Best PDF Expert Viewer Apps

218+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated July 2026

Looking for free pdf expert viewer apps? 20 of our 218+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top PDF Expert Viewer Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1PDF Expert: Editor & ConverterPDF Expert: Editor & ConverterFree4.7★ (215K)YesYesJul 2026
2PDF Expert ViewerPDF Expert ViewerFreeYesNoMay 2026
3PDF Viewer by NutrientPDF Viewer by NutrientFree4.6★ (9.1K)NoYesJul 2026
4PDFelement: PDF Editor, ViewerPDFelement: PDF Editor, ViewerFree4.6★ (7.5K)YesYesJul 2026
5PDF Reader – PDFelementPDF Reader – PDFelementFree4.3★ (3.9K)NoNoJul 2026
6PDF Hero - PDF Editor & ReaderPDF Hero - PDF Editor & ReaderFree4.6★ (10K)YesYesJul 2026
7MobiPDF・PDF Text Editor・ReaderMobiPDF・PDF Text Editor・ReaderFree4.8★ (6.9K)YesYesJul 2026
8Acrobat Reader: PDF EditorAcrobat Reader: PDF EditorFree4.7★ (632K)YesYesJul 2026

Top Picks for PDF Expert Viewer

PDF Expert: Editor & Converter#1

PDF Expert: Editor & Converter by Readdle Technologies Limited

Edit, Sign, Convert Documents
Editor's Choice
📊 Productivity
4.7😐(215K ratings)
FreeAdsIn-App Purchases
#64in Productivity
PDF Expert: Editor & Converter screenshot 1
PDF Expert: Editor & Converter screenshot 2
PDF Expert: Editor & Converter screenshot 3
PDF Expert: Editor & Converter screenshot 4
PDF Expert: Editor & Converter screenshot 5
PDF Expert: Editor & Converter screenshot 6

This app allows you to edit, annotate, fill out forms, and convert PDF documents. It offers AI-powered summarization and analysis, along with tools to merge, sign, and protect your files. Work seamlessly across Apple devices with a user-friendly interface.

What We Love

  • 🚀 Fast and responsive
  • 👍 Intuitive and user-friendly interface
  • 💡 Powerful annotation and editing tools
  • 🔒 Seamless cloud integration

Room to Improve

  • 🐛 Frequent crashes and stability issues
  • 🔒 Subscription model for advanced features
  • 🔒 Inconsistent pricing and feature changes
PDF Viewer by Nutrient#3

PDF Viewer by Nutrient by PSPDFKit GmbH

Fill Forms, Sign, Edit, Redact
Worth Considering
📊 Productivity
4.6😊(9.1K ratings)
FreeIn-App Purchases
PDF Viewer by Nutrient screenshot 1
PDF Viewer by Nutrient screenshot 2
PDF Viewer by Nutrient screenshot 3
PDF Viewer by Nutrient screenshot 4
PDF Viewer by Nutrient screenshot 5
PDF Viewer by Nutrient screenshot 6

Easily view, search, and annotate PDF documents on your iPhone and iPad. Import files from cloud services, fill out forms, add signatures, and organize your documents. Advanced features like redaction and combining documents are available with a Pro subscription.

What We Love

  • 🚀 Seamless integration with iCloud and Files app
  • 👍 Intuitive annotation tools with Apple Pencil
  • 🎨 Versatile highlighting and drawing options
  • 💾 Saves annotations to original PDF files

Room to Improve

  • 🐛 Occasional crashes and performance issues
  • 🤔 Confusing UI and steep learning curve
  • 🔀 Difficulty managing and organizing PDF files

More PDF Expert Viewer apps to explore

4
PDFelement: PDF Editor, Viewer
PDFelement: PDF Editor, Viewer
PDFelement: PDF Editor, Viewer
Edit,read,sign,annotate pdf
Free

This application offers comprehensive PDF management, including advanced editing, AI-powered summarization and translation, and efficient scanning with OCR. It helps organize, convert, and secure documents for work, study, and personal use.

AI Chat with PDFScan and OCRPDF to Office Conversion
📊 Productivity
(7.5K)
free with in-app purchases
5
PDF Reader – PDFelement
PDF Reader – PDFelement
PDF Reader – PDFelement
PDF Editor & Viewer, PDF Maker
Free

This app offers a superior PDF reading experience with its innovative Liquid Mode, which optimizes documents for mobile screens. It also provides robust tools for annotating, signing, managing, and sharing your PDF files, catering to both work and study needs.

