Right PDF Reader vs PDF Cabinet
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Right PDF Reader
This application provides robust PDF viewing, annotation, and management tools. It allows users to organize, share, and sign documents with a user-friendly interface and advanced features.
- Fast PDF viewing
- Annotation tools (highlight, draw, text)
- Document organization with folders
- Cloud storage integration (Dropbox, WebDAV)
- Handwritten signature creation
- Form filling
- Password protection
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Right PDF Reader goes beyond a free PDF reader app. Created by a team of professionals in the PDF software business since 1993, Right PDF Reader has a simple UI that is easy to navigate and more features than average free readers. PDF Viewing - Fast document open speed - Browse lets you view PDFs in the device or iCloud - Supported thumbnail view - View PDF portfolio, comment, attachment and protected document - Single page view or continuous view available - Fit page width or whole page are also available under single page view - Use Day/Night mode to adjust brightness - After tapping page number, you can enter a number and jump to that page directly. - Quickly add and edit Bookmarks and Marks - Search document Note and Comments - Use highlight, cross-out and underline to annotate PDF with customizable color and opacity - Note lets you to add text comment anywhere in PDF - Use Draw Tools to mark up PDF with color, thickness and opacity of your choice. Move and undo are also supported - Batch remove comments Document Management - Create folder to organize PDFs better - Move or copy multiple documents to a folder - Compress multiple documents or folders, or extract any package quickly - Rename document - Attach one or multiple PDFs to an e-mail - Select and delete multiple documents Online Sharing - Get documents in and out of Dropbox - Add WebDAV servers to upload/download documents easily - Access documents in Gaaiho PDF online or upload documents directly to the app (permissions required), breaking the barrier between computer and your iPhone/iPad Handwritten signature - You can create a handwritten signature by drawing, using an image, or taking a photo - Sign anywhere in document Other Features - Fill a form - Use “open in” to share PDF files with other applications - Auto-memorize the point you quitted reading last time - Protect PDF with an open password - Print document
PDF Cabinet
This application offers a streamlined PDF experience for reading and annotating documents. It focuses on essential features with an intuitive interface, making it easy to mark up PDFs, share annotations, and collaborate in real-time with others. Optimized for performance, it handles large documents efficiently.
- Effortless PDF annotation
- Intuitive user interface
- Fast document review with thumbnails
- Annotations sharing
- Real-time collaboration
- Quick note taking
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THINGS WE ARE PROUD OF - Really effortless PDF annotation - Only the most essential functionality - don't lose yourself in hundreds of buttons - Intuitive user interface that allows you to do exactly what you want - Fast and easy document skimming and review with thumbnails sidebar - Ultimate performance – optimized for really large documents (within reason, of course) - Annotations sharing - send annotated documents to anyone, and mark up will show up in any other reader - Interaction with other Cabinet users - send annotations only to your friends or colleagues using Cabinet – much faster, less traffic - Real-time collaboration with your friends or colleagues – annotate the same document together from several iPads EVEN MORE GREAT THINGS IN CABINET - Amazing and intuitive dynamic annotation menu - Empty notebooks for quick note taking or doodling - Pen and Paper Games for relaxing during non-working hours - Sending multiple documents attached in a single e-mail - Easy work with various document formats - such as .doc, .xls, .ppt and others Did we tell you already that Cabinet is really easy to use? Try it out yourself!
Screenshots
Verdict
The clearest difference is rating: Right PDF Reader at 4.6 against PDF Cabinet's 3.8. Right PDF Reader also leads on review sentiment (92% vs 66%). PDF Cabinet's advantage is update cadence (every 5 weeks vs every 11 months) and ratings volume (56 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Right PDF Reader holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: PDF Cabinet has 56 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 92% of Right PDF Reader's written reviews are positive against 66% of PDF Cabinet's.
Right PDF Reader ships an update every 11 months, PDF Cabinet every 5 weeks. The most recent releases landed on September 27, 2026 and September 28, 2026 respectively.
| Parameter | Right PDF Reader | PDF Cabinet |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5 ratings) — better | 3.8 (56 ratings) |
| Positive reviews | 92.3% of reviews — better | 66.1% of reviews |
| Number of ratings | 5 | 56 — better |
| Update frequency | Every 11 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 79 MB | 75 MB |
| Age rating | 4+ | 4+ |
| Developer | ZEON Corp | Bright Nine SIA |
Customer experience
Right PDF Reader
PDF Cabinet
Bugs and requests
Right PDF Reader
Not enough reviews yet to summarise bugs or requests.
PDF Cabinet
Reported bugs
5 issues- Randomly deleting files
- Sync issues causing loss of annotations
- Crashing when opening large documents
- Navigation problems when zoomed in
- Annotations not exporting properly
Requested features
7 requests- Add more highlighter and pen color options
- Implement palm rejection for Apple Pencil
- Add ability to resize and move annotation tools
- Improve cloud/sync functionality (iCloud, Dropbox, etc.)
- Implement vertical scrolling for continuous reading
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- Add text box annotation feature
- Improve export/sharing options for annotated documents
In-app purchases
Right PDF Reader
No in-app purchases
PDF Cabinet
No in-app purchases









