PDF Cabinet for iPhone

App summary

PDF Cabinet is an iPhone app built to make annotating PDFs fast and uncomplicated. It focuses on the core tools people actually use, avoiding cluttered toolbars so users can get work done without a steep learning curve. The design prioritizes speed for reviewing large documents and makes it easy to move between pages using a thumbnail sidebar.

Core capabilities

• Handles a variety of file types and preserves compatibility with common PDF readers.
• Provides simple, dedicated notebooks for jotting down notes alongside documents.
• Lets you attach and send multiple files in a single email message.
• Supports live, simultaneous annotation by multiple participants.
• Allows easy sharing of annotated copies that remain readable across different devices.

Collaboration and distribution

PDF Cabinet enables several people to annotate the same PDF in real time, which helps teams review and mark up documents together. Once edits are finished, annotated versions can be shared broadly and stay accessible in most PDF viewers, so collaborators don’t need the same app to see the changes.

File support and export options

The app accepts multiple document formats and offers straightforward export and sharing choices. You can bundle several files into one outgoing email, and the exported documents maintain layout and annotations for broad compatibility.

Navigation and user experience

The interface is built for quick scanning: a thumbnail strip in the sidebar speeds up navigation through long files and makes spot-checking efficient. By keeping the feature set focused, the app reduces distractions and accelerates common tasks like highlighting, commenting, and page review.

Suggested alternative

Paper (by WeTransfer) — free option: a simple, well-designed alternative for users who prefer a different annotation and note-taking workflow while staying on iPhone.