SimplySign and proCertum SmartSign - together or separately? How do they work and what are they used for?

Are you using a qualified signature, or maybe you are just planning to implement one and are wondering which applications you will need? The SimplySign application or the proCertum SmartSign program? Do you need both? Or just one? Today we explain how these two programs differ, what they are used for, when they work together and when - completely separately.
SimplySign and proCertum SmartSign - together or separately? How do they work and what are they used for?
3-minute read Updated: August 18, 2026

What is SimplySign?

SimplySign is a qualified electronic signature, which is used by the mobile application of the same name (for Android and iOS), which allows you to make a qualified electronic signature without the need for a cryptographic card and reader. It is independent of a computer. The private key is stored in the cloud, and the signature operation is confirmed in the mobile app with a PIN. In short: instead of a physical token - you have a phone.

What is the SimplySign application used for?

  • Signing documents exclusively in PDF format up to 20 MB
  • Mobile signature access (with internet connection requirement)
  • Collaboration with desktop applications (proCertum SmartSign, Adobe Acrobat)

What is the proCertum SmartSign program?

proCertum SmartSign is a desktop application (for Windows and macOS), also from Asseco/Certum, that allows signing and verifying electronic signatures. It supports the formats PAdES, XAdES i CAdES, adds timestamps, and checks other users' captions. You could say it's a versatile tool.

What is the proCertum SmartSign used for?

  • Signature files up to 50 MB (PDF, XML, DOC, etc.).
  • Select signature format and type (internal/external)
  • Verification of signatures, including with a qualified seal
  • Integration with SimplySign – for cloud signing

Do SimplySign and proCertum SmartSign have to work together?

They don't have to, but they often work together - and very effectively. Each application has its own use, but in duo they complement each other perfectly.

SimplySign without proCertum SmartSign?

Yes, but only to signings PDFs (up to 20 MB). The mobile app does not verify signatures.

proCertum SmartSign without SimplySign?

Yes, but only to verification signatures. It needs a connection to a certificate stored in the cloud to make a signature, and this is possible after using a token generated in the mobile app SimplySign....

Both at the same time?

 The perfect combination. proCertum SmartSign prepares the file and orders the signature, SimplySign mobile approves the operation from the phone.

 

Differences between SimplySign and proCertum SmartSign

SimplySign and proCertum SmartSign are two tools that can work independently, but together they form a powerful duo.

Want to sign PDF documents from your phone? All you need is SimplySign. Need to verify, sign other formats or support large files? Then be sure to add proCertum SmartSign.

If you have a SimplySign signature and want to take full advantage of it - download proCertum SmartSign and take advantage of their integration.

And if you do not know how to start - write to us on podpisano.pl. We'll help.

Qualified signatures SimplySign and Certum Mini

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