The Samsung Galaxy Watch 8 Ultra—also known as Galaxy Watch Ultra 2025—is a premium 47 mm smartwatch built from aerospace-grade titanium with Sapphire-glass display and 10 ATM / IP68 and MIL‑STD‑810H water/dust resistance (up to 100 m). Its 1.5″ Super AMOLED display, peaking at 3,000 nits brightness, remains sharply legible indoors and in direct sunlight. Powered by the Exynos W1000 (3 nm) chipset, with 2 GB RAM and 32 GB storage, running Wear OS 5 with One UI Watch 6 and Galaxy AI features like Energy Score and running coach powered by Gemini AI. A 590 mAh battery supports up to 60 hours typical use with Always-on Display, or up to 100 h in power-saving mode. It includes advanced BioActive sensors—ECG, SpO₂, body composition, temperature—alongside dual-frequency GPS and an Intuitive Quick Button for shortcuts.