Apple Watch SE (3rd gen) Stainless 45mm
S10 SiP · Stainless 45mm · 2025
Apple Watch Ultra 3
S10 chip · 49 mm titanium · 3000 nits
Apple Watch Ultra 3 takes it — here’s why.
In our weighted Specdex score, Apple Watch SE (3rd gen) Stainless 45mm lands at 83 and Apple Watch Ultra 3 at 94. That puts Apple Watch Ultra 3 ahead by 11 points — a decisive margin driven mostly by its strengths in the categories below.
Pick Apple Watch SE (3rd gen) Stainless 45mm if…
- ✓Satellite connectivity (Ultra 3)
- ✓Blood pressure trends (Series 11)
- ✓watchOS 12
Pick Apple Watch Ultra 3 if…
- ✓49 mm titanium chassis
- ✓3000 nit peak display
- ✓Up to 42 hours normal use
Winner by scenario
Derived from the sub-score breakdown · not a separate testHealth
TieCompared on the health sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Display
TieCompared on the display sub-score
Effectively tied — neither pulls a 2-point weighted lead.
Fitness
Apple Watch Ultra 3Compared on the fitness sub-score
Apple Watch Ultra 3 leads on fitness (96 vs 94).
Value for money
Apple Watch SE (3rd gen) Stainless 45mmSpecdex score per dollar at MSRP
Apple Watch SE (3rd gen) Stainless 45mm more score per dollar ($449 vs $799).
Score breakdown
Specs side-by-side
| Spec | Apple Watch SE (3rd gen) Stainless 45mm | Apple Watch Ultra 3 |
|---|---|---|
| Chip | S10 SiP | Apple S10 chip |
| Case | Stainless 45mm | 49 mm titanium |
| Release year | 2025 | — |
| Display | — | Up to 3000 nits |
| Water resistance | — | 100 m (ISO 22810:2010) |
| Battery | — | Up to 42 hours; up to 72 hours in Low Power Mode |
| Starting price | — | $799 |
Apple Watch SE (3rd gen) Stainless 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
- +49 mm titanium chassis
- +3000 nit peak display
- +Up to 42 hours normal use
- −Same chassis as Ultra 2
- −Expensive at $799
- −Battery only extends to 72 h in low-power
FAQ: Apple Watch SE (3rd gen) Stainless 45mm vs Apple Watch Ultra 3
Which is better, Apple Watch SE (3rd gen) Stainless 45mm or Apple Watch Ultra 3? +
Apple Watch Ultra 3 scores 94 on our weighted rubric — ahead by 11. Your best pick depends on the sub-scores above.
Is Apple Watch SE (3rd gen) Stainless 45mm worth the price? +
At $449, Apple Watch SE (3rd gen) Stainless 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 94 — strongest in display.
Does Apple Watch SE (3rd gen) Stainless 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.
Which is better for fitness, Apple Watch SE (3rd gen) Stainless 45mm or Apple Watch Ultra 3? +
Apple Watch Ultra 3 — leads on fitness (96 vs 94). Compared on the fitness sub-score.
Which is the better value, Apple Watch SE (3rd gen) Stainless 45mm or Apple Watch Ultra 3? +
Apple Watch SE (3rd gen) Stainless 45mm — more score per dollar ($449 vs $799). Specdex score per dollar at MSRP.