The smartwatch you should buy depends on your phone first, not the price. An Apple Watch only works with an iPhone; a Samsung or Pixel watch only works with Android. Get that right and the rest is easy. For iPhone owners our pick is the Apple Watch Series 11, around £375.10 inc VAT. You can stop here and be happy.
Want the pick for your exact situation? Here it is:
- iPhone, best valueApple Watch SE (3rd gen), a real Apple Watch for around £222.62 inc VAT
- Adventure and batteryApple Watch Ultra 3, the toughest, longest-lasting Apple Watch (around £761.39 inc VAT)
- Android phoneBuy a Samsung Galaxy Watch (we are honest: we do not stock it). Phone-free fitness we do stock: ASUS VivoWatch 5
- Just fitness, any phoneA Garmin is the battery and GPS king. Our stocked all-rounder is the ASUS VivoWatch 5
- KidsLook at dedicated kids watches (Garmin Bounce, Xplora), not a full smartwatch
Why your phone decides, why "men's" and "women's" watches are the same watch, and the specs that actually matter: all below.
Apple Watch Series 11 GPS 42mm Space Grey Aluminium Black Sport Band S/M
In stock
£375.10 inc VAT- GPS functionality with multi-satellite support including GLONASS and Galileo
- Advanced health monitoring: heart rate, blood oxygen, skin temperature, and sleep quality
- Durable design with 50m water resistance and IP6X dust protection
- Vibrant Always-on Retina OLED display with 2000 cd/m² brightness
- Powered by Apple S10 dual-core processor and watchOS 11
- Extensive activity tracking for over 20 recommended sports
- Innovative accessibility features and SOS alert function
The one thing that decides everything: your phone
Most smartwatch guides start with screens and heart-rate sensors. That is the wrong order. The first question is which phone you own, because it rules out most of the shelf before you spend a penny.
An Apple Watch only works with an iPhone. There is no Android support at all, and there never has been. A Samsung Galaxy Watch or Google Pixel Watch needs an Android phone. Buy the wrong one and it simply will not pair.
The one rule that decides everything: an Apple Watch needs an iPhone; a Samsung or Pixel watch needs Android. Diagram: Hardvance.
The exceptions are the fitness brands. A Garmin or a Huawei watch works with both iPhone and Android, because they lean on their own app rather than the phone maker. That is worth knowing if you switch phones often.
So the honest version of this guide is short. On iPhone, buy an Apple Watch, and the only question left is which one. On Android, the Samsung Galaxy Watch is the one to get. We are a UK shop and we mostly stock Apple Watches, so we will tell you plainly where a watch we do not sell is the better answer.
Best for iPhone: Apple Watch Series 11
The pick: for most iPhone owners the Apple Watch Series 11 is the one to buy. It has the always-on screen, the fast chip, the full health suite and the widest choice of sizes and bands, without the Ultra’s price.
The Series is the mainstream Apple Watch for a reason. You get the bright always-on display that the cheaper SE leaves out, the newest sensors, and fast charging that fills the battery over a coffee. For daily notifications, workouts, contactless pay and sleep tracking, nothing pairs with an iPhone more smoothly. Pick the 42mm for smaller wrists or the 46mm for a bigger screen; add Cellular only if you want to leave your phone at home on runs.
Apple Watch Series 11 GPS 42mm Space Grey Aluminium Black Sport Band S/M
In stock
£375.10 inc VAT- GPS functionality with multi-satellite support including GLONASS and Galileo
- Advanced health monitoring: heart rate, blood oxygen, skin temperature, and sleep quality
- Durable design with 50m water resistance and IP6X dust protection
- Vibrant Always-on Retina OLED display with 2000 cd/m² brightness
- Powered by Apple S10 dual-core processor and watchOS 11
- Extensive activity tracking for over 20 recommended sports
- Innovative accessibility features and SOS alert function
Best value: Apple Watch SE (3rd gen)
The pick: the Apple Watch SE (3rd gen) is the honest budget Apple Watch. It does the important things (notifications, workouts, fall detection, sleep) for around £229, and most people never miss what it leaves out.
The SE drops the always-on screen and a couple of health sensors, and that is it. For a first smartwatch, for a child moving up from a kids watch, or for anyone who just wants Apple Watch basics without paying flagship money, it is the sensible buy. If the always-on display matters to you, step up to the Series; if it does not, save the difference.
