Garmin Venu 4 (45 mm) / Apple Watch Ultra 3

Garmin Venu 4 (45 mm): 010-03014-00 · Slate case / black silicone band

Apple Watch Ultra 3: 49 mm titanium case, GPS + Cellular (A3281); natural or black finish. Ultra 2 and Ultra 4 are separate models.

Specification	Garmin Venu 4 (45 mm)	Apple Watch Ultra 3
Release year	2025	2025
Launch	Announced 17 September 2025; sales began 22 September 2025 Garmin	—
Display	1.4-inch AMOLED; 454 × 454; touch, optional always-on mode Garmin	Always-On Retina with wide-angle OLED and LTPO3; 422 × 514 pixels, 326 ppi; 1245 mm² active area; up to 3000 nits, minimum 1 nit Apple says the wide-angle OLED pixels emit light at wider angles, so the screen stays readable without fully turning the wrist. LTPO3 allows thinner borders and lets the always-on mode refresh once per second, so a seconds hand is visible without raising the wrist. The 1-nit minimum reduces glare in the dark. Apple
Cover glass	Corning Gorilla Glass 3 Garmin	—
Case and band	Stainless steel / fibre-reinforced polymer; 22 mm quick-release band Garmin	—
Weight	38 g case; 56 g with silicone band Garmin	—
Storage	8 GB; music storage Garmin	—
Positioning	Multi-GNSS, multi-band GPS and SatIQ automatic selection Garmin	—
Battery	Up to 12 days in smartwatch mode; 20 hours GPS-only; 17 hours multi-band Garmin	—
Always-on display	Up to 4 days, according to Garmin Garmin	—
Water resistance	5 ATM; suitable for swimming Garmin	—
Connectivity and calls	Bluetooth, ANT+, Wi-Fi; speaker / microphone, paired compatible phone required for calls Garmin	—
Health and training	Heart rate, HRV, sleep, skin temperature; training readiness and recovery tracking Garmin	—
Software 18.32	Includes fixes for resets when changing screens during activities and Spotify playback after skipping tracks with Bluetooth headphones Garmin	—
Case	—	49 mm Grade 5 titanium; natural or black finish; flat sapphire front crystal Ultra 3 is sold only as a 49 mm GPS + Cellular watch; bands fit 130–210 mm wrists. Apple
Chip and storage	—	S10 SiP with 64-bit dual-core processor; 4-core Neural Engine; 64 GB storage Apple
Cellular and satellite	—	5G RedCap and LTE (A3281); international roaming; satellite connectivity for Emergency SOS, Messages and Find My RedCap is a reduced form of 5G for low-data devices such as watches. Satellite connectivity lets you call for emergency help and send short messages outside cellular coverage; Apple says Find My shares location via satellite every 15 minutes. Satellite services are free for two years from activation; Find My and Messages need a carrier plan, and availability varies by region. Apple
Wireless and location	—	Wi-Fi 4 (802.11n) 2.4 and 5 GHz; Bluetooth 5.3; second-generation Ultra Wideband; L1 and L5 dual-frequency GPS (GPS, GLONASS, Galileo, QZSS, BeiDou) Using L1 and L5 together helps reduce reflected-signal errors near tall buildings and under tree cover. Ultra Wideband availability varies by region. Apple
Sensors	—	Electrical heart sensor; third-generation optical heart sensor; blood oxygen; temperature; depth gauge and water temperature; compass; always-on altimeter; high-g accelerometer; high dynamic range gyroscope The electrical heart sensor powers the ECG app; the optical sensor drives heart rate and Apple’s hypertension notifications. Hypertension notifications passively analyse 30-day periods and are not intended for people under 22, during pregnancy or for those already diagnosed. The temperature sensor is not for medical use; the Blood Oxygen app is for wellness use. Apple
Durability	—	100 m water resistance under ISO 22810:2010; recreational scuba diving to 40 m under EN13319; IP6X dust; tested to MIL-STD 810H Diving needs a compatible third-party app; the depth gauge is accurate to ±1 m. MIL-STD 810H covers altitude, high/low temperature, temperature shock, immersion, freeze/thaw, ice and freezing rain, shock and vibration. Passing these tests does not mean the watch cannot be damaged. Apple
Battery and charging	—	Built-in rechargeable lithium-ion battery; up to 42 hours normal use, up to 72 hours in Low Power Mode; about 80% in 45 minutes; Magnetic Fast Charger to USB-C cable (1 m) Apple says 15 minutes of charging gives 12 hours of normal use and 5 minutes gives 8 hours of sleep tracking. Apple’s 80% in 45 minutes figure is based on its 20 W USB-C power adapter. Low Power Mode is rated at 20 hours of continuous outdoor workout with full GPS and heart rate. Apple
Audio	—	Three-mic array with beamforming and wind noise mitigation; dual speakers; siren The siren helps people nearby locate a user who is lost or needs help. Apple
Size and weight	—	49 × 44 × 12 mm; 61.6 g (natural), 61.8 g (black) Apple
Software and compatibility	—	watchOS 26; requires iPhone 11 or later (iPhone SE 2nd generation or later) running iOS 26 or later The watch does not pair with Android phones; setup and most features require an iPhone. Apple
Operating conditions	—	On wrist −20 to 55 °C; operating 0–35 °C; diving 0–40 °C; altitude −500 to 9000 m Apple