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PDF Expert - Edit, annotate and sign PDF documents

By Readdle


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PDF Expert 5 is a must-have app for anyone who reads, annotates or edits PDF documents on iPad or iPhone. It allows you to mark up documents with highlights and handwriting, insert text and stamps, sign and even merge PDFs. Moreover, PDF Expert 5 is the best choice for filling out PDF forms right on your iPad and iPhone.

“PDF Expert 5 is one of my must-have iPad apps and a desktop-class PDF reader” -

“I was blown away at how easy the app is to use” - MakeUseOf.

“The best app for managing, editing, and reading PDFs on your iPad” - The Sweet Setup.

You can open various file formats such as iWork, MS Office, PowerPoint, text files, images, even music and video files, etc. Get these files from desktop computers, email attachments, documents on Dropbox, OneDrive, GoogleDocs and “Open in" from other applications.

PDF Expert 5 provides the best experience for filling out PDF forms. Text fields, checkboxes, radio buttons and other form elements work as you expect and all the information you enter is saved within the form. Even complex interactive forms with Javascript work impressively well.

With PDF Expert 5 you can:

- Highlight Text -
Mark important things in books, journals or documents you want to review.

- Fill Forms -
Work with static PDF forms created in Adobe Acrobat.

- Create Notes -
Add comments to the texts you read.

- Draw with your finger-
Use it to make handwritten notes or highlight text in scanned books.

- Make Bookmarks -
Create table of contents for your document right on iPad and iPhone.

- Review Documents -
Mark up errors and place special emphasis on important sentences.

-Sign Documents
Use digital signatures to sign contracts and agreements on the go.

Other things PDF Expert 5 lets you do:

+ Read PDFs with ease
PDF Expert 5 has one of the best PDF viewers for iPad and iPhone. It opens large files, supports full text search, handles PDF links and outlines, opens password-protected documents and extracts text from PDFs.

+ Copy Files From Mac or PC via Wi-Fi and USB
Use iTunes file sharing to transfer files directly to your iPad or iPhone via USB cable. As an alternative connect your iOS device running PDF Expert 5 via Wi-Fi and operate it like a wireless flash drive. No additional software is required.

+ Save Email Attachments
Open attachments directly from the Mail app. Also, you can open PDF files from any other application on the iPad or iPhone via "Open In..." dialogue.

+ Sync your files with various cloud services
PDF Expert 5 allows you to download and upload files from Dropbox, OneDrive, Google Drive and other services. If you use more than one cloud storage, PDF Expert 5 will handle all of them.

+ Share Files With Your Friends
Email files directly from PDF Expert 5 with all annotations you made.

+ Protect Documents with Password and Encryption
Restrict access to PDF Expert 5 with a password to protect your files from unauthorized reading. Enable iOS Data Protection to encrypt everything while your iPad or iPhone is not in use.

+ Text To Speech (only on iPad)
You can listen to e-books or audio files on the road or when you don’t feel like reading. PDF Expert 5 intelligently processes PDF books and uses iOS text- to-speech API to read them aloud.

And one more thing:

• Review Mode •
The Review Mode allows you to mark up PDF documents in a very special way. Just tap anywhere on the text where you need changes and correct it in the text editor. The text that you delete is marked as removed while everything you add is shown as new text in different colors. Currently available only on iPad.

NOTE: We cannot reply you in comments. If you have any comments or issues, please contact us directly at

What's New in Version 5.7.7

+ General performance and stability improvements.

Please, spend a minute and leave a quick review in the App Store. It really helps others make a better decision before downloading PDF Expert 5.


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Customer Reviews

Would be excellent if it didn't crash so often.

This is definitely one of the best pdf readers/annotators in the AppStore because of its many annotating features and tabs allowing you to work with multiple pdfs simultaneously. I use it to store dozens of my textbooks. However, the app repeatedly crashes unexpectedly when you are doing nothing other than viewing a page. It doesn't just happen at the moment you attempt to open a PDF or change the page, but it can happen afterward like a minute after you have finally navigated to the page you want and are busy reading. Perhaps it has problems handling pdfs with large file sizes as the majority of mine are textbooks with hundreds of pages rather than 2-3 page forms business professionals might work with on a daily basis. I suppose this app would be excellent if those kinds of pdfs are what you primarily work with. I had thought that the latest update would have mitigated the frequent crashes, but it doesn't. Worse is that after a crash it opens your PDF to a random page rather than the page you were on and you waste time trying to navigate to it again. I really want this app to work! It does everything I want a PDF app to do! Please fix it soon!

Good PDF Editor

I haven't tried it for PDF forms, just static PDF documents, but it seemed nearly perfect.
The viewer was quick and didn't lag (even with large textbook PDF files on my old iPad mini 2), the annotation features were good, though there was unfortunately no stylus support, and the palm recognition was simply *amazing*. I only got it to mess up once, and I put my hand everywhere on the screen.
I liked the ability to move pages around, though I wish it was possible to flip the order. Also, merging PDFs was a little unintuitive, though possible. You have to copy the pages you want from one document and paste them in another, and the pasting can be a little tricky. It's very easy to mess up and paste the pages before the end of the document, and then there's no undo button. I would have liked an undo button, an easier pasting interface, and a way of merging documents by touch.
That being said, this app really helped me start going paperless.


Have used for years and don't even feel the need to reach out to other apps when this app does all I need it to do, and more. For people that would like to be able to store a substantial amount of files in iCloud, saving space and having access to everything no matter where you are, is great. Also, as a student it has become an indispensable tool I can open up my research literature in and basically mark up points of interest, capture quotes and leave impromptu notes, that in all probability will become key points in my finished piece.
So easy to use even without instruction as is the same company"s scanner, calendar and printer pro.
I cannot speak for the Dropbox sync as I really don't like dealing with Dropbox but when I am forced to by other apps, it rarely goes smoothly. Everything I send or take from the cloud on this app is almost instantaneous.

PDF Expert - Edit, annotate and sign PDF documents
View in iTunes
This app is designed for both iPhone and iPad
  • $9.99
  • Category: Productivity
  • Updated:
  • Version: 5.7.7
  • Size: 136 MB
  • Languages: English, French, German, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish
  • Seller:

Compatibility: Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

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