Easily sign PDF documents using your digital certificate or a handwritten signature. Scan paper documents into PDFs, apply your signature precisely, and securely export signed copies without altering the original file. Unlock saved passwords with Face ID for added convenience.
1.17
September 1, 2026
Fixed: signing a PDF that already carries a signature from Adobe Acrobat, Microsoft Word or an e-signature service (compressed PDF structure) failed with “This signed PDF cannot be updated safely.” Such documents can now be counter-signed. Fixed: an intermittent “The signature page reference could not be resolved.” error when signing larger documents.
MoreUnlimited signing, billed weekly.
$39.99
Lifetime
Unlimited signing forever. One-time payment.
Thank you so much for the fantastic review! We’re delighted that the app gives you a straightforward way to sign PDFs with your PFX certificate.
Sign PDF by Certificate supports .p12 and .pfx certificate files for digital signing. This allows for secure and verifiable electronic signatures on your documents.
Yes, you can draw a handwritten signature directly within the app when a digital certificate is not required or preferred. This offers flexibility for various signing needs.
Yes, the app includes functionality to scan paper documents and convert them into PDF format, which can then be signed digitally or by hand.
Sign PDF by Certificate utilizes Face ID to unlock saved passwords, providing a secure and convenient way to access your credentials when needed.
Sign PDF by Certificate offers a weekly subscription for $0.99 and a monthly subscription for $2.99. These plans provide access to premium features and services.
Yes, Sign PDF by Certificate is supported on Mac, iPhone, and iPad, allowing you to manage and sign documents across your Apple ecosystem.
The app was last updated on July 22, 2026, with version 1.15. This indicates a recent update, suggesting ongoing development and support.
Sign PDF by Certificate has an age rating of 4+, making it suitable for a wide range of users. This rating suggests minimal content concerns.
