Comparison

PDF Cabinet vs iDoc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Effortless PDF annotation
  • Intuitive user interface
  • Fast document review with thumbnails
  • Annotations sharing
  • Real-time collaboration
  • Quick note taking
Features
Read full description

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!

About

iDoc

Features
Read full description

iDoc - PDF Reader and Viewer - An INTELLIGENT and OPTIMIZED application for office productivity No need to open your computer or use a web browser to read documents, as all file formats can be opened, read and viewed anytime, anywhere on your phone even offline, without the need for an internet connection. iDoc - PDF Reader and Viewer helps manage and read documents in all file formats: PDF, PPT, XLS, TXT and WORD, quickly and easily. iDoc is an excellent platform where everyone can improve work productivity and learning by uploading, downloading, and sharing documents with the community. Versatile and free document reader - Open and view documents from file manager in any format - Easily read multiple file types with simple gestures - Easily search for files with intelligent search system - Read documents, read file offline - Enjoy smooth file reading with smooth scrolling capabilities Efficient document management - Simple document management and organization - View Category list with various publicly uploaded documents - Move favorite documents to ""Add to Favorites"" for later reading Other features - Zoom in, zoom out PDF files - Easily select to access the popup list of document pages - Rename, delete, sort, and view file details with simple gestures - Easily share document files, PDF files, docx files, xlsx files, ppt files, txt files - Preview documents before deciding to download - Print documents through a connected printer - Easily bookmark and pin documents. Support for multiple formats, open all types of files - PDF file reader - Word file reader: DOC, DOCX, DOCS - Excel file reader: XLS, XLSX - Slide documents: PPT, PPTX, PPS, PPSX - Other Office 365 Word file reader: TXT, ODT, ZIP iDoc will provide you with the best experience with a document reader that can be used anytime, anywhere, simple and FREE! - Compatible with all types of devices, all types of documents - Saves battery and storage space - Fast loading speed - Documents are updated weekly - There is a user community sharing files that makes your life more productive - User-friendly interface, easy to use - Can be used without the Internet - Free to search, read, and download unlimited types of documents iDoc - PDF Reader and Viewer will make your life more productive. Join the document sharing community and DOWNLOAD the smart and convenient PDF Reader and Viewer for FREE!!!

Screenshots

iDoc4 screens

Verdict

The call

The clearest difference is update cadence: iDoc at every 8 days against PDF Cabinet's every 5 weeks. iDoc also leads on iOS requirement (11.0 vs 13.0). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Cabinet ships an update every 5 weeks, iDoc every 8 days. The most recent releases landed on October 23, 2026 and October 4, 2026 respectively.

Scorecard2 real differences · 8 level
PDF Cabinet versus iDoc: the parameters behind the verdict, then further details
ParameterPDF CabinetiDoc
PriceFreeFree
Rating3.8 (57 ratings) — better—
Positive reviews66.1% of reviews—
Number of ratings57 — better—
Update frequencyEvery 5 weeksEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.011.0 — better
Further details — not scored
Size75 MB41 MB
Age rating4+4+
DeveloperBright Nine SIATP Technology Service Company Limited

Bugs and 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
Show 2 more
  • Add text box annotation feature
  • Improve export/sharing options for annotated documents

iDoc

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

PDF Cabinet

No in-app purchases

None

iDoc

No in-app purchases

Questions

Is PDF Cabinet free?
PDF Cabinet is free to download, with no in-app purchases.
Is iDoc free?
iDoc is free to download, with no in-app purchases.
Do PDF Cabinet or iDoc have ads?
Neither PDF Cabinet nor iDoc shows ads.
Which is updated more often, PDF Cabinet or iDoc?
PDF Cabinet ships an update every 5 weeks, and iDoc every 8 days. Most recently, PDF Cabinet was updated on October 23, 2026 and iDoc on October 4, 2026.

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