Stellarium Plus is not entirely free; it offers a subscription model with a trial period, after which users need to subscribe to access all features.

The app includes features such as a realistic starry sky simulation, detailed information about stars and planets, customizable viewing options, and the ability to track celestial events.

Stellarium Plus is an astronomy app designed to provide users with a detailed star map and interactive sky observations, allowing them to explore celestial bodies and constellations.

Stellarium Plus is available on multiple platforms, including iOS and Android devices, as well as desktop versions for Windows, macOS, and Linux.