The best smartwatch in 2026 is mostly decided by your phone. iPhone owners should choose an Apple Watch: the Series 12 for most people, the SE 3 on a budget and the Ultra 4 for outdoor sports and long battery life. Android owners should pick the Galaxy Watch 9 if they use a Samsung phone and the Pixel Watch 5 if they use a Pixel or prefer Google’s design. Runners, hikers and anyone who hates daily charging should look at Garmin, which works with both iPhone and Android.
Below, we compare the main models, explain compatibility rules that catch many buyers and cover what to inspect before buying new or used. Prices are typical or indicative ranges as of late 2026.
Our picks at a glance
| Model | Best for | Key specs | Typical new price | Used price (indicative) |
|---|---|---|---|---|
| Apple Watch Series 12 | Most iPhone owners | 42 or 46 mm, S11 chip, up to 24 h battery | $380 to $500 | $280 to $380 |
| Apple Watch SE 3 | Budget iPhone pick and kids | S10 chip, always-on display | $230 to $280 | $160 to $210 |
| Apple Watch Ultra 4 | Outdoor sports, diving, long battery | 49 mm titanium, up to 50 h battery | $780 to $850 | $600 to $700 |
| Samsung Galaxy Watch 9 | Samsung phone owners | 40 or 44 mm, AMOLED, sleep apnea feature | $350 to $430 | $230 to $300 |
| Google Pixel Watch 5 | Pixel and other Android phones | 41 or 45 mm, Loss of Pulse Detection, Fitbit-based tracking | $380 to $450 | $260 to $330 |
| Garmin Venu 4 | Health tracking with long battery | 41 or 45 mm, AMOLED, up to 12 days battery, built-in flashlight | $500 to $600 | $350 to $430 |
| Garmin Forerunner 970 | Serious runners and triathletes | AMOLED, multi-band GPS, maps, flashlight | $700 to $750 | $500 to $600 |
Compatibility: check this first
Smartwatches are not universal accessories. Choosing the wrong platform is the most expensive mistake buyers make, especially on the used market.
- Apple Watch works only with an iPhone. It cannot be set up or used with an Android phone.
- Samsung Galaxy Watch models run Wear OS and work only with Android phones. Some health features, such as ECG and blood pressure on certain models, require the Samsung Health Monitor app on a Galaxy phone.
- Google Pixel Watch works with Android phones, not iPhones.
- Garmin watches pair with both iPhone and Android through the Garmin Connect app, which makes them the safest choice if you might switch phones.
Also check your phone’s software version. Each new watch generation usually needs a recent iOS or Android version, so an older phone can limit which watches you can use.
Best smartwatch for iPhone users
Apple Watch Series 12
Announced in September 2026, the Series 12 runs on Apple’s S11 chip and comes in 42 mm and 46 mm sizes, starting at $399 in the USA. Its headline addition is a new health sensing system that samples heart rate every five seconds and powers a daily readiness score. Apple rates battery life at up to 24 hours. Aluminum, titanium and ceramic cases are available, with the ceramic version positioned at the top of the range.
Apple Watch SE 3
The SE 3 remains Apple’s entry model at $249. It uses the S10 chip and gained an always-on display, a feature previous SE models lacked. It skips some advanced health sensors found on the Series line, including ECG, so health-focused buyers should compare carefully. It is an excellent choice for first-time users and for children set up through Family Setup with a cellular model.
Apple Watch Ultra 4
The Ultra 4 keeps the rugged 49 mm titanium case, brighter display and extra action button of the Ultra line, with battery life rated up to 50 hours and longer in low power mode. It starts at $799 in the USA. It is designed for trail runners, hikers, sailors and recreational divers, but many buyers simply choose it for the battery and bigger screen.
Best smartwatch for Android users
Samsung Galaxy Watch 9
Samsung’s 2026 watch comes in 40 mm and 44 mm sizes, with a bright AMOLED display and the company’s latest health tools, including an FDA-cleared sleep apnea feature. Samsung’s training plans and AI coaching are free, but they require a Samsung phone. If you own a Galaxy phone, it is the most integrated choice.
