At a Glance: The Verdict
| Apple Watch Series 12 | Samsung Galaxy Watch9 |
|---|---|
|
Best For: iPhone owners who want 64GB of storage, cellular options and a depth gauge The Series 12 costs $399 and runs about 24 hours per charge. It offers more sensors for water and navigation, but you will be charging it daily. |
Best For: Android owners who want longer battery life and body composition data The Galaxy Watch9 (40mm) costs $379.99 and runs about 40 hours per charge. It weighs 31.5 g, adds multi-band GPS, and tracks body composition. |
Quick Buy Path
Check today’s pricing before you go deeper.
If these are already your two finalists, compare current pricing now, then keep reading for the full verdict.
Both watches are 2026 releases with NFC payments and optional cellular. They split on phone compatibility, battery life and what the sensors cover. Which phone is in your pocket settles most of this before you look at a single spec.
Key Differences
- Battery: The Galaxy Watch9 is rated for 40 hours (1.7 days). The Series 12 is rated for 24 hours (1.0 days).
- GPS: The Galaxy Watch9 uses multi-band GPS. The Series 12 uses single-band GPS.
- Storage: The Series 12 has 64GB. The Galaxy Watch9 has 32GB.
- Body data: The Galaxy Watch9 includes bioelectrical impedance (BIA). The Series 12 does not list it.
- Water gear: The Series 12 adds a 6 m depth gauge and a water temperature sensor. Samsung lists neither.
- Price: The Series 12 starts at $399. The Galaxy Watch9 (40mm) starts at $379.99.
Deep Dive Comparison
Design & Comfort
The Series 12 comes in aluminum, titanium and ceramic. Apple lists its weight as 31.5 to 52.9 g, depending on case size and material. The test spec sheet lists a 46 mm case, and you should expect the upper half of that range from a larger titanium model. Apple’s display is always-on LTPO3 OLED at 416 x 496 pixels on the 46mm (374 x 446 on the 42mm).
The Galaxy Watch9 reviewed here is the 40mm model in Armor Aluminum 2, at 31.5 g. That matches the lightest Series 12 and is a real advantage for sleep tracking and smaller wrists. The Super AMOLED display is 1.34 inches at 438 x 438 pixels.
Battery Life
Samsung rates the Galaxy Watch9 at 40 hours of smartwatch use, or 1.7 days. Apple rates the Series 12 at 24 hours, or 1.0 days. No GPS-specific battery figures were provided for either watch, so treat these as everyday numbers.
In practice, the Galaxy Watch9 gives you slack. You can wear it overnight for sleep tracking and still start the next morning with charge left. The Series 12 asks for a daily top-up, and a late-night charging habit is the price of sleep data.
Health & Fitness Features
Both watches track heart rate, blood oxygen and skin or body temperature. The Series 12 adds a second-generation electrical heart sensor, an always-on altimeter, a high-g accelerometer and a compass. Divers and swimmers get a depth gauge (6 m) and a water temperature sensor.
The Galaxy Watch9 lists a BioActive sensor with optical heart rate, ECG and BIA, plus SpO2, skin temperature, a barometer and a geomagnetic sensor. BIA is the standout: it lets the watch estimate body composition from your wrist, which Apple’s sensor list does not cover.
For runners and cyclists, GPS type is the bigger split. The Galaxy Watch9’s multi-band GPS is built to hold a cleaner track around tall buildings and tree cover. The Series 12’s single-band GPS handles open roads fine, but it has the weaker hardware for tough routes.
Smart Features
Both watches support NFC payments, Wi-Fi and cellular models. The Series 12 adds Ultra Wideband (2nd gen), Bluetooth 5.3, Wi-Fi 4 and 5G RedCap on cellular versions. The Galaxy Watch9 has Bluetooth 6.0, dual-band Wi-Fi and LTE on select models, along with a built-in mic and speaker.
