Yes, Stellarium Mobile - Star Map offers a free version with limited features, allowing users to experience the app before deciding to purchase the full version.

No, Stellarium Mobile - Star Map does not require an internet connection to function, allowing users to explore the night sky offline after the app is downloaded.

You can contact support or send feedback through the app's help menu or by visiting the official Stellarium website, where you can find additional resources and contact information.

If you have subscribed through an app store, you can manage or cancel your subscription through your account settings in that store. For other inquiries, consulting the app's help section may provide specific instructions.