Google Pixel Watch 5
The Pixel Watch 5 keeps the round, domed design of the line in 41 mm and 45 mm sizes and adds improved GPS accuracy. Its safety features include Loss of Pulse Detection and fall detection, while Google Health Premium unlocks AI coaching and training plans for a monthly or yearly fee. It pairs best with Pixel phones but works with most recent Android devices.
Best smartwatch for fitness and battery life: Garmin
Garmin focuses on training data and battery life rather than apps and voice assistants. The trade-off is a smaller app ecosystem and more limited smart replies, especially on iPhone.
- Garmin Venu 4: launched in September 2025 at $549.99, it combines an AMOLED touchscreen, a built-in LED flashlight and up to 12 days of battery (about 4 days with always-on display). Health Status and lifestyle logging help you see how sleep, caffeine and stress affect recovery.
- Garmin Forerunner 970: Garmin’s premium running watch, with multi-band GPS, onboard maps, advanced training metrics and a flashlight. It suits marathoners and triathletes who want detailed coaching data.
Smartwatch features that actually matter
- Battery life: one day for most Apple and Wear OS watches, several days to weeks for Garmin.
- Cellular (LTE): lets you call, stream and use emergency features without your phone, but adds a monthly carrier fee.
- Health sensors: heart rate is standard; ECG, temperature sensing, blood oxygen and hypertension or sleep apnea alerts vary by model and region.
- Safety features: fall detection, crash detection and emergency SOS are worth having for older relatives and solo athletes.
- Size and comfort: a watch you wear at night must be light enough to sleep with.
What to check before buying
- Phone compatibility: match the watch to your phone and its software version.
- Activation lock: Apple Watch Activation Lock and Google or Samsung account locks must be removed by the previous owner.
- Battery health: Apple Watch shows maximum capacity in settings; ask the seller for a screenshot.
- Case size and band: bands are size-specific, and very small or large sizes may not fit every wrist.
- Cellular carrier support: confirm that your carrier in the USA or Canada supports that watch model for LTE plans.
- Authenticity: fake Apple Watches and bands are common on marketplaces. Our guide to spotting fake eBay listings lists the typical warning signs.
New vs used: what to pick
Smartwatches lose value quickly, which makes used and refurbished models attractive. A recent previous-generation watch, such as the Apple Watch Series 10 or 11, a Galaxy Watch 8 or a Pixel Watch 4, offers most of the experience of the newest model at a significant discount. Garmin watches also hold up well because their batteries start with much more capacity.
The risks are battery wear, scratched screens and locked devices. Buy new if you plan to keep the watch for four years or more, or if you want the latest health features. Buy used if you can verify the activation lock and battery. Our dedicated used smartwatch buying guide explains activation locks, battery checks and sizing in detail, and our explainer on eBay Refurbished condition grades helps you compare refurbished listings.
If you are upgrading your phone at the same time, see our checklist on how to buy a used smartphone on eBay so that both devices work together from day one.
Frequently Asked Questions
Can I use an Apple Watch with an Android phone?
No. An Apple Watch must be set up with an iPhone, and it does not support Android phones. Android users should look at Samsung, Google or Garmin.
Which smartwatch has the best battery life?
Garmin models lead by a wide margin, lasting from several days to weeks per charge. Among Apple models, the Ultra 4 lasts the longest, at up to 50 hours.
Is the Apple Watch SE 3 good enough?
For notifications, fitness tracking, safety features and Apple Pay, yes. Choose the Series 12 if you want features such as ECG, the new health sensing system and a larger screen.
Do Galaxy Watches work with non-Samsung Android phones?
Yes, they work with most Android phones, but some health features and Samsung’s coaching tools require a Samsung Galaxy phone.
Is it worth buying a used Apple Watch?
It can be a great deal if Activation Lock is removed, battery capacity is reasonable and the model still receives watchOS updates. Avoid listings where the seller cannot show the watch unpaired.
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