Apple Watch SE 3 vs Fitbit Versa 4: Ecosystem Lock-In or 6-Day Battery?

The Apple Watch SE 3 and Fitbit Versa 4 sit at similar price points but take very different approaches to what a wrist-worn device should do. One is a full-featured smartwatch that happens to track fitness; the other is a fitness tracker that happens to have smart features. Your choice comes down to whether you value deep smartphone integration or multi-day battery life.

Key Differences

• Battery life: The Fitbit Versa 4 lasts up to 6 days in smartwatch mode versus roughly 18 hours for the Apple Watch SE 3 — that is an 8x difference.
• Ecosystem: The Apple Watch SE 3 is iPhone-only and requires iOS for setup and use. The Fitbit Versa 4 works with both Android and iOS via the Fitbit app.
• Cellular connectivity: The SE 3 offers an optional LTE model for phone-free calls, texts, and streaming. The Versa 4 has no cellular option.
• Display: The SE 3 features an Always-On Retina LTPO OLED at 1.78 inches. The Versa 4 uses a smaller 1.58-inch AMOLED with an always-on display option (though enabling it reduces battery to 2–3 days).
• Storage: The SE 3 packs 64GB of on-device storage compared to just 4GB on the Versa 4, giving it far more room for music, podcasts, and apps.
• Release date: The SE 3 launched in September 2025; the Versa 4 debuted in September 2022, making it nearly three years older.

Deep Dive Comparison

Design & Comfort

Both watches use aluminum cases and share a 50-meter water resistance rating, so either can handle swimming and sweaty workouts. The Apple Watch SE 3 is noticeably lighter at 32.9g compared to the Versa 4’s 37.6g, though the difference is small enough that most people will not feel it during exercise. The SE 3’s 44mm rectangular case houses a larger 1.78-inch display, while the Versa 4’s squircle design at 40.5mm feels more compact on smaller wrists.

Band compatibility is another consideration. Apple’s proprietary band system offers a massive aftermarket ecosystem. Fitbit uses its own quick-release bands, which have fewer third-party options but are easy to swap.

Battery Life

This is where the two watches diverge most dramatically. The Fitbit Versa 4 delivers up to 6 days (144 hours) of battery in normal smartwatch mode and approximately 12 hours with continuous GPS tracking. The Apple Watch SE 3 manages about 18 hours in standard mode and roughly 7 hours with GPS active. If you hate charging your watch daily, the Versa 4 wins this category by a wide margin.

Health & Fitness Features

Both watches cover the fundamentals: optical heart rate monitoring, SpO2 blood oxygen readings (via sensor on the Versa 4), temperature sensing, an altimeter, and an accelerometer for step and activity tracking. GPS is built into both, though the SE 3 uses single-band GPS while the Versa 4 pairs GPS with GLONASS for potentially better satellite lock in dense urban environments.

The Apple Watch SE 3 adds a gyroscope and compass that the Versa 4 lacks, enabling features like fall detection and backtrack navigation. The Fitbit Versa 4 leans on Fitbit’s software ecosystem — including a Daily Readiness Score, Active Zone Minutes, and detailed sleep staging analysis — that many users find more intuitive for pure fitness tracking.

Smart Features

The Apple Watch SE 3 is the stronger smartwatch by a significant margin. It supports Siri, Apple Pay, full notification mirroring with quick replies, standalone apps from the App Store, and optional LTE for leaving your phone at home. With 64GB of storage, you can load a substantial music library or podcast queue directly on the watch.

The Fitbit Versa 4 supports Fitbit Pay (NFC), has a microphone and speaker for Alexa and phone calls (when connected to your phone), and can store music — but with only 4GB of storage, capacity is limited. Its app ecosystem is far smaller than Apple’s, and third-party app support has diminished since Google acquired Fitbit.

Price & Value

At launch, the Apple Watch SE 3 costs $249 and the Fitbit Versa 4 retailed for $230. Given that the Versa 4 is now nearly three years old, street prices have dropped well below its original MSRP, often landing between $130 and $180. At full price, the two are close enough that the decision should be based on features rather than cost. At the Versa 4’s discounted street price, it becomes a compelling value if multi-day battery and cross-platform compatibility matter more to you than deep smartwatch features.

Technical Specs

Spec	Apple Watch SE 3	Fitbit Versa 4
Launch Price	$249	$230
Case Size	44mm	40.5mm
Weight	32.9g	37.6g
Display	1.78″ Always-On LTPO OLED	1.58″ AMOLED
Resolution	368 x 448	336 x 336
Water Rating	50 meters	50 meters
Battery (Smartwatch)	18 hours	6 days
Battery (GPS)	7 hours	12 hours
GPS	Single-band	GPS + GLONASS
Storage	64GB	4GB
NFC Payments	Apple Pay	Fitbit Pay
Connectivity	LTE (opt.), Wi-Fi, BT 5.3	Bluetooth 5.0, NFC
Compatibility	iPhone only	Android & iPhone

The Verdict

Buy the Apple Watch SE 3 if you own an iPhone and want a true smartwatch experience. The Always-On display, Apple Pay, Siri, a massive app ecosystem, optional LTE, and 64GB of storage make it the most capable sub-$250 smartwatch you can strap on. Just accept the daily charging routine.

Buy the Fitbit Versa 4 if you primarily want a fitness tracker with smart extras and do not want to charge your watch every night. Its 6-day battery life, cross-platform support, and Fitbit’s strong health-tracking software make it a solid pick for workout-focused users — especially at its current discounted street prices. Just know that its app ecosystem and smartwatch depth cannot match Apple’s.

The bottom line: The Apple Watch SE 3 is the better smartwatch. The Fitbit Versa 4 is the better fitness-first wearable with superior battery life. If you are on Android, the Versa 4 wins by default. If you are on iPhone and want the most versatile device, the SE 3 is worth the daily charge.