Interested in reviews of Samsung Galaxy Watch9 40mm Black? It got 4.8 out of 5 stars from our customers. Find specific customer reviews of Samsung Galaxy Watch9 40mm Black below. We will appreciate if you also share your experiences with Samsung Galaxy Watch9 40mm Black after purchasing.
Rated 10/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
As a first smartwatch, the Galaxy Watch 9 is a decent choice overall, because it offers a lot of useful features and is only slightly more expensive than the older Watch 8. As a normal person with a bit of healthy scepticism, however, I do have a few minor reservations, although they are mostly small details. In practice, the unnecessarily short charging cable is quite disappointing, as is the fact that the charger doesn't hold onto the watch very securely. And although the overall design is well-done, it's comfortable to type on, and it reliably measures a load of bodily functions from sleep to temperature to a barometer, the watch just feels quite high on my wrist and simply sticks out a bit too much. Overall, though, these minor issues are easily outweighed by the brilliantly fine-tuned system and how well and intuitively it works in real-world use.
Beautiful design
weight
features, sleep tracking also works during the day (short naps)
short charging cable
The charger could hold a little more firmly.
Feels quite high.
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Jan, Krupka 3
Rated 09/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
As always, well-made, and the ergonomics of the small model are perfect. The protective film was applied acceptably by the seller, but you could probably do a better job yourself. The Galaxy Watch9 is light, thin, and very comfortable on the wrist. The controls are responsive (as you'd expect with a 3nm chip), we'll see how often it needs restarting. Still no dedicated torch, but 3000 nits will probably solve most situations. It gets as warm as the Watch8 when charging, but at least the chargers are compatible. I guessed the strap size right, but only just – it would be good to have an option with some measuring guide, though I'll be using my other trusty one from the Watch8 anyway. Can't wait for it to have respiratory or cardiac arrest detection, even if it's unofficial.
and the compact 40mm are very usable
display (+torch) is just as good as the Watch8
only a minor change from the Watch8
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Irina Silina, Praha
Rated 09/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
Everything was fine, thank you
No
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Tomáš, Liberec
Rated 07/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
I wear the watch pretty much non-stop, and the main thing I have to praise is the weight. You can barely feel the 40mm on your wrist; after a few days, you stop noticing it, even when sleeping. In terms of looks, they're discreet — the black version doesn't come across as a 'gadget', so I have no problem wearing it with more formal clothing. The display is brilliant. It's readable even in direct sunlight; I don't have to shield it with my hand or raise my wrist to my eyes, I just look and I can see. The only thing I would criticise is the battery life. I charge it every morning, which I personally don't mind — it's become part of my routine, and I don't think about it. But anyone expecting to throw the watch on the charger once over the weekend and be done with it will probably be disappointed. You have to be prepared for daily charging.
Display
Functions
GPS
Application
Sensors
Battery life
Silicone strap (but I have more sensitive skin)
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Nikola, brandýs nad Labem
Rated 06/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
The switch from the Galaxy Watch 46mm (gen1) to this is a really significant one. I'll overlook the battery life, which isn't the best (my old ones lasted 4 days), but on the other hand, I'm happy with the new OS thanks to the wider app support. My main reason, however, was the health and monitoring features, which are beyond comparison, and the amount of information you suddenly have available is brilliant. The new feature for analysing them looks very good.
Functions
Wear OS
Display
SHealth sensors
Application
Battery
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Oldřich, Hrušky
Rated 03/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
I'm thrilled with the Samsung Galaxy Watch 9 in black. It's fast, has a premium build quality and very good battery life. I also appreciate the significantly more advanced Gemini assistant, which responds quickly and makes the watch feel much smarter. The strap is super durable for exercise (black is more elegant than white). Samsung Health and the huge selection of different exercises are also great. Simply I❤️Galaxy
Design
Speed
Battery
Gemini Assistant
Colour
are not
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Customer, Brno
Rated 03/08/2026, variant Samsung Galaxy Watch9 40mm Black
Verified purchase
The watch may only offer about one day of battery life, but otherwise, it has everything I need from a smartwatch. It monitors health data, measures sleep, and accurately auto-detects different types of exercise. Pairing with my Galaxy S25 Ultra was quick and trouble-free. I was also pleasantly surprised by the sleep tracking. I fell asleep for about 40 minutes after lunch, and the watch recognised I was sleeping on its own, even though it was just a short nap. So far, I'm very satisfied with them.
They do everything I wanted for monitoring health, exercise and even sleep.
The battery lasts about one day, but that's a minor detail.
Upgrading from the Galaxy Watch 5 to the Watch 9 is a huge leap forward. What impressed me the most is the significantly smoother system, the brighter display in the sun, and the much longer battery life. The advanced sleep tracking and more accurate heart rate monitoring work brilliantly. In my opinion, it's the best watch for a Samsung Android!
I have been using Samsung watches since Galaxy watch active 2 was launched and upgraded from Galaxy watch 7. Compared to watch 7, watch customization improved significantly by introduction of new customisable watch faces. Using Gemini as a companion on your wrist proved invaluable when you just want a quick answer to a question or even to find some hidden setting in the watch menu.
more health analysis options
new customisable watch faces
larger screen and battery
charging significantly slower than Watch 7 (might be software related)
I upgraded my watch from a really old version, specifically the Galaxy Watch 4, so it had been through a lot, and so far I'm very happy with the Galaxy Watch 9. The battery life is at least a bit longer, and the running coach is a great motivator to get active. Making calls via the watch is superb – the sound is clear and the person on the other end can hear me well. The watch has a sophisticated design, and the watch faces even offer the option to create your own design with a photo. The AI assistant can help with quick advice so I don't have to pull out my phone straight away. Everything works as it should. I also appreciate the 'health' features like blood pressure monitoring, ECG, body composition, sleep apnoea checks, and any further advice regarding rest or physical activity. I was hesitating for a long time about whether to get another Samsung because of the battery or go for a watch from a different manufacturer, but in the end, I'm glad I made my decision.
My only concern is the raised glass and the possibility of scratching its edges. Otherwise, nothing so far.
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