Best Modify PDF Apps

249+ iOS apps curated and reviewed

4.8 avg rating

20 free apps

Updated August 2026

The best modify pdf apps on iPhone average 4.8★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.

Compare top Modify PDF Apps (August 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	PDF Expert: Editor & Converter	Free	4.7★ (216K)	No	Yes	Aug 2026
2	Acrobat Reader: PDF Editor	Free	4.7★ (644K)	No	Yes	Aug 2026
3	pdfFiller: edit PDF documents	Free	4.4★ (8.5K)	No	Yes	Aug 2026
4	PDF Editor ®	Free	4.5★ (28K)	No	Yes	Aug 2026
5	PDF Reader: Edit & Sign	Free	5.0★ (1)	Yes	No	Aug 2026
6	PDFixy: PDF Editor	Free	—	No	Yes	May 2026
7	NestDocs: PDF Editor&Converter	Free	—	Yes	No	Aug 2026
8	PDF Editor - PDF Reader	Free	—	No	Yes	May 2026

Top Picks for Modify PDF

#1

PDF Expert: Editor & Converter by Readdle Technologies Limited

Edit, Read, Scan・Sign Document

Editor's Choice

📊 Productivity

4.7😐(216K ratings)

FreeIn-App Purchases

#60in Productivity

PDF Expert: Editor & Converter screenshot 1

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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

#2

Acrobat Reader: PDF Editor by Adobe Inc.

Documents Editor & Converter

Strong Contender

💼 Business

4.7😞(644K ratings)

FreeIn-App Purchases

#2in Business

Acrobat Reader: PDF Editor screenshot 1

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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.

What We Love

🚀 Fast and efficient
🔒 Secure document storage
👍 Convenient for reading and annotating PDFs
👍 Useful for students and professionals

Room to Improve

🐛 Buggy and unreliable
🔒 Overly intrusive login requirements
💰 Expensive subscription model

#3

pdfFiller: edit PDF documents by airSlate, Inc.

Scan, fill, sign,make pdf docs

Worth Considering

💼 Business

4.4😞(8.5K ratings)

FreeIn-App Purchases

#50in Business

pdfFiller: edit PDF documents screenshot 1

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This app transforms your device into a mobile office for managing PDF documents. Edit, eSign, and fill out forms, then share or export them. It offers secure storage and access to millions of templates, with offline capabilities.

What We Love

👍 Easy to use
🚀 Makes virtual work easy
💡 Great customer service/support
👍 Simple and organized

Room to Improve

🐛 Buggy and glitchy
💰 Expensive subscription
🔒 Concerns about privacy and security

More Modify PDF apps to explore

Edit, Reader Converter Maker 7

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

free with in-app purchases

PDF Reader: Edit & Sign

PDF Reader: Edit & Sign

Read, convert, sign PDF files

Easily manage your PDF files on your phone with tools for reading, editing, signing, and converting documents. Import files, use the camera, and access recent documents quickly. Convert various file types to PDF and perform essential PDF management tasks like merging and splitting.

Sign documentsAdd text to PDFsHighlight and underline content

PDFixy: PDF Editor

PDFixy: PDF Editor

Pdf Scan, Edit, Sign, Share

NestDocs: PDF Editor&Converter

NestDocs: PDF Editor&Converter

OCR, Scanner & Tools

PDF Editor - PDF Reader

PDF Editor - PDF Reader

Edit, Sign, Scan & Convert PDF

PDF Genie - Unlock & Edit PDF

PDF Genie - Unlock & Edit PDF

PDF Tools | Unlock | Offline

📊 Productivity

PdfPropertiesEditor

PdfPropertiesEditor

Easily edit PDF metadata.

Smart PDF: Edit, Scan, Convert

Smart PDF: Edit, Scan, Convert

Edit, Scan, convert, Sign, OCR

📊 Productivity

Simple PDF Assistant

Simple PDF Assistant

PDF Editor & Converter

PDF Converter – Scan & Edit

PDF Converter – Scan & Edit

All-in-One PDF Tools Made Easy

This app provides a comprehensive suite of tools for creating, editing, and managing PDF files on your mobile device. Easily scan documents, convert various file formats to PDF, and extract text with OCR technology. Organize your documents efficiently for work or study.

Create PDFs from text, images, and documentsScan documents with device cameraOCR text recognition

PDF Converter: Sign & Edit

PDF Converter: Sign & Edit

Photos & Docs to All Formats

📊 Productivity

PDF Editor Scanner: PDFStation

PDF Editor Scanner: PDFStation

Scan, Edit, Convert PDF OCR AI

This mobile app transforms your device into a powerful PDF scanner and editor. It uses AI to scan, convert, edit, sign, and organize PDF documents, offering features like OCR, text summarization, and secure password protection.

AI-powered document scanningEdit, annotate, and sign PDFsConvert between PDF and other formats

📊 Productivity

PDF Text Editor ‑ Edit PDF

PDF Text Editor ‑ Edit PDF

Change & rewrite existing text

Edit, annotate, and organize PDF documents directly on your device. Modify existing text, add new content, and manage pages with a comprehensive suite of offline tools. Prioritizes user privacy with on-device processing and no account required.

Edit existing PDF textAdd new text and imagesAnnotate with drawing tools

📊 Productivity

free with in-app purchases

PDF Reader - PDF PRO Editor

PDF Reader - PDF PRO Editor

Read & Edit PDF Files

📊 Productivity

Pdf Studio : Edit & Convert

Pdf Studio : Edit & Convert

Pdf to Word , Pdf to Excel

📊 Productivity

PDF Tools & Editor

📊 Productivity

Atom PDF - OCR & Edit Document

Atom PDF - OCR & Edit Document

File Reader Scanner Converter

This app streamlines document workflows with features like PDF creation from images, versatile editing tools, and AI-powered chat support. It offers curated templates for business and personal use, along with local PDF reading and document history management.

Convert images to PDFMerge, split, crop PDFsBusiness and personal templates

FAQ about Modify PDF

What are the best modify pdf apps for iPhone?

PDF Expert: Editor & Converter tops our modify pdf apps ranking as of August 2026, with a 4.7-star average from 216K App Store ratings, and it's free to download.

Are there free modify pdf apps for iPhone?

Yes — 20 of the top modify pdf apps we rank are free to download, including PDF Expert: Editor & Converter and Acrobat Reader: PDF Editor.

Does PDF Expert: Editor & Converter have ads or in-app purchases?

PDF Expert: Editor & Converter has no ads and offers in-app purchases, according to its App Store listing as of August 2026.

How many modify pdf apps are on the App Store?

We track 249+ modify pdf apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.

What can I do with PDF Expert?

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.

What are the premium features?

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.