Apple Watch SE (3rd Gen) GPS 40mm Midnight Aluminium with Sport Band S/M
Out of stock
£222.62 inc VAT- WatchOS 11 operating system with Apple S10 processor
- Waterproof up to 50m with Ion-X glass and aluminium case
- OLED Retina display with 1000 cd/m² brightness and 324 x 394 pixel resolution
- Comprehensive health monitoring including heart rate, sleep quality, and irregular rhythm notifications
- Built-in GPS, multisport tracking, and activity monitoring
- SOS alert function, fall detection, and crash detection for safety
- Wireless charging and up to 32 hours battery life
Best for fitness and adventure: Apple Watch Ultra 3
The pick: the Apple Watch Ultra 3 is the toughest, longest-lasting Apple Watch, with multi-day battery, a brighter screen and precision dual-band GPS. If you hike, dive, or just hate charging, this is the one.
The Ultra is built for people who push a watch: titanium case, the biggest battery in the range, and a screen you can read in full sun. It is overkill for city notifications, but for trail running, open-water swimming and long days outdoors it earns its price.
Apple Watch Ultra 3 GPS + Cellular 49mm Black Titanium Black Alpine Loop S
Out of stock
£761.39 inc VAT- Apple Watch Ultra 3 GPS + Cellular 49mm Black Titanium Case with Black Alpine Loop – Small
- Waterproof up to 100 m with IP6X and MIL-STD-810H military standard
- OLED Retina display with 3000 cd/m² brightness and Sapphire watch glass
- Powered by Apple S10 processor with watchOS 11 and 64 GB flash memory
- Extensive health monitoring including heart rate, blood oxygen, and skin temperature sensors
- Multi-sport mode and activity tracking for diverse fitness activities
- Features 5G mobile network connection, GPS, GLONASS, Galileo, and Bluetooth 5.3
Being fair: for pure fitness and battery life, a Garmin still beats every Apple Watch, often lasting a week or more per charge. We do not stock Garmin. If battery life is your top priority and you do not need Apple’s apps, buy one with our blessing.
If you have an Android phone
This is where we are most honest. An Apple Watch will not work with your phone, so none of the picks above apply to you. The right answer is a Samsung Galaxy Watch (the best Wear OS watch, and the natural match for a Samsung phone) or a Google Pixel Watch. We do not stock either, and we would rather you bought the right watch than the nearest one.
What we do stock for Android and iPhone users alike: the ASUS VivoWatch 5, a phone-agnostic fitness watch with built-in GPS and multi-day battery. It is not a full app-running smartwatch, but if you mainly want health and workout tracking that works with any phone, it is a tidy, affordable option.
ASUS VivoWatch 5 HC-B05 1.34″ LCD GPS Smartwatch
In stock
£310.03 inc VAT- Comprehensive health tracking: heart rate, blood pressure, blood oxygen, skin temperature, sleep quality, and stress monitoring
- Built-in GPS and altimeter for accurate indoor and outdoor activity tracking
- Multisport mode and 5 ATM water resistance for diverse fitness activities
- SOS alert function and personal goals for enhanced safety and motivation
- Long-lasting battery with up to 14 days of life from a single charge
- Compatible with Android and iOS mobile operating systems via Bluetooth 4.2
- Removable leather and silicone bands in black and orange for personalized style
Watches for kids
“Kids smart watch” is a huge search, and the honest advice is to not buy a full adult smartwatch for a young child. Dedicated kids watches like the Garmin Bounce or the Xplora range add parental controls, location sharing and a calls-and-messages setup built for families, usually with a SIM. We focus on premium Apple Watches rather than kids watches, so if that is what you need, one of those brands is the better buy. For an older child or teen on an iPhone, the Apple Watch SE (3rd gen) is a solid step up.
“Men’s” and “women’s” smart watches are usually the same watch
Search results are full of “smart watches for men” and “smart watches for women”, so here is the plain truth: on the big platforms they are the same watch in different sizes and bands. An Apple Watch comes in two case sizes (for example 42mm and 46mm) and dozens of straps; smaller wrists tend to prefer the smaller case and a softer band, larger wrists the bigger case. That is the whole difference. Do not pay more for a “ladies” or “men’s” label; choose the case size that fits your wrist and the band you like.
Translate the spec sheet
GPS vs GPS + Cellular
GPS models rely on your phone for calls and data when you are out of Bluetooth range. Cellular models have their own eSIM, so you can leave the phone at home and still get calls, texts and streaming, for a monthly fee on your carrier. Most people are happy with GPS; add Cellular only if you run or cycle without your phone.
Aluminium vs titanium
Aluminium is lighter and cheaper and is what most people should buy. Titanium is stronger and more scratch-resistant and looks more premium, but it adds a lot to the price for a difference you may never notice under a sleeve.
