Very good device but not without its issues (e.g. synchronization is not always automatic or the WiFi sometimes does not connect, although it is not particularly important since Bluetooth connects to the phone).

Although personally I am not interested, the operating system is Tizen and not Android, which means that you will not find almost any familiar application in the store, which apart from endless designs to give a different look to your watch, and some mediocre games, it does not have much else. However, besides some simple games like Tamagotchi, who would play what on their watch? :P

Nevertheless, you can send short replies from the notifications you receive through your phone and answer phone calls or listen to music from Spotify.

The measurements are quite reliable but not flawless. Of course, the oximeter and the pulse graph sometimes fell short compared to expensive hospital equipment and pleasantly surprised me.

Something that may be important for some, despite being mentioned in the specifications, this device does NOT have a blood pressure monitor. The blood pressure monitor is a feature that was added to the Samsung Galaxy 4.

I got the watch as a gift for the girl M.
It has an amazing color and she was shocked when she saw it up close. It is twice as beautiful up close than in the pictures. The strap is leather and of good quality.
It synchronizes instantly with her A52s mobile. And it works flawlessly and perfectly. The battery lasts 2-3 days. And the watch measures blood pressure (after calibration with a sphygmomanometer), EKG, oxygen, heart rate, and stress. The measurements are very good. And almost always accurate. It doesn't easily lose heart rate during intense exercise. It measures sleep and sleep phases. It also detects falls, and if it detects that the person hasn't moved for 60 seconds, it makes an SOS call to contacts you have set with GPS coordinates, etc. (Requires connection to the mobile via Bluetooth).

I use the Galaxy Watch 4 Classic with Wear OS. However, the Tizen on the 3 looks much more refined and well-crafted. Without any lag and with perfect movement in the menus. (On the 4 that I have, the Android sometimes freezes and requires a restart). If you're not interested in Google Pay, Google Maps, then maybe the 3 is better because it has a slightly better battery.

The rose version that I bought is the most beautiful Samsung watch for women in my opinion.

The watch has all the basic applications:
calculator
Timer
Stopwatch ⏱️
Alarms
Photo gallery
Internet browser
Here Maps with navigation (in combination with using Here Maps on the mobile)
Voice recording
And many more.

The main difference from the 4 is that it DOES NOT HAVE Google Pay. It DOES NOT HAVE Google Maps. And you can't reply to messages with voice typing.

On the 4, you can speak to the Google keyboard (Gboard) and it types it out for you.

Other than that, the watch is top-notch in appearance, workouts, and functions.

I bought the Watch 3 LTE. After over 1 year of use with Cosmote, it stopped receiving and making calls, even though it is connected to the network and has data and SMS. I took it to the service center, they told me they changed the motherboard, but when I connected it to the network, it did the exact same thing. I took it back, they told me they changed the display, but again, it did the exact same thing. Now, they keep telling me that someone will call me, which hasn't happened for over 2 months. It seems that the service center is unable to fix it and I don't have the ability to contact Samsung directly. Although it is under warranty, it is not worth it for me to pursue legal action. So, anyone who is thinking of buying a Samsung product, should consider what they will do if a problem arises.

As for the rest, the blood pressure measurement is unreliable, and the battery is terrible. In LTE mode and with all other functions closed and minimal phone usage, it barely lasts 16-18 hours. I have bought 3 chargers, one for home, one for the office, and one in my bag. Before this, I had a Chinese Kospet, which easily lasted 2 days with phone functionality.

A very good and high-quality smartwatch, with many measurements and relatively accurate measurements.

However, the rating will be low because:
- The battery is terrible and the charger is very slow.
- The step measurements sometimes showed 4000 steps while I was sitting. I simply noticed that because I have the habit of moving my feet, it counts steps.
In ECG, sometimes it was impossible to find a clear signal, while other times it captured a clean graph immediately without me ever noticing the difference. Other than that, I am satisfied with the accuracy of the measurements (walking, running, oxygen, etc.).

