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Best Fill PDF Free Apps

250+ iOS apps curated and reviewed

4.8 avg rating
20 free apps
Updated September 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 (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Acrobat Reader: PDF EditorAcrobat Reader: PDF EditorFree4.6★ (651K)NoYesSep 2026
2Form Filler: fill & sign formsForm Filler: fill & sign formsFree4.6★ (32K)NoNoSep 2026
3PDF Editor: Fill, Sign & ScanPDF Editor: Fill, Sign & ScanFree—NoNoJul 2026
4pdfFiller: edit PDF documentspdfFiller: edit PDF documentsFree4.4★ (8.5K)NoYesSep 2026
5DocFill – PDF Editor & MergerDocFill – PDF Editor & MergerFree—NoYesAug 2026
6PDF Gear - PDF Editor & ReaderPDF Gear - PDF Editor & ReaderFree4.7★ (8.5K)NoNoSep 2026
7PDF Fill & Sign. Editor FillerPDF Fill & Sign. Editor FillerFree4.6★ (6.5K)NoYesSep 2026
8PDF Reader: Edit & SignPDF Reader: Edit & SignFree5.0★ (1)YesYesSep 2026

Top Picks for Fill PDF Free

Acrobat Reader: PDF Editor#1

Acrobat Reader: PDF Editor by Adobe Inc.

Documents Converter & Signer
Editor's Choice
💼 Business
4.6😞(651K 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
  • 👎 Counterintuitive user interface changes
  • 🔍 Poor search and organization features
Form Filler: fill & sign forms#2

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

Create and Edit pdf documents
Strong Contender
📊 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
  • 📱 Not optimized for mobile devices

More Fill PDF Free apps to explore

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 September 2026, with a 4.6-star average from 651K 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 September 2026.
We track 250+ fill pdf free apps on the iOS App Store as of September 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.