COS

COS is a Wear OS companion app built around weather, device instrumentation, astronomy and spaceflight.

Explore current weather and forecast data through detailed graphs, track steps, and view live information from your watch sensors including the accelerometer, barometer and magnetometer.

COS calculates the position of the Sun in real time, along with sunrise, sunset, moonrise and moonset information. Explore the Solar System through an interactive orbital view, learn about planets, and discover human space missions including probes, rovers, landers and observatories.

COS also includes a mini chess game and a collection of smaller utilities designed specifically for the watch.

The companion app is designed to work alongside the COS watch face, bringing its weather, astronomy and instrumentation features together in one place.

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