COS Watch Face

COS is a minimalist Wear OS watch face that turns real-world conditions into a changing planetary scene.

Weather, time of day and celestial conditions are represented directly on the watch face. Clear skies, clouds, rain, storms, snow and fog change the environment around the curved Earth horizon, while the Sun and Moon move through the scene according to real conditions.

Time, date, temperature and current weather remain visible within a monochrome interface inspired by scientific instruments and space exploration.

Interactive areas provide quick access to alarms and calendar, weather information.

COS is designed to work alongside the free COS companion app, which expands the experience with weather graphs, sensors, astronomy, Solar System exploration and spaceflight information.

COS is completely free. No ads, subscriptions or paid features.