PDF Signature Pro vs StampDoc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Signature Pro
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Transform your mobile device into a powerful PDF signing tool with PDF Signer, the ultimate solution for digitally signing documents on the go. Whether you're a business professional, student, or anyone who needs to sign PDFs regularly, our app makes the process quick, secure, and effortless. Key Features: Easy PDF Signing Load any PDF document from your device Create custom digital signatures with your finger or stylus Place signatures precisely anywhere on your documents Navigate through multi-page documents with ease Professional Quality High-resolution signature rendering Maintains original PDF formatting and quality Scalable signatures that look crisp at any size Professional-grade document processing User-Friendly Interface Intuitive design that anyone can master in minutes Smooth signature drawing with responsive touch controls Clear visual feedback for all actions Simple navigation between pages and functions Secure and Private All processing happens locally on your device No cloud storage or data transmission required Your documents never leave your device Complete privacy and security for sensitive documents Versatile Document Support Compatible with all standard PDF formats Handles documents of any size and page count Maintains document integrity and structure Preserves all original content and formatting Save and Share Save signed documents directly to your device Share via email, messaging apps, or cloud services Organize signed documents in your preferred location Quick access to recently signed files Perfect For: Business contracts and agreements Legal documents and forms Employment paperwork Academic documents Personal correspondence Any PDF requiring a signature Why Choose PDF Signer: Our app eliminates the need for printing, signing, and scanning documents. Save time, reduce paper waste, and maintain professional standards with digital signatures that are legally recognized in most jurisdictions. The app features a clean, modern interface designed for efficiency. Whether you're signing a single page contract or a multi-page agreement, PDF Signer streamlines the entire process. Technical Excellence: Optimized for both smartphones and tablets Responsive performance with documents of all sizes Regular updates with new features and improvements Reliable functionality across all supported devices Free to Use: PDF Signer is completely free to download and use. The app is supported by carefully placed advertisements that don't interfere with your document signing workflow. Get Started Today: Download PDF Signer now and experience the convenience of digital document signing. Join thousands of users who have simplified their document workflow with our trusted PDF signing solution. Perfect for business professionals, freelancers, students, real estate agents, lawyers, contractors, and anyone who needs to sign documents regularly. Make PDF Signer your go-to solution for all digital signing needs. Download PDF Signer today and never worry about printing documents for signatures again.
StampDoc
Easily sign PDFs and images, create custom digital stamps, and manage your documents securely from your iPhone or iPad. Streamline your workflow by going fully digital, eliminating the need for printing and scanning.
- Sign PDFs and images
- Create custom digital stamps
- Signature editor and scanner
- Import and reuse stamps
- Built-in PDF and image viewer
- Save and share signed files
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Need to sign a contract, stamp an invoice or initial every page of an agreement? StampDoc turns your iPhone or iPad into a pocket signing and stamping office. No printing, no scanning, no complicated software. KEY FEATURES Sign PDFs and images Place your signature on PDFs and photos (JPG, PNG). Move, resize and rotate it until it fits perfectly. Ideal for contracts, invoices, agreements and forms. Draw your signature Draw it with your finger, choose the ink color and thickness, and save it for next time. Undo and redo stroke by stroke. Use your real signature or stamp Take a photo of your handwritten signature or company stamp, or import it from your photos, and use it on any document. Create your own stamps Design business stamps with your own text and color: circular, rectangular, diagonal and many more designs. Edit them anytime. Add text Add today's date, your name, initials, checkmarks and APPROVED, RECEIVED or PAID labels. Save and share Export signed documents as PDF or image, find them again in History, and share them by email, cloud storage or any messaging app. FREE AND PREMIUM StampDoc is free to download and includes ads. The free version lets you save one signature and one stamp, use the basic stamp designs, and place one signature and one stamp per document. Adding text is always free. StampDoc Premium removes ads and unlocks unlimited signatures and stamps, all stamp designs, background removal for photos of signatures and stamps, and repeating a signature or initials on other pages. Some of these extras can also be unlocked for free by watching a short video. Turn your iPhone or iPad into your mobile signing and stamping office. Download StampDoc today. Privacy Policy: https://www.amcompany.net/privacy-policy-stampdoc/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: PDF Signature Pro at every 6 weeks against StampDoc's every 3 months. PDF Signature Pro also leads on iOS requirement (12.0 vs 15). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PDF Signature Pro ships an update every 6 weeks, StampDoc every 3 months. The most recent releases landed on November 9, 2026 and October 30, 2026 respectively.
| Parameter | PDF Signature Pro | StampDoc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15 |
| Further details — not scored | ||
| Size | 41 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Ashen Ishanka Costha | Anyelo Moreno |
In-app purchases
PDF Signature Pro
No in-app purchases
StampDoc
No in-app purchases
Questions
Is PDF Signature Pro free?
Is StampDoc free?
Do PDF Signature Pro or StampDoc have ads?
Which is updated more often, PDF Signature Pro or StampDoc?
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