Best Fill PDF Free Apps

250+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated July 2026

Acrobat Reader is the household name in fill pdf free, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Fill PDF Free Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Acrobat Reader: PDF EditorAcrobat Reader: PDF EditorFree4.7★ (635K)NoYesAug 2026
2pdfFiller: edit PDF documentspdfFiller: edit PDF documentsFree4.4★ (7.6K)NoYesAug 2026
3Form Filler: fill & sign formsForm Filler: fill & sign formsFree4.6★ (32K)NoNoAug 2026
4PDF Expert: Editor & ConverterPDF Expert: Editor & ConverterFree4.7★ (216K)NoYesAug 2026
5PDF Fill & Sign. Editor FillerPDF Fill & Sign. Editor FillerFree4.6★ (6.5K)NoYesAug 2026
6Fill and Sign Documents: eSignFill and Sign Documents: eSignFree4.3★ (4.8K)YesYesAug 2026
7PDF Gear - PDF Editor & ReaderPDF Gear - PDF Editor & ReaderFree4.7★ (8.2K)NoNoAug 2026
8Genius Scan - PDF ScanGenius Scan - PDF ScanFreeYesYesJul 2026

Top Picks for Fill PDF Free

Acrobat Reader: PDF Editor#1

Acrobat Reader: PDF Editor by Adobe Inc.

Documents Editor & Converter
Editor's Choice
💼 Business
4.7😞(637K ratings)
FreeIn-App Purchases
#2in Business
Acrobat Reader: PDF Editor screenshot 1
Acrobat Reader: PDF Editor screenshot 2
Acrobat Reader: PDF Editor screenshot 3
Acrobat Reader: PDF Editor screenshot 4
Acrobat Reader: PDF Editor screenshot 5
Acrobat Reader: PDF Editor screenshot 6

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
pdfFiller: edit PDF documents#2

pdfFiller: edit PDF documents by airSlate, Inc.

Scan, fill, sign,make pdf docs
Strong Contender
💼 Business
4.4😞(8.5K ratings)
FreeIn-App Purchases
#51in Business
pdfFiller: edit PDF documents screenshot 1
pdfFiller: edit PDF documents screenshot 2
pdfFiller: edit PDF documents screenshot 3
pdfFiller: edit PDF documents screenshot 4
pdfFiller: edit PDF documents screenshot 5
pdfFiller: edit PDF documents screenshot 6

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
Form Filler: fill & sign forms#3

Form Filler: fill & sign forms by airSlate, Inc.

Create and Edit pdf documents
Worth Considering
📊 Productivity
4.6😐(32K ratings)
Free
Form Filler: fill & sign forms screenshot 1
Form Filler: fill & sign forms screenshot 2
Form Filler: fill & sign forms screenshot 3
Form Filler: fill & sign forms screenshot 4
Form Filler: fill & sign forms screenshot 5

Easily fill and sign PDF documents using a provided link or QR code. This advanced application streamlines the online form-filling process, saving you time and helping you go paperless.

What We Love

  • 👍 User-friendly and easy to use
  • 🚀 Convenient and time-saving
  • 💡 Helpful for managing documents
  • 🚀 Simplifies form filling process

Room to Improve

  • 🐛 Glitchy and buggy performance
  • 👎 Poor navigation and UI design
  • 🔍 Difficulty entering information accurately

More Fill PDF Free apps to explore

4
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
Edit, Read, Scan・Sign Document
Free

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.

Edit PDF text and imagesAnnotate and highlight PDFsFill out PDF forms
📊 Productivity
(216K)
free with in-app purchases
5
PDF Fill & Sign. Editor Filler
PDF Fill & Sign. Editor Filler
PDF Fill & Sign. Editor Filler
Document Reader and Signer
Free

Streamline document management with this app. Easily sign, fill, edit, and share PDFs on the go. Say goodbye to printers and scanners and embrace digital productivity.

Scan documentsE-sign documentsFill out forms
💼 Business
(6.5K)
subscription
6
Fill and Sign Documents: eSign
Fill and Sign Documents: eSign
Fill and Sign Documents: eSign
PDF Editor & e Signature Maker
Free

This app allows users to fill out, sign, and manage PDF documents digitally. It supports creating electronic signatures, requesting signatures from others, and securely storing signed contracts with audit trails. Users can also scan documents and convert them into editable digital files.

Fill PDF formsCreate digital signaturesRequest e-signatures
📊 Productivity
(4.8K)
free with in-app purchases
7
PDF Gear - PDF Editor & Reader
PDF Gear - PDF Editor & Reader
PDF Gear - PDF Editor & Reader
PDF Converter for acrobat PDF
Free

This app offers a comprehensive suite of tools for managing PDF documents on mobile devices. Users can easily view, annotate, edit pages, fill out forms, and digitally sign documents. It provides a free and unlimited experience for all its powerful PDF manipulation features.

