Comparison

SignPDF vs Sign Documents

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

Head to head
About

SignPDF

Easily sign and fill out PDF documents directly on your device without needing an account. Open PDFs from various cloud services, add your signature, text, and checkmarks, then share or save the completed document.

Highlights
  • Sign documents with your finger
  • Fill out PDF forms
  • Add name, initial, and date
  • Open PDFs from cloud storage
  • Export signed documents
  • Print documents via AirPrint
Features
Read full description

Sign documents anywhere with your iPhone/iPod/iPad! No account required! Need to sign or fill out a document? SignPDF makes it quick and easy to do both and forget about printing, scanning, or faxing. Simply: 1) Open any PDF from your iPhone, iPod or iPad’s Email, Dropbox, Google Drive, Box.Net, etc... 2) Fill out form with your name, initial, date, check boxes and sign realistically with your finger 3) Email the signed document to anyone, print it or upload to Dropbox, Google Drive, Box.Net, etc... SignPDF is typically use to sign and fill documents including NDA’s, sales agreements, celebrity endorsements, real estate contracts, financing agreements, permission slips, marriage documents, and more... *** Key Features: - Sign documents with just a finger - No need to print, sign, or fax documents again - Easily add name, initial, date, check boxes and signature to PDF - Your important docs stays with you on your device. We don't upload it our server! - No sign up process or account is needed. Simply sign docs! - Open documents from your email inbox, Dropbox, and more - Export documents to use in other apps - Printing - Print any document with AirPrint enabled printers Pro Version: - Will have 9 credits - No Advertisement How credits work: - Sign and share one document will consume 1 credit, no matter how many pages long the document is.

About

Sign Documents

Easily add signatures, text, and images to your PDF documents. This user-friendly tool offers real-time saving and an intuitive interface for quick document personalization. Ideal for students and professionals needing efficient PDF editing.

Highlights
  • Add signatures
  • Insert text
  • Add images
  • Real-time saving
  • Intuitive interface
  • Personalize documents
Features
Read full description

PDF Editor, a powerful and user-friendly tool designed to enhance your productivity. With this app, you can easily add signatures, text, and images to your PDF files. Our PDF Editor App allows you to personalize your documents in a few simple steps. Need to sign a document? No problem. You can add your signature swiftly and save it for future use. Want to annotate or add comments? You can type in text anywhere on the document. Need to add images? You can insert pictures with ease and adjust their size and position to fit your needs. But that's not all. Our app is designed with a clean and intuitive interface, making it easy even for beginners to navigate and use. Plus, all your edits are saved in real-time, ensuring you won't lose any changes. Whether you're a student, a professional, or someone who needs to work with PDFs, our PDF Editor App is the perfect tool for you. Download it now and experience the convenience and efficiency it brings to your work and daily life." Feel free to modify this to better suit your app's features and target audience. SUBSCRIPTION INFO: Subscribe to take advantage of the features described above. • Subscription length: monthly, yearly • Your payment will be charged to your iTunes Account as soon as you confirm your purchase. • You can manage your subscriptions and turn off auto-renewal from 'Settings > iTunes Account & App Store > Apple ID > Subscriptions' • Your subscription will renew automatically unless you turn off auto-renew at least 24 hours before the end of the current period. • The cost of renewal will be charged to your account 24 hours before the end of the current period. • When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded. Terms of use: https://docs.qq.com/doc/DRWhmR0VSaXJJWWVs Privacy policy: https://docs.qq.com/doc/DRWhmR0VSaXJJWWVs Inquiry: help4pdfsign@gmail.com

Screenshots

SignPDF4 screens
Sign Documents3 screens

Verdict

The call

The clearest difference is update cadence: Sign Documents at every 6 weeks against SignPDF's every 3 months. SignPDF's advantage is iOS requirement (6.0 vs 15.0). On price, rating, review sentiment and ratings volume 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. SignPDF sells 3 one-off in-app purchases and Sign Documents sells 2 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for SignPDF against 4.5 for Sign Documents. Both are backed by a comparable volume of ratings — 105 and 65 respectively. Written reviews are what separate them: 85% of SignPDF's written reviews are positive against 89% of Sign Documents's.

UpkeepUpdate frequency

SignPDF ships an update every 3 months, Sign Documents every 6 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
SignPDF versus Sign Documents: the parameters behind the verdict, then further details
ParameterSignPDFSign Documents
PriceFreeFree
Rating4.4 (105 ratings)4.5 (65 ratings) — better
Positive reviews85.1% of reviews88.9% of reviews — better
Number of ratings105 — better65
Update frequencyEvery 3 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS6.0 — better15.0
Further details — not scored
Size12 MB9 MB
Age rating4+4+
DeveloperTektrify, Inc晓峰 刘

Customer experience

SignPDF

All ratings105 ratings
Positive87.6%
Neutral2.9%
Negative9.5%
Written reviews101 reviews
Positive85.1%
Neutral2.0%
Negative12.9%

Sign Documents

All ratings65 ratings
Positive87.7%
Neutral3.1%
Negative9.2%
Written reviews27 reviews
Positive88.9%
Neutral0.0%
Negative11.1%

Bugs and requests

SignPDF

Reported bugs

10 issues
  • App crashes when saving or exporting documents
  • Signature placement doesn't match preview
  • App hangs after opening PDF files
  • Freezes on iOS 13.1.3 and newer versions
  • Grey screen loading issue on tablets and phones
Show 5 more
  • PDF export produces unreadable or smeared output
  • App stops working after purchase of paid credits
  • Missing from 'Open in' menu options
  • Fails to open PDFs from Google Drive after updates
  • Sample PDF reappears after deletion

Requested features

7 requests
  • Better credit system or ad-supported alternative
  • Automatic text and signature positioning
  • Ability to delete saved signatures
  • Sync functionality between iPhone and iPad
  • More advanced PDF editing features
Show 2 more
  • Free credits for positive reviews
  • Improved export options and formats

Sign Documents

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

SignPDF

One-time3
  • 6 Credits$1.99
  • 24 Credits$4.99
  • Unlimited Credits$19.99
2 purchases

Sign Documents

Subscriptions1
  • PDF Editor PRO3 Days trial$8.991 Month
One-time1
  • Forever Pro$14.99

Questions

Is SignPDF free?
SignPDF is free to download, with in-app purchases available.
Is Sign Documents free?
Sign Documents is free to download, with in-app purchases available.
Which has better reviews, SignPDF or Sign Documents?
Sign Documents is rated higher. SignPDF averages 4.4 out of 5 from 105 ratings, while Sign Documents averages 4.5 from 65 ratings.
Do SignPDF or Sign Documents have ads?
Neither SignPDF nor Sign Documents shows ads.
Which is updated more often, SignPDF or Sign Documents?
SignPDF ships an update every 3 months, and Sign Documents every 6 weeks. Most recently, SignPDF was updated on October 17, 2026 and Sign Documents on October 16, 2026.

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