Liquid Mode for optimized mobile readingAnnotation tools (pencil, text, highlighting)Handwritten signature insertion
📊 Productivity
(3.9K)
free
6
PDF Hero - PDF Editor & Reader
PDF Hero - PDF Editor & Reader
PDF Hero - PDF Editor & Reader
Create & Edit PDF Documents
Free

Edit, create, and manage PDF documents on your mobile device. Annotate, fill forms, sign, and share files with ease. Offers advanced features like OCR and compression for enhanced document control.

Create PDFs from scratchEdit text and annotate documentsFill and sign PDF forms
💼 Business
(10K)
free with in-app purchases
7
MobiPDF・PDF Text Editor・Reader
MobiPDF・PDF Text Editor・Reader
MobiPDF・PDF Text Editor・Reader
Edit, Convert Documents・Expert
Free

Edit, create, and secure PDF documents on your mobile device. Scan paper documents to editable PDFs, recognize text with OCR, and fill or sign forms. Convert between PDF and other formats, and protect sensitive files with passwords.

Scan documents to editable PDFsRecognize text with OCREdit text, images, and signatures
📊 Productivity
(6.9K)
free with in-app purchases
8
Acrobat Reader: PDF Editor
Acrobat Reader: PDF Editor
Acrobat Reader: PDF Editor
Documents Editor & Converter
Free

This app is a powerful PDF tool for viewing, editing, annotating, and signing documents. It offers AI-powered features for summarizing and interacting with PDFs, along with robust conversion and security options. Collaborate on files and access your documents from anywhere.

View, edit, and annotate PDFsSign and fill PDF formsConvert files to and from PDF
💼 Business
(632K)
freemium
9
Converter & Editor: PDF Expert
Converter & Editor: PDF Expert
Converter & Editor: PDF Expert
Сonvert Photos and Documents
Free

Transform PDFs into editable documents like Word and Excel, and create custom stickers for your messages. Effortlessly manage and annotate PDFs while ensuring high-quality conversions and personalized chat experiences.

Smart PDF ConverterEditable format conversionCustom sticker design
💼 Business
(319)
free with in-app purchases
10
PDF Converter - Reader for PDF
PDF Converter - Reader for PDF
PDF Converter - Reader for PDF
PDF Scanner, Editor, Creator
Free

Easily find, create, convert, and edit PDF documents. Search for PDFs online, convert various file types to PDF, and download multiple files simultaneously. Annotate and highlight text within your documents.

Search PDFs onlineCreate PDFs from websitesConvert documents to PDF
🔧 Utilities
(18K)
free with in-app purchases
11
PDF Export: Scan, Merge & Sign
PDF Export: Scan, Merge & Sign
PDF Export: Scan, Merge & Sign
Tools, Merge & Compress PDFs
Free

This app provides comprehensive tools for creating, editing, converting, and organizing PDF files on your mobile device. It offers features like scanning documents, merging files, adding watermarks, and even transcribing audio to text, all without requiring an internet connection.

Convert Word, Excel, JPG to PDFConvert PDF to Word, Excel, PPTEdit PDF text and images
💼 Business
(1.7K)
free with in-app purchases
12
PDF Editor ®
PDF Editor ®
PDF Editor ®
Edit, Reader Converter Maker 7
Free

Edit, sign, and convert PDF documents directly from your mobile device. Scan physical papers into editable PDFs, annotate text, and fill out forms on the go. All your documents are stored locally for privacy and can be easily shared.

Edit PDF filesSign documentsConvert scanned papers to PDF
💼 Business
(28K)
free with in-app purchases
13
Foxit PDF Editor
Foxit PDF Editor
Foxit PDF Editor
View, Edit, Convert, and Sign
Free

This mobile app offers comprehensive PDF management, allowing users to view, edit, annotate, and convert PDF files on the go. It includes AI-powered features for summarization, translation, and text enhancement, alongside robust tools for creating, signing, and protecting documents.

