Wear OS[a] is a closed-source Android distribution designed for smartwatches and other wearable computers,[9][10][11] developed by Google.

[13] Wear OS supports Bluetooth, NFC, Wi-Fi,[14] 3G, and LTE connectivity, as well as a range of features and applications provided through Google Play.

Hardware manufacturing partners include Asus, Broadcom, Fossil, HTC, Intel, LG, MediaTek, Imagination Technologies, Motorola, New Balance, Xiaomi, Qualcomm, Samsung, Huawei, Skagen, Polar, TAG Heuer, Suunto, and Mobvoi.

[21] On June 25, 2014, at Google I/O, the Samsung Gear Live and LG G Watch were launched, along with further details about Android Wear.

On December 10, 2014, an update started to roll out, adding new features including a watch face API and changed the software to be based on Android 5.0 "Lollipop".

[41] Wear OS can synchronize notifications from a paired device, and supports voice control with the "OK Google" hotword along with gesture-based input.

[42] Via Google Fit and similar applications, Wear OS supports ride and run tracking, and devices containing heart rate sensors can perform a reading on-demand, or at intervals throughout the day.