Comparison

pdfFiller vs Sign PDF Documents

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

Head to head
About

pdfFiller

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.

Highlights
  • Edit PDF documents
  • Esign and fill out forms
  • Share and collaborate on documents
  • Securely store unlimited documents
  • Access millions of fillable templates
  • Work offline
Features
Currently charting
Read full description

pdfFiller is a powerful mobile app that transforms your iOS device into a fully equipped office. With an extensive set of features, you can edit, eSign, and manage an unlimited number of PDF documents from anywhere. Try pdfFiller to see how it can revolutionize the way you work. “pdfFiller does more than just bring a few new editing tricks to PDFs. Actually, this PDF app can add extra depth to the way we interact with these popular files.” — CultOfMac.com “The app is easy to use, lets you organize files into folders, and connects to Dropbox, Google Drive, Box, and OneDrive.” — MakeUseOf.com EDIT PDF DOCUMENTS • Easily edit any PDF contract, invoice, or tax form on your mobile device • Highlight content, erase, or blackout sensitive information in the documents • Use various annotation tools to add text, images, dates, check marks, and more ESIGN AND FILL OUT FILLABLE FORMS • Quickly eSign contracts, agreements, and deals with just a few taps • Send an unlimited number of documents for signing • Create your signature or initials by drawing them on your device’s screen SHARE AND EXPORT • Invite others to collaborate by sharing documents by email, link, or text message • Set permissions for the recipients allowing them to view, edit, or sign the document • Print, fax, and save documents as Word, Excel, and PowerPoint files STORE AN UNLIMITED NUMBER OF DOCUMENTS • Protect your documents with the same level of security and encryption used in the banking industry • Keep your documents up-to-date on all your devices and access them from a smartphone, laptop, or tablet • Start working on a document on one device and pick it up on another one using your pdfFiller account FIND FILLABLE TEMPLATES • Search among millions of ready-to-fill templates in our PDF Library • Add templates to your account and use them as many times as you need • Create professional-looking documents using high-quality business and legal templates OFFLINE MODE • Turn on offline mode to work on documents without interruptions • View, edit, and eSign documents even without an internet connection • Sync the changes you made when you’re back online 7-DAY FREE TRIAL • Try out all paid features free for 7 days • Select a plan that best suits your needs • Cancel anytime without any obligations Subscription will be charged to your credit card through your App Store account. Your subscription will automatically renew unless canceled at least 24 hours before the end of the current period. Manage your subscription in the Account Settings on the App Store after purchase. Terms of use: https://www.pdffiller.com/en/terms_of_services.htm Privacy policy: https://www.pdffiller.com/mobile/privacy_policy.html We appreciate your feedback, so please email us at support@pdffiller.com

About

Sign PDF Documents

Easily sign documents like PDFs and other files directly from your device. Scan, capture, or create custom signatures to apply to your files. Manage and share all your signed documents with this offline app.

Highlights
  • Sign documents from files
  • Sign documents from iCloud
  • Sign documents from photos
  • Scan and sign documents
  • Create and capture signatures
  • Edit PDFs with signatures
  • Share signed documents
  • Manage signed documents
Features
Read full description

Sign PDF documents, contracts, and forms in seconds with E-Signature — the fastest electronic signature app for iPhone and iPad. Add your digital signature to any PDF, eSign agreements, and scan paper documents without printing, faxing, or scanning hassle. Pick PDFs from Files, iCloud, Photos, or paste a URL. Scan paper documents with your camera and convert them to PDF instantly. Open any PDF or image directly from the Files app or other apps and start signing immediately. Everything stays private. Your documents and signatures are stored locally on your device — your data never leaves your iPhone or iPad. KEY FEATURES Sign PDF documents from Files, iCloud, Photos, or URLs Open PDFs and images directly from the Files app Scan paper documents with your camera and sign them Draw your signature or type it with 20+ handwriting fonts Capture a paper signature using your camera Use the built-in signature generator to create signatures instantly Add stamps, text, dates, and watermarks to any PDF Generate AI summaries and key points from any document — powered by on-device Apple Intelligence Control the document signer with Siri Shortcuts and voice commands Save and manage multiple signatures with favorites Browse, rename, and share all signed documents Dark Mode support Works completely offline — no internet required WHY CHOOSE E-SIGNATURE Faster than web-based signing tools — sign right on your iPhone No account, no signup, no cloud — open the app and sign The only document signer with built-in scanning, AI summaries, and Apple Watch support Trusted digital signature app for freelancers, founders, and small business owners SIRI SHORTCUTS "Sign a PDF" — opens the file picker "Scan and Sign" — launches the document scanner "Sign from Photos" — pick an image to sign "Open Last Document" — jump back to your most recent file "Show My Signatures" — view all saved signatures PERFECT FOR Signing contracts and NDAs on the go eSigning rental agreements and lease documents Adding electronic signatures to invoices and proposals Signing offer letters, consent forms, and authorization papers Quick PDF edits with text, stamps, and annotations SUBSCRIPTION DETAILS E-Signature offers auto-renewable subscriptions to unlock premium features: Weekly & Monthly Subscription along with Free trial availability Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription will automatically renew unless cancelled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the cost of the chosen plan. You can manage or cancel your subscription anytime in your Apple ID Account Settings. Privacy Policy: https://esign-pdf-documents.nextpixelapps.app/privacy Terms of Service: https://esign-pdf-documents.nextpixelapps.app/terms

