WhatsApp’s smartwatch support for Android Wear belongs to the platform now known as Wear OS. Google introduced Android Wear as its smartwatch operating system in 2014, then changed the branding to Wear OS by Google in 2018.
Android Wear was intended to extend smartphone notifications and selected app functions to a user’s wrist. Early compatible watches included the LG G Watch and Samsung Gear Live, while later models such as the Moto 360 helped popularize the platform’s round-watch design.
The name change did not mean Android Wear suddenly became an unrelated operating system. Wear OS remained Google’s wearable platform, with the new name emphasizing that it was not limited to phones running Android. It also reflected Google’s effort to make the platform more broadly recognizable.
The main quiz trap is the timing: WhatsApp support dates to the Android Wear era, but the current name is Wear OS. HarmonyOS, Tizen, and watchOS are separate wearable platforms associated with Huawei, Samsung, and Apple respectively.