Best Fill PDF Apps

250+ iOS apps curated and reviewed

4.4 avg rating
18 free apps
Updated September 2026

Acrobat Reader is the household name in fill pdf, 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 Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Acrobat Reader: PDF EditorAcrobat Reader: PDF EditorFree4.6★ (651K)NoYesSep 2026
2PDF Expert: Editor & ReaderPDF Expert: Editor & ReaderFree4.7★ (216K)NoYesSep 2026
3PDF Fill & Sign. Editor FillerPDF Fill & Sign. Editor FillerFree4.6★ (6.5K)NoYesSep 2026
4pdfFiller: edit PDF documentspdfFiller: edit PDF documentsFree4.4★ (8.5K)NoYesSep 2026
5Form Filler: fill & sign formsForm Filler: fill & sign formsFree4.6★ (32K)NoNoSep 2026
6Fill and Sign Documents: eSignFill and Sign Documents: eSignFree4.3★ (4.9K)YesYesSep 2026
7SparkPDF: Scan, Sign & FillSparkPDF: Scan, Sign & FillFree5.0★ (1)YesYesSep 2026
8PDF Editor: Fill, Sign & ScanPDF Editor: Fill, Sign & ScanFreeNoNoJul 2026

Top Picks for Fill PDF

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
PDF Expert: Editor & Reader#2

PDF Expert: Editor & Reader by Readdle Technologies Limited

Create, Edit & Sign Documents
Strong Contender
📊 Productivity
4.7😐(216K ratings)
FreeIn-App Purchases
#57in Productivity
PDF Expert: Editor & Reader screenshot 1
PDF Expert: Editor & Reader screenshot 2
PDF Expert: Editor & Reader screenshot 3
PDF Expert: Editor & Reader screenshot 4
PDF Expert: Editor & Reader screenshot 5
PDF Expert: Editor & Reader 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
  • 📚 Excellent for reading and organizing PDFs

Room to Improve

  • 🐛 Frequent crashes and stability issues
  • 🔒 Subscription model for advanced features
  • 🔒 Inconsistent pricing and feature changes
  • 🔍 Cluttered and confusing UI in latest update
  • 🔍 Reduced customization options for annotations
PDF Fill & Sign. Editor Filler#3

PDF Fill & Sign. Editor Filler by 7270356 Canada Inc

Document Reader and Signer
Worth Considering
💼 Business
4.6😐(6.5K ratings)
FreeIn-App Purchases
PDF Fill & Sign. Editor Filler screenshot 1
PDF Fill & Sign. Editor Filler screenshot 2
PDF Fill & Sign. Editor Filler screenshot 3
PDF Fill & Sign. Editor Filler screenshot 4
PDF Fill & Sign. Editor Filler screenshot 5
PDF Fill & Sign. Editor Filler screenshot 6

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.

What We Love

  • 🚀 Easy to use
  • 🚀 Convenient for work and business documents
  • 🚀 Useful app for managing files
  • 🚀 Intuitive design and modern feel
  • 🚀 Affordable compared to other PDF editors

Room to Improve

  • 🐛 Crashes frequently
  • 🐛 Issues with text alignment and editing
  • 🐛 Incompatible with some PDF files
  • 🐛 Small viewing area on mobile devices
  • 💰 Misleading about free features

More Fill PDF apps to explore

FAQ about Fill PDF

What are the best fill pdf apps for iPhone?
Acrobat Reader: PDF Editor tops our fill pdf apps ranking as of September 2026, with a 4.6-star average from 651K App Store ratings, and it's free to download.
Yes — 18 of the top fill pdf apps we rank are free to download, including Acrobat Reader: PDF Editor and PDF Expert: Editor & Reader.
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 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.

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