Apple Watch SE (3rd gen) Aluminum 45mm
S10 SiP · Aluminum 45mm · 2025
Apple Watch Ultra 3
S11 SiP · 49 mm titanium · Satellite
Apple Watch Ultra 3 takes it — here’s why.
In our weighted Specdex score, Apple Watch SE (3rd gen) Aluminum 45mm lands at 83 and Apple Watch Ultra 3 at 95. That puts Apple Watch Ultra 3 ahead by 12 points — a decisive margin driven mostly by its strengths in the categories below.
Pick Apple Watch SE (3rd gen) Aluminum 45mm if…
- ✓Satellite connectivity (Ultra 3)
- ✓Blood pressure trends (Series 11)
- ✓watchOS 12
Pick Apple Watch Ultra 3 if…
- ✓Satellite connectivity for emergency SOS off-grid
- ✓New blood-pressure trends
- ✓Action Button gets gesture support
Score breakdown
Specs side-by-side
| Spec | Apple Watch SE (3rd gen) Aluminum 45mm | Apple Watch Ultra 3 |
|---|---|---|
| Chip | S10 SiP | Apple S11 SiP |
| Case | Aluminum 45mm | — |
| Release year | 2025 | 2025 |
| Display | — | 49 mm LTPO OLED, 3000 nits |
| Battery | — | 48 h (96 h low-power) |
| Water | — | 100 m |
Apple Watch SE (3rd gen) Aluminum 45mm
- +Satellite connectivity (Ultra 3)
- +Blood pressure trends (Series 11)
- +watchOS 12
- −iPhone-required
- −Battery ~18 h on Series, ~48 h on Ultra
- −Premium pricing
Apple Watch Ultra 3
- +Satellite connectivity for emergency SOS off-grid
- +New blood-pressure trends
- +Action Button gets gesture support
- −~48 h battery still
- −Expensive
- −Large case
FAQ: Apple Watch SE (3rd gen) Aluminum 45mm vs Apple Watch Ultra 3
Which is better, Apple Watch SE (3rd gen) Aluminum 45mm or Apple Watch Ultra 3? +
Apple Watch Ultra 3 scores 95 on our weighted rubric — ahead by 12. Your best pick depends on the sub-scores above.
Is Apple Watch SE (3rd gen) Aluminum 45mm worth the price? +
At $249, Apple Watch SE (3rd gen) Aluminum 45mm delivers a Specdex score of 83 — strongest in health.
Is Apple Watch Ultra 3 worth the price? +
At $799, Apple Watch Ultra 3 delivers a Specdex score of 95 — strongest in health.
Does Apple Watch SE (3rd gen) Aluminum 45mm or Apple Watch Ultra 3 last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.