View and print PDFsAnnotate with highlights, text, and drawingsOrganize pages (add, delete, rotate, extract)
💼 Business
(8.2K)
free
8
Genius Scan - PDF Scan
Genius Scan - PDF Scan
Genius Scan - PDF Scan
PDF Scanner & OCR
Free
🔧 Utilities
(0)
9
PDF Maker: Converter & Scanner
PDF Maker: Converter & Scanner
PDF Maker: Converter & Scanner
Convert, Compress & Lock Files
Free

Easily convert various file types to high-quality PDFs, compress large documents, and secure sensitive files with password encryption. This powerful toolkit is designed for work, study, and everyday office tasks, offering fast processing and a user-friendly interface.

Convert documents, photos, and spreadsheets to PDFConvert PDF to Word, images, and textCompress PDF files while maintaining quality
🔧 Utilities
(10)
free with in-app purchases
10
PDF Reader: Edit & Sign
PDF Reader: Edit & Sign
PDF Reader: Edit & Sign
Read, convert, sign PDF files
Free
🔧 Utilities
(1)
11
PurePDF - Merge Master
PurePDF - Merge Master
PurePDF - Merge Master
by 鸿宇 何
Free
🔧 Utilities
(0)
12
PDF Reader: Edit & OCR Scan
PDF Reader: Edit & OCR Scan
PDF Reader: Edit & OCR Scan
Sign, annotate & convert files
Free

Easily scan, read, edit, and manage PDF documents on your iPhone and iPad. Convert images to PDF, extract text with OCR, and sign your documents. Organize files with merging, splitting, and password protection.

Scan documents with cameraConvert photos to PDFExtract text with OCR
📊 Productivity
(1)
free with in-app purchases
13
PDF Reader - View All Files
PDF Reader - View All Files
PDF Reader - View All Files
Read PDF Files Smoothly
Free
📊 Productivity
(0)
14
SparkPDF: Scan, Sign & Fill
SparkPDF: Scan, Sign & Fill
SparkPDF: Scan, Sign & Fill
A smoother PDF experience
Free

Easily scan, sign, and fill PDF documents directly from your phone. This app offers a streamlined way to manage everyday document tasks, including merging files, organizing pages, and converting images to PDF. Enjoy a simple, clean, and fast mobile PDF workflow.

Scan documents to PDFAdd signatures and stampsFill out forms
📊 Productivity
(1)
free with in-app purchases
15
FormFill: PDF Filler & Editor
FormFill: PDF Filler & Editor
FormFill: PDF Filler & Editor
Fill & sign forms. No account
Free
📊 Productivity
(0)
16
PDF Fill&Sign-Adobe PDF editor
PDF Fill&Sign-Adobe PDF editor
PDF Fill&Sign-Adobe PDF editor
Mobile Doc Filling, PDF editor
Free

Easily fill out and sign documents directly on your mobile device without needing a printer or scanner. Add text, handwriting, and your signature to forms quickly and efficiently. Share completed documents via email or instant messaging.

Fill text and handwriting into PDF formsCreate and apply e-signaturesShare documents via email/IM
📊 Productivity
(2)
freemium
17
DocFill – PDF Editor & Merger
DocFill – PDF Editor & Merger
DocFill – PDF Editor & Merger
Fill Forms Sign Merge Compress
Free
📚 Education
(0)
18
PDF Editor: Fill, Sign & Scan
PDF Editor: Fill, Sign & Scan
PDF Editor: Fill, Sign & Scan
Edit, Sign & Fill PDF Forms
Free
📊 Productivity
(0)
19
Signature & Fill: Sign PDF
Signature & Fill: Sign PDF
Signature & Fill: Sign PDF
Private form filler & scanner
Free
💼 Business
(0)
20
Tarbo PDF Creator
Tarbo PDF Creator
Tarbo PDF Creator
Convenient PDF generator
Free

Easily create professional-quality PDFs from text, images, or scans. Organize documents by merging multiple files and track your creation history. Streamline your workflow for personal or academic use.

Scan to PDFText to PDFImage to PDF
🔍 Reference
(33)
free with in-app purchases

FAQ about Fill PDF Free

What are the best fill pdf free apps for iPhone?
Acrobat Reader: PDF Editor tops our fill pdf free apps ranking as of July 2026, with a 4.7-star average from 635K App Store ratings, and it's free to download.
Acrobat Reader: PDF Editor has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 250+ fill pdf free apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
You can view, edit, annotate, and sign PDF documents. The app also allows you to convert files to and from PDF, compress PDFs, and use AI features for summarization and document interaction. You can also collaborate on files and store them online.
Paid features include the Adobe Acrobat AI Assistant for summarizing and querying documents, advanced PDF editing for text and images, merging and organizing PDFs, and higher-quality voice options for reading PDFs aloud. These features are accessible through a subscription.