Comparison

pdfFiller vs Sign.Plus

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.Plus

This app provides a secure and legally-binding electronic signature solution for signing documents on mobile devices. It allows users to fill and sign PDFs, scan paper documents, and send documents to others for signature with tamper-proof audit trails.

Highlights
  • Fill and sign documents
  • Send documents for signature
  • Tamper-proof audit trails
  • Legally-binding electronic signatures
  • Paper scanning to digital
  • Data encryption
Features
Read full description

Sign.Plus is a legally-binding electronic signature solution to sign documents on iPhone and iPad devices and send documents for signature. It’s secure, reliable, cross-platform, and super easy to use. Using this free eSignature app, you can fill and sign PDF documents, Word documents, and other types of supported documents. You can also utilize the paper scanning feature to convert your paper documents to digital documents and sign them electronically. √ Sign.Plus recognized as the best e-Signature solution to fill and sign documents! ◆ Fill and sign documents: Sign.Plus allows you to create an electronic signature to e-sign documents wherever you are and whenever you want. You can draw a signature, type your signature or use your initials. ◆ Send documents for signature: Other than the option to fill and sign documents yourself, you can also send documents for signature. You can send a request for signature even if the signees do not have a Sign.Plus account. You can add various fields to the documents, including signature, initials, date, text, and checkbox. ◆ Tamper-proof audit trails: For every document that goes into the process of signing electronically, there are real-time logs to keep track of any activity that has occurred with information such as name, IP address, email address, device, and much more. The audit trails are non-editable and each document action is thoroughly tracked and time-stamped, serving as legal proof of receipt, review, and signature. ◆ Legally-binding electronic signature: Sign.Plus complies with electronic signature regulations such as ESIGN, eIDAS, and ZertES to ensure it delivers the same legal standing as pen-and-paper signatures. ► Extensive security measurements and compliance offerings ◆ Data encryption: We encrypt all documents at rest using 256-bit Advanced Encryption Standard (AES), with each user’s unique encryption key. Furthermore, to protect data in transit between our apps (currently mobile, API, web) and our servers, we use TLS 1.2+ encryption. ◆ Various compliance offerings: We are committed to certifying ourselves and our e-signing platform for all relevant certifications and compliances, including SOC 2, HIPAA, ISO 27001, GDPR, CCPA, and more. ► Looking for an easy way to e-sign PDF documents? We’ve got you covered If you are looking for a secure document signing app to fill and sign PDF documents, we are here to help. This free eSignature app offers the easiest online signature experience ever, unlike other form filling and e-sign applications. You can sign PDF docs, contracts, leases, NDAs, agreements, and pretty much every type of legal document without having to go through a complicated process. Download Sign.Plus for free on your iOS device, scan/import the document you wish to sign/be signed electronically and, depending on the nature of the document, e-sign it yourself or send it for signature. Sign.Plus features and advantages: • Legally-binding electronic signature solution • Advanced yet easy-to-use document signing platform • Fill and sign PDF documents • Send documents for signature • Create an electronic signature (Type, draw, or use initials) • Extensive regulatory compliance offerings, including SOC 2, HIPAA, ISO 27001, GDPR, CCPA, and more • Scan documents with your mobile camera (automatic document detection, magnifier, border cropping, perspective correctness) • Data encryption • Tamper-proof audit trails • Save documents as draft • Get real-time notifications • Multiple date formats • Free e signature app to sign documents on iPhone and iPad * Sign.Plus is HIPAA compliant, provided the user has advanced security controls activated and enters into a business associate agreement (BAA) with Sign.Plus. Advanced security controls are available on the Enterprise plan tier. Any further questions or requests? Do not hesitate to reach us on our website, app, or by email at support@sign.plus. Our customer support team will be pleased to help you!

Screenshots

pdfFiller4 screens
Sign.Plus4 screens

Verdict

The call

The clearest difference is review sentiment: Sign.Plus at 86% against pdfFiller's 20%. Sign.Plus also leads on rating (4.8 vs 4.4). pdfFiller's advantage is ratings volume (8.5K vs 281) and chart position (#60 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.Plus sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sign.Plus holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: pdfFiller has 8.5K ratings behind it against 281, so its average is the more settled of the two. Written reviews point the same way: 20% of pdfFiller's written reviews are positive against 86% of Sign.Plus's.

UpkeepUpdate frequency

pdfFiller ships an update fortnightly, Sign.Plus every 3 weeks. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 7 level
pdfFiller versus Sign.Plus: the parameters behind the verdict, then further details
ParameterpdfFillerSign.Plus
PriceFreeFree
Rating4.4 (8.5K ratings)4.8 (281 ratings) — better
Positive reviews19.9% of reviews85.7% of reviews — better
Number of ratings8.5K — better281
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#60 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size178 MB129 MB
Age rating4+4+
DeveloperairSlate, Inc.Alohi

Customer experience

pdfFiller

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

Sign.Plus

All ratings281 ratings
Positive95.0%
Neutral1.1%
Negative3.9%
Written reviews49 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

User reviews

pdfFiller

From 8.5K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Makes virtual work easy
  • 💡 Great customer service/support
  • 👍 Simple and organized
  • 👍 Helpful for PDF management

Room to improve

  • 🐛 Buggy and glitchy
  • 💰 Expensive subscription
  • 🔒 Concerns about privacy and security
  • 🤥 Misleading/deceptive advertising
  • 🔒 Difficult to cancel subscription

Sign.Plus

From 281 App Store ratings

What we love

  • 👍 Easy to use interface
  • 🚀 Efficient document signing
  • 🔒 Secure document handling
  • 💡 Scans everything easily
  • 👍 Convenient for quick signatures

Room to improve

  • 🐛 Horrible app interface
  • 🐛 Difficult to use on phone
  • 🐛 Bait and switch tactics
  • 🐛 Tricky to unsubscribe
  • 🐛 App not working

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.Plus

Reported bugs

3 issues
  • App not working
  • Freezes occasionally
  • Support obstructing work

Requested features

2 requests
  • Ability to send documents out
  • Improved phone interface

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
4 purchases

Sign.Plus

One-time4
  • Personal Plan (One Month)$14.99
  • Premium Plan (One Month)$29.99
  • Personal Plan (One Year)$119.99
Show 1 more
  • Professional Plan (One Year)$239.99

Questions

Is pdfFiller free?
pdfFiller is free to download, with in-app purchases available.
Is Sign.Plus free?
Sign.Plus is free to download, with in-app purchases available.
Which has better reviews, pdfFiller or Sign.Plus?
Sign.Plus is rated higher. pdfFiller averages 4.4 out of 5 from 8.5K ratings, while Sign.Plus averages 4.8 from 281 ratings.
Do pdfFiller or Sign.Plus have ads?
Neither pdfFiller nor Sign.Plus shows ads.
Which is updated more often, pdfFiller or Sign.Plus?
pdfFiller ships an update fortnightly, and Sign.Plus every 3 weeks. Most recently, pdfFiller was updated on September 24, 2026 and Sign.Plus on September 25, 2026.

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