Screenshots

pdfFiller4 screens
Sign PDF Documents4 screens

Verdict

The call

The clearest difference is rating: Sign PDF Documents at 4.9 against pdfFiller's 4.4. pdfFiller's advantage is ratings volume (8.5K vs 55) and chart position (#61 vs unranked). On price, update cadence, ads and in-app purchases 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. pdfFiller sells 10 in-app purchases, starting at $19.99 per month and Sign PDF Documents sells 6 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sign PDF Documents holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: pdfFiller has 8.5K ratings behind it against 55, so its average is the more settled of the two.

UpkeepUpdate frequency

pdfFiller ships an update fortnightly, Sign PDF Documents every 3 weeks. The most recent releases landed on September 24, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 7 level
pdfFiller versus Sign PDF Documents: the parameters behind the verdict, then further details
ParameterpdfFillerSign PDF Documents
PriceFreeFree
Rating4.4 (8.5K ratings)4.9 (55 ratings) — better
Positive reviews19.9% of reviews—
Number of ratings8.5K — better55
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
Best chart rank#61 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Apple Watch
Requires iOS15.0 — better17.0
Further details — not scored
Size178 MB89 MB
Age rating4+4+
DeveloperairSlate, Inc.NextPixel apps

Customer experience

pdfFiller

All ratings8,461 ratings
Positive85.6%
Neutral2.6%
Negative11.9%
Written reviews582 reviews
Positive19.9%
Neutral2.1%
Negative78.0%

Sign PDF Documents

All ratings55 ratings
Positive98.2%
Neutral0.0%
Negative1.8%

Bugs and requests

pdfFiller

Reported bugs

4 issues
  • Text/annotations not saving correctly
  • Freezing/crashing issues
  • Incompatibility with certain devices
  • Login/account issues

Requested features

5 requests
  • Undo/redo functionality
  • Ability to control opacity of annotations
  • Better file management options
  • Improved mobile experience
  • Clearer pricing and subscription details

Sign PDF Documents

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

pdfFiller

Subscriptions10
  • PDF editor • Basic Monthly$19.991 Month
  • PDF editor • Basic Monthly7 Days trial$19.991 Month
  • PDF editor • Plus Monthly$29.991 Month
Show 7 more
  • PDF editor • Plus Monthly7 Days trial$29.991 Month
  • PDF editor • Premium Monthly7 Days trial$39.991 Month
  • Premium Monthly$39.991 Month
  • PDF editor • Basic Annual7 Days trial$95.991 Year
  • PDF editor • Basic Annual$95.991 Year
  • PDF editor • Plus Annual7 Days trial$119.991 Year
  • PDF editor • Premium Annual7 Days trial$179.991 Year
6 purchases

Sign PDF Documents

Subscriptions6
  • PDF Signature weekly plan$4.997 Days
  • Sign PDF Documents with Esign3 Days trial$4.997 Days
  • Sign PDF Documents with Esign$5.997 Days
Show 3 more
  • E-signature documents & PDF$6.997 Days
  • Document sign now - Monthly3 Days trial$7.991 Month
  • PDF Signature - eSign App3 Days trial$9.991 Month

Questions

Is pdfFiller free?
pdfFiller is free to download, with in-app purchases available.
Is Sign PDF Documents free?
Sign PDF Documents is free to download, with in-app purchases available.
Which has better reviews, pdfFiller or Sign PDF Documents?
Sign PDF Documents is rated higher. pdfFiller averages 4.4 out of 5 from 8.5K ratings, while Sign PDF Documents averages 4.9 from 55 ratings.
Do pdfFiller or Sign PDF Documents have ads?
Neither pdfFiller nor Sign PDF Documents shows ads.
Which is updated more often, pdfFiller or Sign PDF Documents?
pdfFiller ships an update fortnightly, and Sign PDF Documents every 3 weeks. Most recently, pdfFiller was updated on September 24, 2026 and Sign PDF Documents on September 10, 2026.

Other comparisons