Best Fill PDF Free Apps

236+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Acrobat Reader is the household name in fill pdf free, but it's far from the only option. We track 236+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

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😞(628K ratings)
FreeAdsIn-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😞(7.6K ratings)
FreeIn-App Purchases
#52in 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 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
(7.6K)
free
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
(5.5K)
subscription
6
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
Edit, Sign, Convert Documents
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
(215K)
free with in-app purchases
7
SCAN ACE · PDF Scanner App
SCAN ACE · PDF Scanner App
SCAN ACE · PDF Scanner App
Scan & Convert PDF Documents
Free

Transform any document or image into a high-quality digital file. This app offers automatic edge detection, multiple scan modes, and advanced editing tools like OCR, filters, and watermarking. Securely manage, share, and convert your files with ease.

Automatic document edge detectionDocument, ID, and Passport scan modesAI OCR for text recognition and copying
💼 Business
(39K)
subscription
8
Fill and Sign: PDF form filler
Fill and Sign: PDF form filler
Fill and Sign: PDF form filler
Edit documents, signature scan
Free

Easily fill out and digitally sign any PDF document on your mobile device. Scan or import documents, use smart autofill for quick data entry, and add your signature to complete forms in seconds. Share finished files securely.

Fill and sign PDF documentsScan and import documentsSmart AI autofill suggestions
🔧 Utilities
(97)
free with in-app purchases
9
PDF Max
PDF Max
PDF Max
Edit. Annotate. Fill PDF Forms
Free

This app allows you to read, annotate, and sign PDF documents on your mobile device. You can mark up text, add handwritten notes, insert stamps, fill out forms, and manage PDF pages. It also offers robust file management and cloud integration for seamless access to your documents.

Read and annotate PDFsFill and sign PDF formsHandwriting and text markup
📊 Productivity
(1.2K)
free with in-app purchases
10
Adobe Scan: PDF & OCR Scanner
Adobe Scan: PDF & OCR Scanner
Adobe Scan: PDF & OCR Scanner
Mobile Docs & Photo Converter
Free

Transform your mobile device into a powerful document scanner. Easily convert paper documents, receipts, and IDs into professional-looking PDFs or JPEGs. Enhance scans with automatic straightening, stain removal, and editable text conversion.

High-speed bulk scanningConvert paper to PDF/JPEGAutomatic straightening
💼 Business
(1.6M)
free with in-app purchases
11
Photo to PDF Convert Scanner +
Photo to PDF Convert Scanner +
Photo to PDF Convert Scanner +
Scan Document, Image, Receipt
Free

Transform your phone into a portable scanner to digitize documents, receipts, and images. Convert scanned content to various formats, extract text using OCR, and manage your files efficiently. Secure your documents with advanced features.

Quick document scanningConvert to TXT, PDF, JPEGOCR text recognition and editing
💼 Business
(26K)
free with in-app purchases
12
CamScanner - PDF Scanner App
CamScanner - PDF Scanner App
CamScanner - PDF Scanner App
Сканер текста,фото,файлов PDF
Free

Transform your mobile device into a powerful portable scanner. Instantly scan, edit, and share documents in various formats like PDF, JPG, Word, and TXT. Features include OCR, e-signatures, and secure file management.

Mobile document scanningText recognition (OCR)PDF conversion
📊 Productivity
(1.8M)
free with in-app purchases
13
Fill and Sign Documents: eSign
Fill and Sign Documents: eSign
Fill and Sign Documents: eSign
eSign Signature Maker & Editor
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
(4.7K)
free with in-app purchases
14
PDF Editor: Fill, Edit, e Sign
PDF Editor: Fill, Edit, e Sign
PDF Editor: Fill, Edit, e Sign
All PDF Files Scanner & Reader
Free

Easily edit, fill, and sign PDF documents on your mobile device. This app allows you to scan documents, convert them to PDF, and annotate files. Share your business contracts and important documents with advanced editing and signing capabilities.

Fill PDF formsScan documents to PDFEdit PDF files
💼 Business
(725)
subscription
15
PDF Viewer by Nutrient
PDF Viewer by Nutrient
PDF Viewer by Nutrient
Fill Forms, Sign, Edit, Redact
Free

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.

View and search PDFsAnnotate with highlights and notesSign documents digitally
📊 Productivity
(9.1K)
freemium
16
PDF Reader Pro: Scan & Sign
PDF Reader Pro: Scan & Sign
PDF Reader Pro: Scan & Sign
Edit, Merge, Convert & Fill
Free

This app allows you to read, edit, annotate, sign, and manage PDF documents on your iPhone and iPad. It includes features for scanning, merging, splitting, converting, and securing PDFs, with iCloud sync for seamless cross-device access.

PDF Viewer & ReaderScan Documents to PDFSign & Manage Signatures
💼 Business
(2)
free with in-app purchases
17
Scanner - Edit PDF & documents
Scanner - Edit PDF & documents
Scanner - Edit PDF & documents
Reader to Convert, Scan & Sign
Free

Easily scan, convert, and sign documents from your device. Organize your business and personal files with features like auto-detection, flash, and folder management. Edit, e-sign, and share your scanned documents quickly and efficiently.

Scan documents with auto-detectionConvert to PDF instantlyE-sign and paraph files
💼 Business
(12K)
freemium
18
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
19
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
20
RevPDF: PDF Editor & Reader
RevPDF: PDF Editor & Reader
RevPDF: PDF Editor & Reader
Edit, Sign, Draw & Fill Forms
Free

Edit, sign, and convert PDFs entirely offline without needing an account or cloud storage. This app allows direct text and image editing, form filling, and a suite of powerful PDF tools.

Edit text and images directly in PDFsFill and sign PDF formsCompress, merge, and split PDFs
🔧 Utilities
(8)
free