Wear OS (also known simply as Wear and formerly Android Wear) is a version of Google's Android operating system designed for smartwatches and other wearables. By pairing with mobile phones running Android version 6.0 "Marshmallow" or newer, or iOS version 10.0 or newer with limited support from Google's pairing application, Wear OS integrates Google Assistant technology and mobile notifications into a smartwatch form factor. Wear OS supports Bluetooth, NFC, Wi-Fi, 3G, and LTE connectivity, as well as a range of features and applications. Watch face styles include round, square and rectangular. Hardware manufacturing partners include Asus, Broadcom, Fossil, HTC, Intel, LG, MediaTek, Imagination Technologies, Motorola, New Balance, Qualcomm, Samsung, Huawei, Skagen, Polar, TAG Heuer, Suunto, and Mobvoi. In the first six months of availability, Canalys estimates that over 720,000 Android Wear smartwatches were shipped. , Wear OS had between 10 and 50 million application installations. Wear OS was estimated to account for 10% of the smartwatch market in 2015. History and compatibility The platform was announced on March 18, 2014, along with the release of a developer preview. At the same time, companies such as Motorola, Samsung, LG, HTC and Asus were announced as partners. 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. The LG G Watch is the first Android Wear smartwatch to be released and shipped. Motorola's Moto 360 was released on September 5, 2014. 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". The LG G Watch and Samsung Gear Live started shipping in July 2014, while the Motorola Moto 360, began shipping in September 2014. The next batch of Android Wear devices, which arrived at the end of 2014, included the Asus ZenWatch, the Sony SmartWatch 3, and the LG G Watch R. , the latest Wear OS devices are the LG Watch Urbane, and the Huawei Watch. On August 31, 2015, Google launched a Wear OS app for IOS version 8.2 or newer, allowing limited support for receiving iOS notifications on smartwatches running Wear OS. , only the LG Watch Urbane and Huawei Watch are supported, but Google announced support for more smartwatch models. In March 2018, Android Wear was rebranded as Wear OS. It was stated that the