- Essentially, it only works with Samsung mobile phones. With Xiaomi, I had constant disconnections, and sideloading the applications for ECG and blood pressure worked, but without updates and with old versions of the applications. When I got a Samsung mobile phone, I realized that they have nothing to do with it. Generally, the watch is not worth it at all without a Samsung mobile phone, and it's a shame because you choose Android to have the whole ecosystem available. There are better closed systems elsewhere

In terms of functionality, it may be the most complete on Android at the moment. We are expecting to see the 4, which will come with new software in collaboration with Google's wear os. I find it very convenient that I can store songs and go cycling without my phone, only with the buds+ in my ears. I have no issues with connectivity on my oneplus 7t pro. Unfortunately, the galaxy store does not have particularly useful applications, but it has countless free watch faces and third-party apps with watch faces. At the price of 240 that I bought it, I consider it worth it, but definitely not the initial price of 400+. The battery is a major downside, as everyone says. To give you an idea, it drains 3% per hour with the always-on display on (I use it quite a bit when I'm outside as I personally don't like raise to wake). During exercise, it drains 15-17% with one hour of cycling with GPS on and continuous heart rate monitoring. In general, I have turned off heart rate monitoring when not exercising to achieve 2 days of battery life. In the next model, I expect a better play store with applications and a battery or at least fast charging, as this one takes 2 hours to fully charge.

P.S. The rotating bezel makes navigation and the experience excellent, which is why I preferred it over the active 2.

I bought it as a replacement-upgrade for my previous Watch, which lasted me almost perfectly for 2 years, except for the well-known issue with the Back button not functioning. I bought it not only for that, but mainly for the ability of the 3 to measure blood pressure.

Practically, it is the same device, slightly smaller than the previous one by ~1cm (the case) but with the same screen. It comes with an acceptable leather strap, while the previous one came with a rubber strap. It has a flat magnetic charger while the previous one had a non-magnetic upright charger, which allowed the watch to also serve as a desk clock (e.g. next to the bed). It also has a very peculiar box, as you will see in photos from reviews.

Materials, build quality, functions, etc., almost everything is identical, except for the minor changes in design, the strap, and a noticeable slight decrease in battery life (which may be due to the fact that I have only had it for a few days). In any case, battery life is the most significant drawback of the Galaxy Watch, as well as most smartwatches, which I have addressed by having wireless chargers at home and the office. This is also the reason why I deduct one star, as I consider autonomy a very important factor, regardless of the solution we find.

However, its advantages are much more, especially when combined with a Samsung mobile phone (like my Note20 Ultra). It is a very comprehensive smartwatch, you can make calls, write, reply, remotely control your phone, it is a pretty good sports watch, it can act as a navigator, and it can also serve as a portable audio device. It is relatively expensive, but it is definitely the best choice for anyone who wants a smartwatch and combines it with a Samsung mobile phone.

I switched from the Samsung Active to this one.. The difference is obvious.. very good battery! Better screen clarity! Finally, calls and conversations from the watch. The response of the bezel is fantastic (but in winter with long sleeves, the wake with bezel is not very convenient because it easily wakes up and makes calls that shouldn't be made )!! Answering messages goes without saying (I'm not referring to these because I consider them given for a real smartwatch).
The blood pressure measurement is very accurate with good initial calibration!! The ECG simply checks the sinus rhythm for signs of atrial fibrillation..
The color is impressive and the build quality is great!
I would prefer the packaging to include a second strap that is smaller in size (like the one in the active) since I have a small wrist and the M/L is big and I had to open another hole to keep it still on my hand. It takes a 22mm strap and bracelet, so I couldn't use the old ones since the active had a 40mm and wore a 20mm strap.
Nice smartwatch. Let's see when Samsung will open up Tizen and we'll have a bright day with some apps that we use on our phones!