Case size
Bigger cases mean a bigger, easier-to-read screen and slightly more battery, but they look large on slim wrists. When in doubt, try both sizes on before deciding; the screen difference is smaller than the numbers suggest.
Can it look after your heart? The health questions people actually ask
The single most searched smartwatch question is whether it can spot a heart problem. Here is the honest answer.
AFib and irregular heart rhythm
Modern Apple Watches (Series and Ultra, not the SE) can take an ECG and send an irregular rhythm notification that may flag atrial fibrillation, or AFib, the most common heart-rhythm problem. Samsung and Withings watches do similar on Android. It is not a diagnosis; it is a prompt to see a doctor. It has genuinely caught problems early for a lot of people, so if heart tracking is your reason to buy, this is a real and useful feature.
Blood pressure and blood sugar: read the small print
Be careful with “blood pressure” claims. Reliable cuffless blood pressure from the wrist is still limited and usually needs calibrating against a real cuff, so treat a single reading as a rough guide, not a medical number. And no wrist watch measures blood sugar today, whatever a cheap listing promises.
Pacemakers and safety
If you have a pacemaker or ICD, the watch is generally fine to wear, but keep it and especially its magnetic charger a short distance from the device and follow your cardiologist’s advice. When in doubt, ask them.
A smartwatch is a helpful nudge, not a medical device. It is brilliant for spotting trends and flagging the odd thing worth checking. It should never replace a doctor.
Quick answers
For iPhone owners we pick the Apple Watch Series 11 for its always-on screen, health suite and smooth iPhone pairing. For Android phones the best watch is the Samsung Galaxy Watch, which we do not stock. Your phone decides more than the price does.
No. An Apple Watch only pairs with an iPhone, and there is no Android support. If you have a Samsung or other Android phone, buy a Samsung Galaxy Watch or a Google Pixel Watch instead.
GPS models use your phone for calls and data when out of Bluetooth range. Cellular models have their own eSIM, so you can leave the phone behind and still get calls and texts, for a monthly carrier fee. Most people are fine with GPS.
On the major platforms they are the same watch in different case sizes and bands. Choose the case size that fits your wrist and a band you like rather than paying for a gendered label.
For most people, yes. The SE handles notifications, workouts, sleep and fall detection. It mainly leaves out the always-on display and a couple of sensors. If you do not need those, it is the best-value Apple Watch.
A Garmin, which can last a week or more per charge, far longer than any Apple Watch. We do not stock Garmin, but if battery life is your priority and you do not need Apple's apps, it is the honest choice. Among Apple Watches, the Ultra 3 lasts longest.
Yes, to a point. Apple Watch (Series and Ultra) and several Android watches take an ECG and can send an irregular-rhythm notification that may flag AFib. It is a prompt to see a doctor, not a diagnosis, but it has caught real problems early. The cheaper Apple Watch SE leaves the ECG out.
For iPhone owners the Apple Watch Series or Ultra has the fullest health suite: ECG, blood oxygen, irregular-rhythm alerts and temperature. For pure fitness with multi-week battery a Garmin is superb, though we do not stock it. Ignore wrist 'blood pressure' and 'blood sugar' claims; they are still unreliable or simply fake.
Generally yes to wear, but keep the watch and especially its magnetic charger a short distance from the device, and follow your cardiologist's guidance. If you are unsure, ask your doctor before relying on any of its heart features.
Usually the always-on display, GPS workouts, a flood of notifications, or an ageing battery. Turning off always-on and trimming notifications helps a lot. An Apple Watch typically lasts a day or two; if you want a week or more per charge, a Garmin or Huawei is the honest answer.
Yes, with a kids watch that takes its own SIM, such as a Garmin Bounce, Xplora or Tikkers. These handle calls, messages and location sharing without a paired phone and add parental controls a full smartwatch does not.
An 'Android watch' just means a smartwatch running Google's Wear OS that pairs with Android phones, like the Samsung Galaxy Watch or Pixel Watch. 'Smart watch' is the general term for all of them, including the Apple Watch. The real difference is which phone each one works with.
Browse the full smartwatch range, in stock and shipped from the UK:
How we know
Hardvance is a UK hardware retailer. We wear the watches we sell and handle the returns when one is the wrong fit, which teaches you what a spec sheet cannot. Every pick was in stock when this was written, the cards show live prices, and no brand paid to appear. Where the best watch for a job is one we do not stock, such as a Samsung Galaxy Watch or a Garmin, we say so plainly.
