Comparison

PDF Scanner ⋅ vs Sign PDF

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

Head to head
About

PDF Scanner ⋅

Easily scan, edit, and sign PDF documents directly from your phone. Features include auto-cropping, form filling, highlighting, and printing capabilities. Organize and manage your scanned documents efficiently.

Highlights
  • Document scanning with auto-cropping
  • Edit and fill PDF forms
  • Markup and highlight PDFs
  • Digital signature functionality
  • Organize and save scans
  • Print PDFs wirelessly
Features
Read full description

PDF Scanning App is the simple and easy way to scan & edit pdf documents from your phone. Features include: • Point and shoot PDF document camera scanning • Edit and fill out PDF document forms fields • Markup and highlight PDF documents • Sign PDF documents with your signature • Save and organize your PDF scans • Print PDF scans over Wifi to Printer • Supports AirPrint and other printing protocols • Auto document surface detection and cropping • Simple and easy to use Terms of Use: https://silverelmsys.com/pdfscanner/terms_of_use.html Privacy Policy: https://silverelmsys.com/pdfscanner/privacy_policy.html

About

Sign PDF

Easily and securely sign PDF documents directly from your mobile device. Add notes and comments to PDFs and share them quickly. Ideal for on-the-go document signing.

Highlights
  • Sign PDF documents quickly
  • Secure and reliable signing
  • Intuitive user interface
  • Add notes and comments
  • Share signed PDFs easily
  • Sign on the go
Features
Read full description

Sign PDF Document turns your iPhone and iPad into a complete PDF office: sign contracts in seconds, fill out forms, scan paper documents and keep everything organized — without printing a single page. SIGN, YOUR WAY • Draw your signature with your finger or Apple Pencil and place it anywhere on the page • Sign with a digital certificate (PAdES): import your .p12 or create one right in the app • Add initials, dates, checkmarks and text • Your signatures are stored securely on your device, ready to reuse FILL AND EDIT • Fill out interactive PDF forms • Add text, highlights and annotations • Stamp images onto any page SCAN AND CONVERT • Scan paper documents with your camera, with automatic edge detection • Run OCR to turn scans into searchable text • Convert Word documents and photos to PDF ORGANIZE AND PROTECT • Merge several PDFs into one and reorder, rotate or delete pages • Compress heavy PDFs so they are easy to share • Lock documents with a password — or remove a password you know CLOUD AND AI • Open and save files in iCloud, Google Drive and OneDrive • Ask the built-in AI Assistant about the document you are reading: summaries, answers, key data in seconds MADE FOR REAL LIFE • Available in 45 languages • The core tools work offline: your documents stay on your device unless you decide to share them PREMIUM FOR LIFE — NO SUBSCRIPTIONS One single purchase unlocks everything, forever. No recurring payments, no account required. A lease, an invoice, a school form or a job contract: sign it and send it back before your coffee gets cold.

Screenshots

PDF Scanner ⋅4 screens
Sign PDF4 screens

Verdict

The call

The clearest difference is ads: PDF Scanner ⋅ at none against Sign PDF's shown. PDF Scanner ⋅ also leads on iOS requirement (14.1 vs 16.0). Sign PDF's advantage is rating (4.9 vs 4.6) and update cadence (every 6 days vs fortnightly). On price, ratings volume, in-app purchases and device support 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. PDF Scanner ⋅ sells 1 one-off in-app purchase and Sign PDF sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sign PDF holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 10 and 18 respectively.

UpkeepUpdate frequency

PDF Scanner ⋅ ships an update fortnightly, Sign PDF every 6 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 5 level
PDF Scanner ⋅ versus Sign PDF: the parameters behind the verdict, then further details
ParameterPDF Scanner ⋅Sign PDF
PriceFreeFree
Rating4.6 (10 ratings)4.9 (18 ratings) — better
Positive reviews—25.0% of reviews
Number of ratings1018 — better
Update frequencyFortnightlyEvery 6 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.1 — better16.0
Further details — not scored
Size12 MB75 MB
Age rating4+4+
DeveloperSilver Elm Systems LLCRaquel Martinez Figueirido

Customer experience

PDF Scanner ⋅

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%

Sign PDF

All ratings18 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

1 purchases

PDF Scanner ⋅

One-time1
  • PDF Scanner Premium$29.99
1 purchases

Sign PDF

One-time1
  • Premium Plan$9.99

Questions

Is PDF Scanner ⋅ free?
PDF Scanner ⋅ is free to download, with in-app purchases available.
Is Sign PDF free?
Sign PDF is free to download, with in-app purchases available.
Which has better reviews, PDF Scanner ⋅ or Sign PDF?
Sign PDF is rated higher. PDF Scanner ⋅ averages 4.6 out of 5 from 10 ratings, while Sign PDF averages 4.9 from 18 ratings.
Do PDF Scanner ⋅ or Sign PDF have ads?
Sign PDF shows ads; PDF Scanner ⋅ does not.
Which is updated more often, PDF Scanner ⋅ or Sign PDF?
PDF Scanner ⋅ ships an update fortnightly, and Sign PDF every 6 days. Most recently, PDF Scanner ⋅ was updated on October 24, 2026 and Sign PDF on October 27, 2026.

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