iPhone Apps to PDF annotation

PandaDoc is an all-in-one document automation software that simplifies the creation, sending, tracking, and e-signing of sales documents like proposals, quotes, and contracts. It streamlines workflows and enhances collaboration for sales teams and businesses.

Documents by Readdle is a powerful file manager, media player, and document viewer for iPhone and iPad. It allows users to organize files, download content, view various document types, listen to music, watch videos, and annotate PDFs all within a single application.

ezPDF Reader is a highly-rated multimedia PDF viewer and annotator for mobile devices. It supports interactive forms, freehand drawing, text highlighting, and offers features like Text-to-Speech and document synchronization, making it a versatile tool for users who work with PDFs on the go.

colwiz is a comprehensive research management software designed for academics and researchers. It provides tools for organizing research papers, generating bibliographies, collaborating with peers, and managing research projects.

Xodo is a comprehensive, cross-platform PDF solution offering a wide array of tools for viewing, annotating, editing, signing, and creating PDF documents. With robust collaboration features and seamless cloud integration, it caters to both individual and professional use.

ThinkFree Office is a comprehensive office suite written in Java, providing a robust and cross-platform solution for document creation, editing, and collaboration on Windows, Linux, macOS, and Android.

Signority is a secure cloud-based platform for electronic signatures, offering comprehensive tools for managing document workflows, sending documents in bulk, and seamless integrations with popular services.

ReadCube is a powerful desktop and web-based reference management and PDF annotation tool designed for researchers and students.

Diigo is a comprehensive online tool designed for researchers, students, and lifelong learners to collect, organize, annotate, and share information found on the web. It acts as a powerful bookmarking service combined with robust annotation capabilities for web pages, PDFs, and documents.

Mendeley is a freemium reference manager and academic social network designed for researchers. It helps organize, manage, and share research papers, generate citations, and collaborate on projects.

Adobe Acrobat Reader DC is the venerable and widely adopted standard for interacting with PDF documents. It provides robust tools for viewing, printing, signing, and commenting on PDF files across various devices and platforms.

Foxit Reader is a robust and feature-rich PDF reader and editor that provides users with a comprehensive set of tools for viewing, annotating, signing, and creating PDF documents. Known for its blend of performance and functionality, it caters to both casual users and professionals handling complex PDF workflows.

GoodReader is a powerful document reader and file manager for iOS, excelling in handling large PDF files, annotations, and secure cloud integration, ideal for professionals and students needing robust document management on the go.

Papers is a comprehensive document and reference management software designed for researchers, academics, and students. It helps you organize, curate, and cite your research materials efficiently, integrating tools for importing, annotating, and generating bibliographies.

Evernote is a popular cross-platform note-taking application designed to capture, organize, and manage your notes. It offers robust syncing capabilities across devices and includes features like web clipping, OCR for images, and integration with other services to streamline your productivity and information management.