The Apple Watch, introduced in 2015, is a line of smartwatches by Apple Inc. It comes in various models, materials, and sizes, allowing for customization. Running on WatchOS, it features a Retina display, health and fitness tracking capabilities, and a wide range of apps from the App Store. The watch emphasizes communication, supporting calls, messages, and notifications. Notable features include Apple Pay, customizable watch faces, and water resistance in certain models. Designed to work seamlessly with iPhones, the Apple Watch has seen multiple series and iterations, each bringing new features and improvements. It has become a popular and versatile device, particularly known for its integration with the Apple ecosystem.