “cushion” squared bezel, Armor Aluminum case, dynamic lugs, 11% thinner | Rounded bezel, Armor Aluminum case, 9.7mm thickness |
| Display | 40mm: 1.34" (438x438), 44mm: 1.47" (480x480), Super AMOLED, 3,000 nits, Sapphire Crystal glass | 40mm: 1.3" (432x432), 44mm: 1.5" (480x480), Super AMOLED, 2,000 nits, Sapphire Crystal glass |
| Processor | Exynos W100, 3nm process | Exynos W100, 3nm process |
| RAM & Storage | 2GB RAM / 32GB storage | 2GB RAM / 32GB storage |
| Battery capacity | 40mm: 325mAh, 44mm: 435mAh | 40mm: 300mAh, 44mm: 425mAh |
| Battery life | Up to 40 hours – perfect for long weekends without a charge | Up to 28 hours – usually daily charging needed |
| Charging speed | Fast charging (WPC wireless) | Fast charging (WPC wireless) |
| Sensors | BioActive Sensor (optical + electrical + BIA), temperature sensor, accelerometer, barometer, gyroscope, geomagnetic, light sensor, Antioxidant Index, AGEs Index | BioActive Sensor (optical + electrical + BIA), temperature sensor, accelerometer, barometer, gyroscope, geomagnetic, light sensor, AGEs Index |
| Operating system | One UI Watch 8 (Wear OS 6) | One UI Watch 6 (Wear OS 5) |
| Health tracking | Enhanced sleep coaching, vascular load, AI insights, antioxidant monitoring | Advanced sleep & fitness tracking, Energy Score, AI wellness tips |
| Special features | Galaxy AI, Gemini assistant, antioxidant index, improved fitness coaching | AI Energy Score, fitness coaching, snoring detection (Samsung phone) |
| Water & dust rating | 5ATM, IP68, MIL-STD-810H | 5ATM, IP68, MIL-STD-810H |
| Compatibility | Android only | Android only |
| Best for | Anyone who wants the latest features, brighter screen, smarter AI insights, and a sleeker fit | People happy with solid performance and value |
What’s new in the Galaxy Watch 8?
In a nutshell, the Galaxy Watch 8 keeps the classic Galaxy look but adds a few smart tweaks. It’s a little slimmer than the Galaxy Watch 7, the screen is brighter, and there are more ways for it to help with health and wellness. Let’s dive into more detail…
Design and display
The ‘cushion’ squared bezel of the Watch 8 makes it lighter and more comfortable for everyday wear - even when you keep it on overnight for sleep tracking. It’s also 1.4mm thinner than the Watch 7, and while that might not sound like much, it does make a difference on the wrist.
The 1.5-inch Super AMOLED display looks clear and vibrant, and it now reaches up to 3,000 nits of brightness. That’s about double what the Watch 7 offers. That means you can easily check your notifications, map and fitness stats, even in bright sunlight.
All these design changes come together to make the Watch 8 feel a bit more refined and up-to-date. And so lightweight that you might forget you're wearing it - until it buzzes!
Performance and battery
Both watches run on the same Exynos W100 chip, so they’re fast. But with slicker software, the Watch 8 feels snappier.
One UI Watch 8 is Samsung's latest smartwatch software, and it’s a real step-up from the previous version. Apps open quicker, scrolling and navigation is smoother, and transitions feel more natural.
Battery life is another area where the Watch 8 has improved. You get up to 40 hours on a full charge compared with 28 hours on the Watch 7. So, you can now track a weekend of workouts, GPS runs, and sleep without hunting for the charger.
Health & fitness features
The Galaxy Watch 8 has a brand‑new temperature sensor and upgraded antioxidant monitoring. So, it’s now keeping an even closer eye on what’s happening inside your body. And thanks to smarter AI‑powered insights, it now does more with that info.
Say you had a rough night and your sleep score isn’t great. Instead of nudging you to power through a high‑intensity workout, the watch might recommend some light stretching or a slower‑paced start to your day. These small, thoughtful suggestions make health tracking feel more human - rather than just numbers on a screen.
Antioxidant monitoring explained
The new antioxidant tracking measures levels of carotenoids in your skin, which are natural compounds that help your body fight stress and stay healthy. It’s a simple way to get a clearer picture of how your lifestyle - including things like diet, stress, or even sun exposure – could be affecting your overall wellness.
To take a reading, you simply remove the watch and gently press your thumb on the sensor on the back. In just a few seconds, it gives you a score from 0 to 100, showing whether your antioxidant levels are low, moderate, or where they should be.
Should you upgrade from Galaxy Watch 4, 5, or 6?
If you’re using an older Galaxy Watch - like a 4, 5, or 6 - the Galaxy Watch 8 is a real step up. Brighter screen, longer battery, smarter Galaxy AI health insights, and a sleeker, lighter design make it feel much better as soon as you start wearing it.
Should you upgrade from Galaxy Watch 7?
If you’ve already got the Galaxy Watch 7, upgrading to the Watch 8 really depends on what features you think are important.
The Watch 8 has a brighter display, which is handy if you struggle to see your screen in sunlight. Plus, the new cushion bezel design makes it feel a bit more comfy on your wrist. There are also some great new AI features (mentioned above) that make health and fitness tracking smarter and more personal.
If any of these upgrades sound like they’d make your day easier, then the Watch 8 could be worth a look. But if your Watch 7 is still doing its thing and you’re happy with it, there’s no need to rush into an upgrade - it’s still a great smartwatch.
FAQs
What are the main design updates in the Galaxy Watch 8 compared to the Watch 7?
Slimmer squared bezel, lighter feel, and dynamic lugs. Strap swaps are quick and hassle-free, so you can switch from sporty silicone to a leather or metal strap in seconds. The watch also feels less bulky, so it’s more comfortable for everyday wear.
Does the Galaxy Watch 8 come with new health tracking tools that aren’t on the Watch 7?
Yes. On top of the usual sleep, heart rate, and activity tracking, it adds a temperature sensor and antioxidant tracking. The AI-powered insights are more personalised too, giving gentle nudges to improve your routines. For example, reminding you to move after long periods of sitting or suggesting recovery tips after workouts.
Can the Galaxy Watch 8 run One UI Watch 8 and Gemini AI while the Watch 7 can’t?
Exactly. One UI Watch 8 brings faster app performance, smoother transitions, and new widgets. Plus, Gemini AI adds smart suggestions for health, productivity, and daily tasks. Watch 7 doesn’t have these features, so the Watch 8 is more “future-proof” if you want the latest Ai tools.
Are the new strap attachments on Watch 8 incompatible with older bands?
Afraid so. The dynamic lugs on Watch 8 are different, so older straps won’t click in perfectly. On the bright side, there’s a whole range of bands for the Watch 8, from sporty to formal designs.
Will the Galaxy Watch 8 receive software updates longer than Watch 7?
Since it’s newer, it will get updates for longer - meaning better app support, security improvements, and more AI features down the line.
How to trade-in your old smartwatch
If you trade in your Galaxy Watch 6 - or any eligible smartwatch - you can get a chunk of cash to put towards off a brand new Samsung Galaxy Watch 7. Just head to our watch trade-in page to see how much you can save.
Need more advice?
If you’re thinking of getting a new wearable, our smart watch and fitness buying guide is a great place to start. We’ve also got useful articles on which smartwatch should I buy and fitness tracker or smartwatch – what’s the difference? And remember, our expert colleagues in-store will happily answer all your tech-related questions.