The Series 12’s 64GB of storage doubles the Galaxy Watch9’s 32GB. That helps if you load offline music or podcasts for runs without your phone. Each watch works best inside its own phone ecosystem: the Series 12 with an iPhone, the Galaxy Watch9 with an Android phone.
Price & Value
The Series 12 launched at $399 and the Galaxy Watch9 (40mm) at $379.99, a gap of about $19. For that money, Samsung gives you 16 more hours of battery, multi-band GPS and BIA. Apple gives you double the storage, a depth gauge and a wider case and material lineup. Street prices can move, so check the current listing before you buy.
Technical Specs
| Spec | Apple Watch Series 12 | Samsung Galaxy Watch9 (40mm) |
|---|---|---|
| Launch Price | $399 | $379.99 |
| Release Date | 2026-09-18 | 2026-08-07 |
| Case Size | 46 mm (42 mm also offered) | 40 mm |
| Weight | 31.5 to 52.9 g, depending on size and case material | 31.5 g |
| Case Material | Aluminum, Titanium, Ceramic | Armor Aluminum 2 |
| Water Rating | 50 m (ISO 22810:2010), IP6X dust resistance | 5 ATM |
| Display | Always-on LTPO3 OLED Retina, 416 x 496 pixels (46mm) | 1.34-inch Super AMOLED, 438 x 438 pixels |
| Battery (Smartwatch) | 24 hours (1.0 days) | 40 hours (1.7 days) |
| GPS | Single-band | Multi-band |
| Storage | 64GB | 32GB |
| Connectivity | Wi-Fi 4, Bluetooth 5.3, Ultra Wideband (2nd gen), 5G RedCap and LTE (cellular models) | Bluetooth 6.0, Wi-Fi (2.4GHz + 5GHz), NFC, LTE (select models) |
| NFC Payments | Yes | Yes |
| Sensors | Electrical heart sensor (2nd gen), optical heart sensor, blood oxygen, temperature, compass, always-on altimeter, high-g accelerometer, gyroscope, ambient light, depth gauge (6 m), water temperature | BioActive (optical HR, ECG, BIA), SpO2, skin temperature, accelerometer, gyroscope, barometer, geomagnetic, ambient light |
The Verdict
The Samsung Galaxy Watch9 is the better watch on the numbers. It costs less, lasts 40 hours against 24, has multi-band GPS and adds BIA body composition tracking. If you use an Android phone, buy it and skip the rest of this page.
Buy the Apple Watch Series 12 if you carry an iPhone. It gives you 64GB of storage, a depth gauge, Ultra Wideband and 5G RedCap on cellular models. Plan on charging it every day, and pick the case size and material carefully, since the weight swings from 31.5 to 52.9 g.
Frequently Asked Questions
Which is better, the Apple Watch Series 12 or the Galaxy Watch9?
The Galaxy Watch9 wins on battery life, GPS hardware and price. The Series 12 wins on storage and water sensors. Pick the one that matches your phone, because each watch works best with its own platform.
Which watch has the longer battery life?
The Galaxy Watch9 is rated for 40 hours (1.7 days), and the Series 12 for 24 hours (1.0 days). That is 16 hours more per charge on the Samsung. It decides whether you can wear the watch to bed without a mid-day top-up.
Is the Series 12 worth paying $19 more than the Galaxy Watch9?
Only if you use an iPhone or want the depth gauge and 64GB of storage. Otherwise the $379.99 Galaxy Watch9 gives you longer battery life, multi-band GPS and body composition tracking for less money.
Can I use the Galaxy Watch9 with an iPhone, or the Series 12 with Android?
Not well. The Series 12 is built for iPhone and the Galaxy Watch9 is built for Android phones. Match the watch to your phone before you compare anything else.
Which watch is better for runners?
The Galaxy Watch9. Multi-band GPS handles tall buildings and tree cover better than single-band, and the longer battery gets you through more training days between charges. iPhone runners should still buy the Series 12 and accept the weaker GPS hardware.
🏆 Ready to Decide?
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Specs and features may change. Always verify details on the manufacturer’s official site before purchasing.
