Smartwatches / Fitbit Sense 2 vs Apple Watch SE 3 (40mm, GPS, Aluminum)
Fitbit Sense 2 vs Apple Watch SE 3 (40mm, GPS, Aluminum)
Apple Watch SE 3 (40mm, GPS, Aluminum)
FDA-cleared heart features for $249 — the best-value Apple Watch, with the worst battery here.
Wins overall by 0.7 points
Quick Verdict
A 0.7-point gap makes the Apple Watch SE 3 (40mm, GPS, Aluminum) the straightforward choice here. FDA-cleared heart features for $249 — the best-value Apple Watch, with the worst battery here.
The Fitbit Sense 2 and Apple Watch SE 3 (40mm, GPS, Aluminum) are both closely matched smartwatch models, and they're priced almost identically ($249.95 vs $249). On App Ecosystem, the Apple Watch SE 3 (40mm, GPS, Aluminum) leads (10.0 vs 1.5/10) — whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps. On Ecosystem Freedom, the Fitbit Sense 2 leads (9.0 vs 1.0/10) — 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. On Value, the Apple Watch SE 3 (40mm, GPS, Aluminum) leads (9.0 vs 5.0/10) — what you get for the money once LTE upcharges and subscriptions are counted in. Overall, the Apple Watch SE 3 (40mm, GPS, Aluminum) scores 7.0/10 across our 8 scoring categories versus 6.3/10 for the Fitbit Sense 2. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Fitbit Sense 2 | Apple Watch SE 3 (40mm, GPS, Aluminum) |
|---|---|---|
| Price | $249.95 | $249.00 |
| Release Year | 2022 | 2025 |
| Phone Compatibility | Both iOS and Android — Google states most phones running Android 11.0 or iOS 16.4 or newer. A Google Account and internet access are required for full functionality. No feature is gated to a Pixel phone. | iPhone only. Requires iPhone 11 or later running iOS 26 or later. No Android support of any kind. |
| Claimed Battery Life (hrs) | 144✓ | 18 |
| What the Battery Claim Assumes | Google's '6+ day' claim assumes the always-on display OFF and GPS used sparingly. Turning on the always-on display or tracking daily GPS runs pulls it well below a week; overnight sleep tracking is included in the claim, unlike Apple's. | 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. |
| Case Size (mm) | 41 | 40 |
| Display | 1.58-inch AMOLED with an optional always-on mode. Peak brightness is not published by Google. | LTPO OLED, always-on (new to the SE line), up to 1000 nits |
| Operating System | Fitbit OS (proprietary) | watchOS 26 |
| Third-Party Apps | Effectively none. Google shut Fitbit Studio in 2023, leaving Sense 2 and Versa 4 with third-party WATCH FACES but no third-party apps, and third-party faces and apps were pulled entirely for EU users in 2024. Fitbit OS is a closed platform with a shrinking gallery. | Full on-device App Store — identical native watchOS catalogue to Series 11 and Ultra 3 |
| Health Features Enabled in the US | ECG app with AFib detection and irregular rhythm notifications, SpO2, skin temperature and the continuous cEDA stress sensor are all available in the US. There is no blood pressure and no hypertension notification. | 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. |
| Subscription Wall | The heaviest subscription wall here. The Fitbit app is now the Google Health app; Google Health Premium (3 months included, then paid) gates the Daily Readiness Score, the on-demand workout library and the Google Health Coach. Raw steps, heart rate, sleep stages and ECG remain free. | None required; Apple Fitness+ ($9.99/mo) is optional. |
| LTE Option | None — no cellular variant of Sense 2 exists. | 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. |
| Water & Dust Rating | Water resistant to 50 m | 50 m water resistant (WR50), IP6X dust resistant |
| Battery Replacement | Google does not offer battery replacement for Fitbit watches; a degraded battery means a replacement device. | Apple out-of-warranty battery service is a flat $99 — over a third of the watch's price. |
| Warranty | 12 months | 12 months |
| Colors | Shadow Grey / Graphite | Midnight, Starlight |
Category Scores
Battery Life
The Fitbit Sense 2 leads clearly here, 8.0 against 4.5 — a 3.5-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 SE 3 (40mm, GPS, Aluminum) leads clearly here, 8.8 against 7.4 — a 1.4-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 Fitbit Sense 2 does not close the gap elsewhere.
Fitness & GPS
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 7.8 against 6.4 — a 1.4-point margin on workout tracking, GPS accuracy, sport modes and training analysis. If that is what you are buying for, the Fitbit Sense 2 does not close the gap elsewhere.
