Comparison

Sign PDF vs PDF Editor ,PDF Book Reader ®

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sign PDF

Easily add your signature to PDF documents using your device. Create signatures by taking a photo, using special fonts, drawing on screen, or importing an image. Export signed documents as PDFs or JPEGs, and print or share them directly.

Highlights
  • Apply signature to PDF
  • Export as PDF
  • PDF to JPEG conversion
  • Print from device
  • Share via email
  • Multiple signature creation modes
Features
Read full description

Sign a PDF and send it back in under a minute — without leaving your iPhone. Sign PDF is the fast, private way to sign documents, fill forms and get paperwork done. Import a PDF, tap where to sign, and share the finished file. No account, no uploads, no waiting. WHY YOU'LL LOVE IT • Sign any PDF or document in seconds • Everything happens on your device — nothing is ever uploaded • Works completely offline • No sign-up, no subscription required to get started • Exports a clean, flattened PDF — never watermarked SIGN YOUR WAY • Draw your signature with a finger or Apple Pencil • Snap a photo of your signature on paper — the background is removed automatically • Type your name in a handwritten-style font • Save multiple signatures and initials, then reuse them with one tap FILL & COMPLETE • Add free-form text boxes anywhere, with size and color control • Quick Fields: save your name, company, email and address once, insert them instantly • Date tool with auto-today and your preferred format • Add checkmarks and X-marks to tick boxes • Fill interactive form fields (AcroForm) IMPORT FROM ANYWHERE • Open PDFs straight from Mail, Files or iCloud Drive • Scan paper documents with your camera • Turn photos into a PDF EXPORT & SHARE • Flatten and share via the standard share sheet • Print, or save back to Files • The original document is never changed until you export FREE VS PRO Free: sign documents every month, one saved signature, text and date tools included, full-quality export. Pro unlocks: unlimited documents, the document scanner, photo and typed signature capture, multiple signatures and initials, Quick Fields and interactive form filling. PRIVACY FIRST Your documents are yours. Sign PDF has no backend and no account system. Files stay in the app, protected on your device, and are never sent to a server. Sign contracts, agreements and sensitive paperwork with total peace of mind — even in airplane mode. Download Sign PDF and turn your iPhone into a pocket signing tool. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://keysersoft.com/signpdf/privacy-policy

About

PDF Editor ,PDF Book Reader ®

This app offers a comprehensive suite of tools for managing PDF documents. It allows users to read, edit, annotate, convert, and scan PDFs with an intuitive interface. Features include form filling, digital signatures, page management, and robust sharing options across Apple devices.

Highlights
  • Read and edit PDFs
  • Annotate and markup documents
  • Fill forms and add digital signatures
  • Convert images and web pages to PDF
  • Scan documents with OCR
  • Organize and manage PDF library
  • Share via AirDrop and iCloud
Features
Read full description

PDF Editor, PDF Book Reader ® — Smart, Private, Made for Apple Intelligence Read, edit, sign, scan and organize PDFs in one app. Designed with Liquid Glass for iPhone, iPad, Mac, Apple Vision Pro and Apple Watch. APPLE INTELLIGENCE - Summaries: understand a long PDF in seconds. Summarize the whole document or one page. - Smart Categories: each PDF is sorted into a category, like Book, Manual, Receipt, Ticket or Contract, with an icon in your Library. Filter your Library by category in one tap. - Auto Labels: every PDF gets a short title of its subject, shown under its name. Edit any title, and search finds it too. - Suggested Tags: select a PDF and get up to three tag ideas from its content. Tap one to add it. - Private by design: all Apple Intelligence features run on your device. Your documents never leave it. SIRI AND SHORTCUTS Just ask Siri: - "Summarize my PDF with PDF Editor" - "Open PDF in PDF Editor" - "Search my documents in PDF Editor" - "Scan text with PDF Editor" Build Shortcuts to import files, load a PDF from the camera or iCloud, download a PDF from a link, open documents and rotate pages. READ AND LISTEN - Crisp, high-resolution display with smooth zoom. - Book mode with realistic page curl, and two facing pages in landscape. - Read Aloud in natural voices, with each word highlighted as it is spoken. Choose the speed, voice and language. - Translate the current page with Apple Translate. - Search the text of every PDF, and even your handwritten notes (iOS 27). - Full Dark Mode support. EDIT AND ANNOTATE - Highlight, underline and add notes anywhere. - Draw with Apple Pencil or your finger in any color. - Add text boxes, shapes, images and photos. - Fill forms, and create and place signatures. - Rotate, insert, delete and reorder pages. - Annotate together in real time with SharePlay. SCAN AND CONVERT - Scan receipts, notes, contracts and multi-page documents with automatic edge detection. - Instant Text (OCR): turn images and scans into text. - Convert photos, images and web pages into PDFs. - Export to HEIC, JPEG, PNG, Word (.docx), TIFF and PDF. - Create professional invoices and share them as PDFs. - Scan from Control Center or the Camera Control button. ORGANIZE YOUR LIBRARY - Categories: choose a category for any PDF yourself, on any device, and filter by it. - Color tags, with a simple Tags button to assign and manage them. - Sort by name, date, size or tag. - Select many PDFs at once to share, tag, categorize, back up or delete. - Recently Deleted keeps removed PDFs so you can restore them. - Zip, print and share via AirDrop, Messages, Mail and more. EVERYWHERE YOU ARE - iCloud sync across all your Apple devices. - Made for iPhone Duo: a book opens across both halves when you unfold. - Widgets, including a reading streak calendar. - Apple Watch app and iMessage app. - One purchase unlocks all your devices. PRIVACY AND ACCESSIBILITY - No data collected. Your documents stay yours. - Built for VoiceOver, Dynamic Type and Reduce Motion. - Available in 19 languages. PLANS - Subscribe monthly, every 3 months or yearly — try Yearly free first. - Or choose Lifetime: pay once and keep every feature forever. No subscription, nothing renews. PRICE AND TERMS Lifetime is a one-time purchase and does not renew. For subscriptions, payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. Manage or cancel your subscription at any time in your Apple Account settings, or with "Subscription" in the app's settings menu. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use: https://pdfeditorpdfbookreader.app/terms Privacy Policy: https://pdfeditorpdfbookreader.app/privacy

