Yes, PDF Reader - PDF Viewer offers a free version with basic features, and users can try a free trial of premium features before committing to a subscription.

No, PDF Reader - PDF Viewer does not require an internet connection to view or annotate PDF files, allowing offline access to your documents.

For support or feedback, you can reach out through the app's help section or visit the official website for customer service options.

You can manage or cancel your subscription through the app's settings or your device's app store subscription management settings.