Smartwatches / Apple Watch SE 3 (40mm, GPS, Aluminum) vs Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
Apple Watch SE 3 (40mm, GPS, Aluminum)
$249.00
VSApple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
$799.00
Apple Watch SE 3 (40mm, GPS, Aluminum) vs Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
Satellite SOS, 42-hour battery and a depth gauge — Apple's only watch that lasts a weekend.
Wins overall by 1.0 points
Quick Verdict
A 1.0-point gap makes the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) the straightforward choice here. Satellite SOS, 42-hour battery and a depth gauge — Apple's only watch that lasts a weekend.
The Apple Watch SE 3 (40mm, GPS, Aluminum) and Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) are both current-generation smartwatch models, and the Apple Watch SE 3 (40mm, GPS, Aluminum) is $550 cheaper than the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) ($249 vs $799). On Battery Life, the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads (7.5 vs 4.5/10) — real endurance between charges, judged against what the claim actually assumes rather than the headline number. On Display, the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads (9.8 vs 7.4/10) — panel type, brightness, always-on behaviour and legibility in sunlight. On Value, the Apple Watch SE 3 (40mm, GPS, Aluminum) leads (9.0 vs 6.8/10) — what you get for the money once LTE upcharges and subscriptions are counted in. Overall, the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores 8.0/10 across our 8 scoring categories versus 7.0/10 for the Apple Watch SE 3 (40mm, GPS, Aluminum). Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Apple Watch SE 3 (40mm, GPS, Aluminum) | Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) |
|---|---|---|
| Price | $249.00 | $799.00 |
| Release Year | 2025 | 2025 |
| Phone Compatibility | iPhone only. Requires iPhone 11 or later running iOS 26 or later. No Android support of any kind. | iPhone only. Requires iPhone 11 or later on iOS 26. Satellite features additionally require the watch to be out of cellular range, and are US/Canada-region dependent. |
| Claimed Battery Life (hrs) | 18 | 42✓ |
| What the Battery Claim Assumes | Apple's 18 h figure assumes the same mixed-use day as Series 11 (90 time checks, 90 notifications, 15 min app use, 60 min workout) with the always-on display active and no LTE. Add overnight sleep tracking and you are charging twice a day. | Apple's 42 h figure assumes the always-on display active and a mixed-use day with one workout; 72 h is Low Power Mode with the always-on display disabled and some sensors throttled. Multi-hour GPS workouts and satellite use pull it down sharply. |
| Case Size (mm) | 40 | 49 |
| Display | LTPO OLED, always-on (new to the SE line), up to 1000 nits | LTPO3 wide-angle OLED, always-on, up to 3000 nits |
| Operating System | watchOS 26 | watchOS 26 |
| Third-Party Apps | Full on-device App Store — identical native watchOS catalogue to Series 11 and Ultra 3 | Full on-device App Store — the same native watchOS catalogue as Series 11, plus dive and outdoor apps that use the depth sensor |
| Health Features Enabled in the US | Live in the US: ECG, irregular rhythm notifications, sleep apnea notifications and hypertension notifications (FDA-cleared), plus wrist temperature. Blood Oxygen uses the same post-Masimo design as Series 11 — captured on the watch, calculated on the iPhone. There is no depth gauge and no skin-temperature-driven ovulation estimate beyond what Series 11 offers. | Live in the US: ECG, irregular rhythm notifications, sleep apnea notifications and hypertension notifications (all FDA-cleared), plus wrist temperature and a depth gauge. Blood Oxygen is the post-Masimo redesign — sampled on the watch, computed on the iPhone. |
| Subscription Wall | None required; Apple Fitness+ ($9.99/mo) is optional. | None required. Satellite features are included with the hardware, not sold as a subscription. |
| LTE Option | Separate SKU: Apple lists SE 3 GPS + Cellular at a $50 upcharge and it needs its own carrier line. The cellular 40mm has repeatedly been discounted to $249.99 at Amazon, closing the gap. | Not an option — 5G cellular is included in every Ultra 3 and is part of the $799 price. A carrier line is still required and billed separately. |
| Water & Dust Rating | 50 m water resistant (WR50), IP6X dust resistant | 100 m water resistant (WR100), IP6X dust, EN13319 dive certified to 40 m |
| Battery Replacement | Apple out-of-warranty battery service is a flat $99 — over a third of the watch's price. | Apple out-of-warranty battery service is a flat $99, the same as the aluminium models. |
| Warranty | 12 months | 12 months |
| Colors | Midnight, Starlight | Natural Titanium, Black Titanium |
Category Scores
Battery Life
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads clearly here, 7.5 against 4.5 — a 3.0-point margin on real endurance between charges, judged against what the claim actually assumes rather than the headline number. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
Health Tracking
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads clearly here, 9.6 against 8.8 — a 0.8-point margin on depth of heart, sleep and body metrics that are genuinely enabled and cleared for use in the US. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
Fitness & GPS
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads clearly here, 9.4 against 7.8 — a 1.6-point margin on workout tracking, GPS accuracy, sport modes and training analysis. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
Ecosystem Freedom
The Apple Watch SE 3 (40mm, GPS, Aluminum) and Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) are level here, at 1.0/10 each. the category's trap dimension: how much of the watch still works on a phone other than the maker's own. 10 means full parity on iOS and Android; 1 means one phone brand or nothing is not what separates these two — look to the categories where the scores diverge.
