PDF markup tool

This tool provides on-device PDF markup capabilities on iPad, allowing users to import PDFs, apply annotations, stamps, and signatures, and export the result as a new PDF. Conceptually, the tool keeps the original document intact while layering user annotations in a non-destructive manner, enabling easy re-opening and editing. It is designed for professionals who perform field reviews, classroom handouts, or client meetings where desktop tools are unavailable. The core value lies in privacy, offline capability, and immediate output without uploading sensitive documents to external servers. Use cases include contract redlines in the field, lecture material annotations, and fast approvals during client discussions. Unique differentiators include robust on-device processing, a focused set of annotation primitives, reliable export fidelity, and optional metadata export for audit trails. Core features cover PDF import, a multi-tool annotation suite (highlighter, underline, strike-through, notes, shapes), signatures and stamps, freehand drawing, page navigation, and secure export. The tool emphasizes smooth performance on typical iPad configurations and maintains compatibility with standard PDF viewers. Relevant workflows include annotating a contract, stamping approvals, signing, and distributing the finished document to stakeholders.