The Samsung Galaxy Gear is a smartwatch produced by Samsung Electronics in the Samsung Gear family of devices. Unveiled during a Samsung Unpacked event in Berlin, Germany on September 4, 2013, the device serves as a companion for all Samsung Galaxy smartphones and tablets which runs on Android 4.3 "Jelly Bean" or newer. It was released on September 25, 2013. Originally released as an Android-based device, Samsung replaced the operating system with Tizen through the May 2014 software update.

A smartwatch is a portable and wearable computer device in a form of a watch; modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides management and telemetry, such as long-term biomonitoring. While early models could perform basic tasks such as calculations, digital time telling, translations, and game-playing, smartwatches released since 2015 have more general functionality closer to smartphones, including mobile apps, a mobile operating system, and WiFi/Bluetooth connectivity. Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset. Some models, called watch phones, have mobile cellular functionality such as making telephone calls.