Ecosystem Freedom
The Fitbit Sense 2 leads clearly here, 9.0 against 1.0 — a 8.0-point margin on 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. If that is what you are buying for, the Apple Watch SE 3 (40mm, GPS, Aluminum) does not close the gap elsewhere.
App Ecosystem
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 10.0 against 1.5 — a 8.5-point margin on whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps. If that is what you are buying for, the Fitbit Sense 2 does not close the gap elsewhere.
Display
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 7.4 against 6.4 — a 1.0-point margin on panel type, brightness, always-on behaviour and legibility in sunlight. If that is what you are buying for, the Fitbit Sense 2 does not close the gap elsewhere.
Build & Durability
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 7.6 against 6.6 — a 1.0-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 Fitbit Sense 2 does not close the gap elsewhere.
Value
The Apple Watch SE 3 (40mm, GPS, Aluminum) leads clearly here, 9.0 against 5.0 — a 4.0-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 Fitbit Sense 2 does not close the gap elsewhere.
Best For
Choose the Fitbit Sense 2 if…
- • Ecosystem Freedom matters most to you — the Fitbit Sense 2 scores 9.0/10 here (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).
- • Battery Life matters most to you — the Fitbit Sense 2 scores 8.0/10 here (real endurance between charges, judged against what the claim actually assumes rather than the headline number).
- • Your main use case is android or heart-health.
Choose the Apple Watch SE 3 (40mm, GPS, Aluminum) if…
- • App Ecosystem matters most to you — the Apple Watch SE 3 (40mm, GPS, Aluminum) scores 10.0/10 here (whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps).
- • 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).
- • Health Tracking matters most to you — the Apple Watch SE 3 (40mm, GPS, Aluminum) scores 8.8/10 here (depth of heart, sleep and body metrics that are genuinely enabled and cleared for use in the US).
Pros & Cons
Fitbit Sense 2
Pros
- +Works properly on both iPhone and Android with nothing gated by phone brand
- +The cEDA continuous stress sensor is genuinely unique in this comparison
- +ECG plus six days of battery, which no Apple or Samsung watch gets close to
- +Google is still selling and discounting it — around $200 direct — four years after launch
Cons
- −Daily Readiness Score, the workout library and Google Health Coach all sit behind Google Health Premium once the 3-month trial ends
- −No third-party apps at all — Fitbit Studio was shut in 2023 and EU users lost third-party faces too
- −2022 hardware at a $249.95 list price, sold beside a $249 Apple Watch SE 3 with newer silicon
- −No blood pressure, no hypertension notifications, no LTE
- −Google will not replace the battery
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
Shop by Need
FAQs
Is the Fitbit Sense 2 or Apple Watch SE 3 (40mm, GPS, Aluminum) better overall?+
Based on our 8-category scoring, the Apple Watch SE 3 (40mm, GPS, Aluminum) 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 App Ecosystem, the Fitbit Sense 2 or the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) scores higher on App Ecosystem (10.0/10 vs 1.5/10) — whether there is a real third-party app store on the wrist or a handful of proprietary mini-apps.
Which is better for Ecosystem Freedom, the Fitbit Sense 2 or the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Fitbit Sense 2 scores higher on Ecosystem Freedom (9.0/10 vs 1.0/10) — 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.
Which is better for Value, the Fitbit Sense 2 or the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) scores higher on Value (9.0/10 vs 5.0/10) — what you get for the money once LTE upcharges and subscriptions are counted in.
Which is better for Battery Life, the Fitbit Sense 2 or the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Fitbit Sense 2 scores higher on Battery Life (8.0/10 vs 4.5/10) — real endurance between charges, judged against what the claim actually assumes rather than the headline number.
Is the Fitbit Sense 2 worth the price difference over the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Apple Watch SE 3 (40mm, GPS, Aluminum) is the cheaper option at $249 versus $249.95. Whether the pricier model is "worth it" depends on how much you value its lead in App Ecosystem.
Which is better suited to my use case?+
The Fitbit Sense 2 is the better fit if you mainly care about android or heart-health. The Apple Watch SE 3 (40mm, GPS, Aluminum) is the better fit for iphone.
What's the warranty on the Fitbit Sense 2 vs the Apple Watch SE 3 (40mm, GPS, Aluminum)?+
The Fitbit Sense 2 ships with a 12-month warranty; the Apple Watch SE 3 (40mm, GPS, Aluminum) 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
Apple Watch SE 3 (40mm, GPS, Aluminum) — $249.00
Premium Option
Fitbit Sense 2 — $249.95
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.