PDF Sign is a free Android application that enhances the way users interact with PDF documents. This tool allows for easy selection and reading of PDF files, featuring a smooth zooming capability that ensures clear visibility of text and images. Users can enrich their PDFs by adding customizable watermarks, choosing from preset options or creating their own with personalized text. Additionally, the app supports the incorporation of images as unique watermarks, catering to diverse user needs.

One of the standout features of PDF Sign is its electronic signature functionality. The built-in doodle board enables users to create signatures quickly and integrate them directly into their documents. After editing, the PDFs can be saved conveniently in designated folders on the device, ensuring organized access to important files. Overall, PDF Sign is a comprehensive tool for anyone looking to manage their PDFs effectively.