Garmin Venu 4 vs Apple Watch SE 3: 12-Day Battery or Apple Ecosystem?

The Garmin Venu 4 and Apple Watch SE 3 both launched in September 2025, but they’re built for very different people. One is a premium fitness powerhouse with marathon-grade battery life; the other is a polished smartwatch that puts Apple’s ecosystem on your wrist for half the price. Here’s how they actually compare where it matters.

Key Differences

• Battery life is night and day: The Venu 4 lasts up to 12 days in smartwatch mode vs. roughly 18 hours on the SE 3. For GPS activities, Garmin delivers 20 hours compared to Apple’s 7.
• GPS accuracy: The Venu 4 uses multi-band GPS for superior route tracking in dense urban areas and under tree cover. The SE 3 relies on single-band GPS, which is adequate but less precise.
• Ecosystem lock-in: The Apple Watch SE 3 works exclusively with iPhones. The Garmin Venu 4 pairs with both Android and iOS devices.
• Price gap: At $249, the SE 3 costs less than half the Venu 4’s $549.99 launch price — a $300 difference.
• LTE option: Only the Apple Watch SE 3 offers optional cellular connectivity, letting you leave your phone behind entirely.
• Advanced fitness metrics: The Venu 4 includes Pulse Ox monitoring, a thermometer, and Garmin’s full training load and recovery suite. The SE 3 covers the basics but lacks blood oxygen readings and advanced training analytics.
• Storage: The SE 3 offers 64GB of onboard storage vs. 8GB on the Venu 4 — a big advantage for offline music and apps.

Deep Dive Comparison

Design & Comfort

The Garmin Venu 4 features a 45mm case made from stainless steel and fiber-reinforced polymer, giving it a premium feel with solid durability. At 56g, it’s noticeably heavier on the wrist than the Apple Watch SE 3, which tips the scales at just 32.9g thanks to its all-aluminum 44mm case. If you’re sensitive to weight during sleep tracking or long runs, that 23g difference is real.

The SE 3 has the edge in display size with a 1.78-inch Always-On Retina LTPO OLED panel versus the Venu 4’s 1.4-inch AMOLED screen. Both displays are sharp and vibrant, but the Apple Watch’s larger, rectangular display fits more information at a glance and makes text easier to read. The Venu 4’s circular face looks more like a traditional watch, which some users prefer aesthetically.

Both watches carry a 5 ATM / 50-meter water resistance rating, so swimming and showering are fair game with either device.

Battery Life

This is where the Garmin Venu 4 dominates the conversation. With up to 288 hours (12 days) in smartwatch mode and 20 hours of continuous GPS tracking, it’s built for people who hate charging their watch. The Apple Watch SE 3 maxes out at roughly 18 hours of general use and about 7 hours with GPS running — meaning you’ll need to charge it every single night.

For weekend warriors who do long hikes, ultra runs, or multi-day camping trips, the Venu 4’s endurance is a game-changer. The SE 3 works fine for daily 30- to 60-minute workouts, but it won’t survive a marathon without careful battery management.

Health & Fitness Features

The Garmin Venu 4 packs Garmin’s Elevate Gen 5 heart rate sensor alongside Pulse Ox (blood oxygen), a barometric altimeter, compass, thermometer, and full gyroscope/accelerometer suite. You get access to Garmin’s deep ecosystem of training metrics: Training Readiness, Body Battery, HRV Status, VO2 Max estimates, recovery advisors, and dozens of built-in sport profiles. For data-driven athletes, this is the gold standard.

The Apple Watch SE 3 comes with a 2nd-generation optical heart sensor, temperature sensor, always-on altimeter, and high-g accelerometer with gyroscope. It handles heart rate zones, workout detection, and basic fitness metrics well. Apple’s Health app is polished and easy to navigate, and you get fall detection and crash detection as safety features. However, the SE 3 lacks blood oxygen monitoring and the advanced training analytics that serious athletes rely on.

Both watches deliver reliable heart rate tracking for everyday workouts. The difference shows up when you need granular performance data — training load trends, recovery windows, and race predictions — where Garmin pulls far ahead.

Smart Features

The Apple Watch SE 3 wins the smartwatch side convincingly. With deep iPhone integration, you get iMessage, phone calls, Siri, Apple Pay, the full App Store, and optional LTE for phone-free connectivity. The 64GB of storage means plenty of room for offline music via Apple Music or Spotify, apps, and media.

The Garmin Venu 4 supports Bluetooth calls (with mic and speaker), Garmin Pay for contactless payments, music storage, and smartphone notifications from both iOS and Android. But with 8GB of storage and no cellular option, it can’t match the SE 3’s versatility as a standalone smart device. Garmin’s Connect IQ app store also has a smaller selection compared to Apple’s watchOS ecosystem.

If you want a watch that can genuinely replace your phone for quick errands, the Apple Watch SE 3 (especially the LTE model) is the clear pick.

Price & Value

The Apple Watch SE 3 launches at $249, making it one of the most affordable full-featured smartwatches on the market. The Garmin Venu 4 at $549.99 costs more than double. That’s a significant gap.

However, value depends on what you’re buying it for. If you need a competent daily smartwatch with solid health basics and seamless iPhone integration, the SE 3 is outstanding value. If you’re an endurance athlete who needs multi-day battery, multi-band GPS accuracy, and professional-grade training data, the Venu 4 justifies its premium — you’d otherwise need a separate Garmin running watch plus a smartwatch, which would cost more combined.

Technical Specs

Spec	Garmin Venu 4	Apple Watch SE 3
Price	$549.99	$249
Case Size	45mm	44mm
Weight	56g	32.9g
Display	1.4″ AMOLED (454 x 454)	1.78″ Always-On LTPO OLED (368 x 448)
Battery (Smartwatch)	Up to 12 days	Up to 18 hours
Battery (GPS)	Up to 20 hours	Up to 7 hours
GPS	Multi-band	Single-band
Water Rating	5 ATM	50 meters
Storage	8GB	64GB
Connectivity	Bluetooth, ANT+, Wi-Fi	LTE (optional), Wi-Fi 4, Bluetooth 5.3
Key Sensors	Elevate Gen 5 HR, Pulse Ox, Thermometer, Barometric Altimeter	Optical HR (2nd gen), Temperature, Always-on Altimeter
NFC Payments	Garmin Pay	Apple Pay
Case Material	Stainless steel / fiber-reinforced polymer	Aluminum

The Verdict

Buy the Garmin Venu 4 if you’re a dedicated athlete who trains regularly and wants a watch that can keep up. If you run ultramarathons, do long bike rides, hike for days, or simply refuse to charge your watch every night, the Venu 4’s 12-day battery and multi-band GPS are worth the premium. It’s also the better choice if you use an Android phone, since the Apple Watch isn’t an option at all.

Buy the Apple Watch SE 3 if you’re an iPhone user who wants a well-rounded smartwatch at an excellent price. For everyday health tracking, notifications, Apple Pay, and the convenience of optional LTE — all at $249 — it’s hard to beat. Casual gym-goers and fitness beginners will find everything they need here without paying for advanced metrics they won’t use.

The bottom line: These watches serve different masters. The Garmin Venu 4 is a fitness tool that happens to be smart. The Apple Watch SE 3 is a smartwatch that happens to track fitness. Pick the one that matches what you’ll actually use it for most.