Wear OS watches have a wide range of apps available for fitness tracking, managing notifications, and customizing watch faces. Some of the top apps for Wear OS include Facer for customizing watch faces, Spotify for music streaming, WhatsApp Messenger for messaging, Shazam for music identification, Todoist for task management, Wear Casts for podcasts, Our Groceries Shopping List for shopping, and Strava for fitness tracking and social networking.