Devices

Device specifications

Each entry is sourced and dated, with no estimated or invented figures. This is a small, growing catalogue, not a full database yet. Compare any two devices.

13 devices

Apple Watch SE 3 shown with app icons floating around it, displaying fitness and messaging screens.

Apple Watch SE 3AppleReleased

Case size40mm case: 40 x 34 x 10.7mm; 44mm case: 44 x 38 x 10.7mm
Water resistance50m (swimproof)
OSwatchOS

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Two Apple Watch Series 12 devices shown side by side, with the sensors visible on the back of one and the Heart Rate app shown on the face of the other.

Apple Watch Series 12AppleReleased · 2026-09-18

Case size42mm case (aluminum/titanium): 42 x 37 x 9.7mm; 46mm case (aluminum/titanium): 46 x 40 x 9.7mm; ceramic case: 47 x 41 x 9.85mm
Water resistance50m (ISO 22810:2010), IP6X dust resistance
OSwatchOS

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Apple Watch Ultra 3 in titanium with a green band, displaying a workout navigation watch face.

Apple Watch Ultra 3AppleReleased · 2025-09-19

Case size49mm: Height 49mm, Width 44mm, Depth 12mm
Water resistance100m water resistance (ISO 22810:2010); recreational scuba diving to 40m; IP6X dust resistance; MIL-STD-810H tested
OSwatchOS

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Apple Watch Ultra 4 titanium case with Digital Crown

Apple Watch Ultra 4AppleReleased · 2026-09-19

Case size49mm height x 44mm width x 12mm depth; fits 130-210mm wrists
Water resistance100m water resistance (ISO standard 22810:2010), IP6X dust resistance (IEC 60529), EN13319 recreational scuba diving to 40m, tested to MIL-STD-810H
OSwatchOS 27

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Amazfit Balance 2 smartwatch with a black leather band, showing its training-load and readiness watch face

Balance 2AmazfitReleased · 2025-06-01

Case size47.4 x 47.4 x 12.3 mm
Battery658 mAh
Water resistance10 ATM

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Garmin fēnix 9 smartwatch in titanium with a gray silicone band, showing its AMOLED watch face

Fenix 9GarminReleased · 2026-08-28

Case sizeAvailable in 43mm, 47mm, and 51mm case sizes
Water resistanceDive-rated to 40 meters
OSGarmin OS

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Samsung Galaxy Watch Ultra emerging from a ocean wave, showing its rugged titanium case

Galaxy Watch UltraSamsungReleased · 2025-07-25

Case size47mm case
Battery590 mAh
Water resistance10 ATM + IP68, MIL-STD-810H tested

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Samsung Galaxy Watch8 in silver with a white band, worn in bed, displaying a sleep score of 92.

Galaxy Watch8SamsungReleased · 2025-07-25

Case size44mm: 46.0 × 43.7 × 8.6 mm
Battery435 mAh
Water resistance5 ATM

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Samsung Galaxy Watch9 44mm in Graphite

Galaxy Watch9 (44mm)SamsungReleased · 2026-07-25

Battery445 mAh
Water resistance5 ATM + IP68, MIL-STD-810H tested
OSWear OS (by Google)

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OnePlus Watch 3 with a green silicone band and steel bezel, displaying a chronograph-style watch face.

OnePlus Watch 3OnePlusReleased

Case size46.6mm (excluding lugs) × 47.6mm × 11.75mm (excluding sensor area)
Water resistanceIP68, 5ATM; MIL-STD-810H tested
OSWear OS by Google + RTOS (dual-system architecture)

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Google Pixel Watch 4 in Champagne Gold with a sage green band, showing the accessibility menu.

Pixel Watch 4GoogleReleased · 2025-10-09

Case size45mm: 45 × 45 × 12.3 mm
Battery41mm: 325 mAh (typical), 45mm: 455 mAh (typical) mAh
Water resistance5 ATM, IP68

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Two Google Pixel Watch 5 units showing the round Actua 360 display and knurled crown, in coral and light blue bands

Pixel Watch 5GoogleReleased · 2026-08-01

Case size41mm or 45mm case; 12.3mm height (45mm model)
Battery332 (41mm), 465 (45mm) mAh
Water resistance5 ATM plus IP68 dust and water resistance

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Xiaomi Watch S4 with black silicone strap, showing a chronograph-style watch face

Xiaomi Watch S4XiaomiReleased · 2025-02-01

Case size47.3mm x 47.3mm x 12.0mm
Battery486 mAh
Water resistance5ATM

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