Screenshots

Sign PDF4 screens
PDF Editor ,PDF Book Reader ®4 screens

Verdict

The call

The clearest difference is review sentiment: PDF Editor ,PDF Book Reader ® at 83% against Sign PDF's 7%. PDF Editor ,PDF Book Reader ® also leads on update cadence (every 3 days vs every 69 months) and device support (5 vs 2). Sign PDF's advantage is monetization model (free vs free with in-app purchases). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sign PDF sells 3 in-app purchases, starting at $3.99 per 7 days and PDF Editor ,PDF Book Reader ® sells 6 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Sign PDF ships an update every 69 months, PDF Editor ,PDF Book Reader ® every 3 days. The most recent releases landed on October 24, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
Sign PDF versus PDF Editor ,PDF Book Reader ®: the parameters behind the verdict, then further details
ParameterSign PDFPDF Editor ,PDF Book Reader ®
PriceFreeFree
Rating—4.3 (22K ratings) — better
Positive reviews7.1% of reviews82.8% of reviews — better
Number of ratings—22K — better
Update frequencyEvery 69 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch, Vision Pro — better
Requires iOS17.017.0
Further details — not scored
Size3 MB36 MB
Age rating4+4+
DeveloperMatteo MorelliMilad Fakhr

Customer experience

Sign PDF

Written reviews14 reviews
Positive7.1%
Neutral0.0%
Negative92.9%

PDF Editor ,PDF Book Reader ®

All ratings22,242 ratings
Positive82.0%
Neutral3.0%
Negative15.0%
Written reviews488 reviews
Positive82.8%
Neutral0.6%
Negative16.6%

Bugs and requests

Sign PDF

Not enough reviews yet to summarise bugs or requests.

PDF Editor ,PDF Book Reader ®

Reported bugs

2 issues
  • Text not saving properly after editing
  • Difficulty accessing documents at the bottom of PDFs

Requested features

4 requests
  • Add folder organization for PDFs
  • Improve text editing and input responsiveness
  • Provide more customization options for PDF viewing
  • Integrate with cloud storage services

In-app purchases

3 purchases

Sign PDF

Subscriptions2
  • Firma Pro Weekly3 Days trial$3.997 Days
  • Firma Pro Yearly$22.991 Year
One-time1
  • Firma Pro Lifetime$49.99
6 purchases

PDF Editor ,PDF Book Reader ®

Subscriptions3
  • Monthly Subscription$9.991 Month
  • Quarterly Subscription$19.993 Months
  • Yearly Subscription7 Days trial$49.991 Year
One-time3
  • Scanner (OCR)$3.99
  • PDF Editor Creator & Scanner$49.99
  • Lifetime Access$99.99

Questions

Is Sign PDF free?
Sign PDF is free to download, with in-app purchases available.
Is PDF Editor ,PDF Book Reader ® free?
PDF Editor ,PDF Book Reader ® is free to download, with in-app purchases available.
Do Sign PDF or PDF Editor ,PDF Book Reader ® have ads?
Neither Sign PDF nor PDF Editor ,PDF Book Reader ® shows ads.
Which is updated more often, Sign PDF or PDF Editor ,PDF Book Reader ®?
Sign PDF ships an update every 69 months, and PDF Editor ,PDF Book Reader ® every 3 days. Most recently, Sign PDF was updated on October 24, 2026 and PDF Editor ,PDF Book Reader ® on November 1, 2026.

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