Performance
- Apple Watch Ultra 2
- Apple S9; 4-core Neural Engine processor
- Apple Watch Series 12 46mm
- Apple S11 chip; 4-core Neural Engine processor
Watch comparison
Apple Ultra 2 vs Apple Series 12 46mm
Compare battery life, health tracking, display and fit.
01Selected  Apple Watch Ultra 2
KSh 103,500In Stock | 02  Apple Watch Series 12 46mm
KSh 70,000In Stock |
|---|
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2 of 4 products
Our quick verdict
The Apple Watch Ultra 2 lasts longer between charges (36 hours vs 24 hours), has a brighter screen for outdoor use and is rated for free diving to 40 m, while the Apple Watch Series 12 46mm gives daily readiness scores, is lighter to wear all day and has faster recharging (30 minutes).
Software
- Apple Watch Ultra 2
- Runs watchOS 10, upgradable to watchOS 27
- Apple Watch Series 12 46mm
- Runs watchOS 27
Battery life
- Apple Watch Ultra 2
- Up to 36 hours per charge
- Apple Watch Series 12 46mm
- Up to 24 hours per charge
Portability
- Apple Watch Ultra 2
- 61.4 g
- Apple Watch Series 12 46mm
- 39.5 g
Water resistance
- Apple Watch Ultra 2
- 100 m under ISO 22810:2010
- Apple Watch Series 12 46mm
- 50 m swimproof under ISO 22810:2010
Key differences
The main differences to help you choose.
Apple Watch Ultra 2
- Longer battery life: up to 36 hours (vs 24 hours).
- Rated for up to 36 hours per charge (vs 24).
- Brighter display: up to 3,000 nits (vs 2,000).
- Rated for free diving to 40 m.
Apple Watch Series 12 46mm
- Lighter: 39.5 g (vs 61.4 g).
- Daily readiness scores.
- Recharges faster: 30 minutes (vs 1 hour).
- Blood-pressure (hypertension) notifications.
- Slimmer: 9.7 mm thick (vs 12 mm).
- Newer model: released in 2026 (vs 2023).
What matters most to you?
6 priorities selected.
| Priority | Apple Watch Ultra 2 | Apple Watch Series 12 46mm |
|---|---|---|
| Battery life | Up to 36 hours per charge | Up to 24 hours per charge |
| Portability | 61.4 g | 39.5 g |
| Storage | 64 GB storage | 64 GB storage |
| Display | OLED display, 326 ppi | OLED display, 326 ppi |
| Performance | Apple S9 processor | Apple S11 chip processor |
| Software | watchOS 10 | watchOS 27 |
| Connections | Wi-Fi 4, Bluetooth 5.3 | Wi-Fi 4, Bluetooth 5.3 |
| Water resistance | 100 m under ISO 22810:2010 | 50 m swimproof under ISO 22810:2010 |
| Sensors | Blood oxygen sensor, electrical heart sensor | High-g accelerometer, high dynamic-range gyroscope |
| Sleep tracking | Sleep duration and sleep stages | Sleep duration and stages, sleep score |
| Charging | Magnetic fast charging | Fast-charge capable |
| Peak brightness | Up to 3,000 nits, 1 nit minimum | Up to 2,000 nits peak |
| Speaker | Dual speakers, siren | Speaker with media playback |
| Durability / certifications | IP6X dust resistance, MIL-STD-810H | IP6X dust resistance |
| Ultra wideband (UWB) | Ultra Wideband (UWB) support (gen2 chip) | Second-generation Ultra Wideband chip |
Tick a topic above to see how each product answers it.
Detailed comparison
Explore the full specifications, section by section.
These products have the same published specifications.
Similarities
- Both belong to the Apple Watch platform.
- Both support Wi-Fi 4.
- Both use Bluetooth 5.3.
- Both work with a companion app.
- Both have NFC.
- Both take ECG readings.
In summary
Get the Apple Watch Ultra 2 if you want longer battery life and a brighter screen for outdoor use, or the Apple Watch Series 12 46mm if you would rather have daily readiness scores and a lighter watch for all-day wear.
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