App Ecosystem
The Apple Watch SE 3 (40mm, GPS, Aluminum) and Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) are level here, at 10.0/10 each. whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps is not what separates these two — look to the categories where the scores diverge.
Display
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads clearly here, 9.8 against 7.4 — a 2.4-point margin on panel type, brightness, always-on behaviour and legibility in sunlight. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
Build & Durability
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) leads clearly here, 9.6 against 7.6 — a 2.0-point margin on case and glass materials, water and dust ratings, and how well it survives daily wear. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
Value
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 9.0 against 6.8 — a 2.2-point margin on what you get for the money once LTE upcharges and subscriptions are counted in. If that is what you are buying for, the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) does not close the gap elsewhere.
Best For
Choose the Apple Watch SE 3 (40mm, GPS, Aluminum) if…
- • Value matters most to you — the Apple Watch SE 3 (40mm, GPS, Aluminum) scores 9.0/10 here (what you get for the money once LTE upcharges and subscriptions are counted in).
- • You want to spend less — it's $550 cheaper.
Choose the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) if…
- • Battery Life matters most to you — the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores 7.5/10 here (real endurance between charges, judged against what the claim actually assumes rather than the headline number).
- • Display matters most to you — the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores 9.8/10 here (panel type, brightness, always-on behaviour and legibility in sunlight).
- • Build & Durability matters most to you — the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores 9.6/10 here (case and glass materials, water and dust ratings, and how well it survives daily wear).
- • Fitness & GPS matters most to you — the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores 9.4/10 here (workout tracking, GPS accuracy, sport modes and training analysis).
- • Your main use case is outdoors or long-battery.
Pros & Cons
Apple Watch SE 3 (40mm, GPS, Aluminum)
Pros
- +Cheapest route to a US-enabled ECG plus hypertension and sleep apnea notifications
- +Same S10 chip and same watchOS 26 as the $399 Series 11 — the gap is display and sensors, not speed
- +Always-on display and fast charging finally arrive on the SE line
- +No subscription gates any metric, unlike the similarly-priced Fitbit Sense 2
Cons
- −18 hours is the shortest battery life of any watch in this comparison
- −1000-nit display is half the brightness of Series 11 and a sixth of Galaxy Watch Ultra2's
- −Aluminum only, two colours only, no titanium and no larger 46mm option
- −iPhone-only — worthless the day you switch to Android
Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)
Pros
- +Best battery of any Apple Watch by a wide margin — 42 h claimed, 72 h in Low Power
- +Satellite messaging works with no phone and no cell signal, which nothing else here offers
- +Titanium and sapphire, 100 m rating and a real depth gauge for the price of a Galaxy Watch Ultra2
- +Cellular is included rather than being a $100 upcharge and a second ASIN
Cons
- −$799 and iPhone-only — the most money you can spend on a watch that one phone switch renders useless
- −49mm and titanium make it genuinely large and heavy on small wrists
- −Even 42 hours is beaten by a $79 Amazfit and a $250 OnePlus
- −Satellite features are region-limited and depend on being outdoors with a clear sky
Shop by Need
FAQs
Is the Apple Watch SE 3 (40mm, GPS, Aluminum) or Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) better overall?+
Based on our 8-category scoring, the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Battery Life, the Apple Watch SE 3 (40mm, GPS, Aluminum) or the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores higher on Battery Life (7.5/10 vs 4.5/10) — real endurance between charges, judged against what the claim actually assumes rather than the headline number.
Which is better for Display, the Apple Watch SE 3 (40mm, GPS, Aluminum) or the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores higher on Display (9.8/10 vs 7.4/10) — panel type, brightness, always-on behaviour and legibility in sunlight.
Which is better for Value, the Apple Watch SE 3 (40mm, GPS, Aluminum) or the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) scores higher on Value (9.0/10 vs 6.8/10) — what you get for the money once LTE upcharges and subscriptions are counted in.
Which is better for Build & Durability, the Apple Watch SE 3 (40mm, GPS, Aluminum) or the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) scores higher on Build & Durability (9.6/10 vs 7.6/10) — case and glass materials, water and dust ratings, and how well it survives daily wear.
Is the Apple Watch SE 3 (40mm, GPS, Aluminum) worth the price difference over the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) is the cheaper option at $249 versus $799. Whether the pricier model is "worth it" depends on how much you value its lead in Battery Life.
Which is better suited to my use case?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) is the better fit if you mainly care about iphone. The Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) is the better fit for outdoors or long-battery.
What's the warranty on the Apple Watch SE 3 (40mm, GPS, Aluminum) vs the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) ships with a 12-month warranty; the Apple Watch Ultra 3 (49mm, GPS + Cellular, Titanium) ships with a 12-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Cheaper Option
Amazfit Bip 6 (46mm) — $79.99
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.