AI-powered PDF summarization and translationEdit text and images within PDFsConvert PDFs to and from various formats
📊 Productivity
(4.8K)
freemium
14
PDF Pro - Reader Editor Forms
PDF Pro - Reader Editor Forms
PDF Pro - Reader Editor Forms
Edit, annotate, view documents
Free

Edit, annotate, and read PDF documents on your iPhone and iPad. Highlight text, add notes, shapes, voice recordings, and photos. Search your entire PDF library, fill out forms, and sign documents.

Edit and annotate PDFsHighlight text and add notesEmbed audio and photo annotations
📊 Productivity
(6.8K)
subscription
15
PDF Reader & PDF Editor
PDF Reader & PDF Editor
PDF Reader & PDF Editor
Read, Edit, Sign PDF Files
Free

This app is a comprehensive tool for managing PDF documents. It allows users to quickly view, annotate, edit, and organize PDFs, as well as convert images to PDF. Advanced features like merging, splitting, and password protection are also available.

Fast PDF viewingPDF annotation and markupAdd e-signatures
💼 Business
(666)
free with in-app purchases
16
PDF it All Document Converter
PDF it All Document Converter
PDF it All Document Converter
Compress PDF Photos,Files,Word
Free

This app offers a comprehensive suite of tools for managing PDF documents. It allows users to compress, convert, edit, merge, split, sign, and protect PDF files. All operations are performed locally on the device for enhanced security.

Compress PDF filesConvert Office, Web, Photos to PDFEdit PDF pages (remove, rotate)
📊 Productivity
(7.9K)
free with in-app purchases
17
Power PDF - PDF Manager
Power PDF - PDF Manager
Power PDF - PDF Manager
Create, Modify, Secure PDF
Free

Create, modify, and secure PDF documents on your mobile device. Convert various file types and photos to PDF, scan documents with your camera, and manage files with a built-in file manager. View, annotate, and search within PDF documents with ease.

Create PDFs from DOC, XLS, PPT, TXT, and photosScan to PDF using cameraCombine, split, delete, and reorder PDF pages
🔧 Utilities
(1K)
free with in-app purchases
18
PDF Reader - Editor & Viewer
PDF Reader - Editor & Viewer
PDF Reader - Editor & Viewer
Editor, Converter, OCR
Free

Edit, convert, and manage PDF documents on your mobile device. This app allows you to directly edit text, scan documents, fill out forms, and secure your files with passwords and watermarks. It also supports OCR to extract text from scans and convert PDFs to various formats.

Edit PDF text directlyConvert PDF to Word, Excel, PPT, imagesOCR for text extraction from scans
🔧 Utilities
(2.9K)
freemium
19
PDF Editor・PDF File Converter
PDF Editor・PDF File Converter
PDF Editor・PDF File Converter
PDF Scanner, Filler and Signer
Free

Easily scan, convert, edit, and manage your PDF documents. This all-in-one tool allows you to transform images to PDF, convert PDFs to Word, fill out forms, and add digital signatures.

Edit text, fonts, and colors in PDFsConvert images and documents to PDFScan paper documents into high-quality PDFs
📊 Productivity
(151)
free with in-app purchases
20
Smart PDF
Smart PDF
Smart PDF
by ORBITAL TECH PTE. LTD.
Free

Easily manage and process PDF files with this powerful tool. Convert PDFs to images, create PDFs from images, and merge multiple documents seamlessly. Streamline your workflow and enhance productivity with its intuitive interface.

Convert PDFs to imagesTransform images into PDFsMerge multiple PDF files
🔧 Utilities
(876)
free

FAQ about PDF Expert Viewer

What are the best pdf expert viewer apps for iPhone?
PDF Expert: Editor & Converter tops our pdf expert viewer apps ranking as of July 2026, with a 4.7-star average from 215K App Store ratings, and it's free to download.
Yes — 20 of the top pdf expert viewer apps we rank are free to download, including PDF Expert: Editor & Converter and PDF Expert Viewer.
PDF Expert: Editor & Converter shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 218+ pdf expert viewer apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
PDF Expert allows you to read, highlight, and annotate PDFs, fill out forms, convert files to and from PDF format, merge multiple documents, add notes, and sign contracts. It also features AI tools for summarizing and analyzing large PDFs, and editing scanned documents.
Premium features include the ability to edit existing text and images directly within a PDF, add links, create outlines, and utilize the AI-powered PDF Copilot for summarization, main point extraction, and contextual explanations. You can also convert PDFs to various formats like Word, Excel, and JPG.