Your Question

What's a good iOS app for reading and annotating large PDF documents?

Adobe Acrobat Reader is well-suited for reading and annotating large PDFs on iOS, offering smooth performance and a wide range of annotation tools.

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For handling large PDF documents on iOS, Adobe Acrobat Reader provides a reliable and feature-rich experience. The app is optimized for efficient rendering, allowing you to navigate even complex PDFs without significant lag. It offers a comprehensive set of annotation tools, including highlighting, sticky notes, text boxes, and drawing capabilities. This makes it easy to mark up documents, add comments, and collaborate with others. Furthermore, Adobe Acrobat Reader supports continuous scrolling and various viewing modes, enhancing the reading experience. The ability to sync your annotations across devices via Adobe Cloud Storage ensures you can pick up where you left off, regardless of whether you're using your iPhone or iPad. Users often praise its stability and robust feature set for academic and professional use.

Key Features

Efficient PDF Rendering: Optimized for smooth performance with large files.
Annotation Tools: Highlight, underline, add sticky notes, and draw directly on PDFs.
Cross-Device Sync: Sync annotations and documents across devices via Adobe Cloud Storage.
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I use this app for reading textbooks and research papers, and it handles large PDFs like a champ. The annotation tools are fantastic, and the sync feature is a lifesaver. It's a must-have for any student or researcher.

★★★★★Verified User Review
iOSUpdated Jul 8, 2025
Adobe Acrobat Reader: Edit PDF icon

Adobe Acrobat Reader: Edit PDF

by Adobe Inc.

4.7/ 5.0
Get on App Store

Screenshots

Adobe Acrobat Reader: Edit PDF screenshot 1
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Platform

iOS