Sign with Digital Certificate

Contains adsIn-app purchases
4.4
837 reviews
Content rating
Everyone
10K+
Downloads
Content rating
Everyone
Learn more
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About this app

Sign with Electronic signature, Digital Signature or esignature:
Download the Sign with Digital Certificate App to effortlessly sign PDFs and Word documents.

How to create a certificate
It's straightforward and rapid. Simply launch the app, choose 'sign with certificate', and immediately apply your personal identification to your document.

How to sign a pdf
First, ensure your certificate is installed on your Android device. After that, the app handles everything. Just select your certificate and affix your own identification.

Add your personal identidication to a pdf
Choose your preferred signing method: by hand, combining hand and digital certificate, or exclusively using the signature for your PDF document.

Electronic Signature application:
Experience the future of signing with your device. Seamlessly sign documents on your device, ensuring both speed and security.

Digital Signature Creator:
Craft authentic signatures with ease. Our application provides an intuitive interface to generate and apply yor certificate and signatures that are both legally binding and professional.

Create Digital Signature:
No more manual processes or lengthy waits. With just a few taps, generate your unique identification and apply it to any document.

Electronic Signature in Word:
Embedding personal identification in Word Documents (.doc or .docx) has never been easier. Our certifica seamlessly integrates with Word documents, allowing swift signing without any complications.

What is an certificate in am electronic signature?
Beyond just a digital representation of your personal identification, it's a promise of authenticity. With your certificate, you're not just signing; you're assuring trustworthiness.

Signing:
Embrace the digital revolution! Move away from paper and pen, and step into the realm of secure, fast, and efficient digital signing with your personal certificate.

What is a Digital Signature?
It's more than just an online scribble. It ensures the integrity and authenticity of a document. Dive deep into the world of trust and security with our app, your guide to understanding and implementing your signs in documents.
Updated on
Feb 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.4
836 reviews
vishnu singh
February 24, 2026
More options for customizing the signature text may be added. Like, 1. Time of signing 2. Image in sign background. 2. Manual formatting for date and time instead prefixed format options Edit: After digitally signed with certificate, file rename option should be there or same name of pdf may be retained so that pdf can be shared directly from this app after download or during share.
Did you find this helpful?
FirmaDNI.com - MultiApps SL
February 24, 2026
Thank you for the 5 stars! I just uploaded a new version with several improvements, and I’ve noted your suggestions for the next update. Thank you for the advice — I’ll make a note of it to review.
Ondřej Válek
December 6, 2025
Since version 2000020 signing a document already containg another signature works fine, validation in Adobe Reader passes. The ad on the main screen is pretty high (even after minimizing it), so that the last option "Scribble only" is barely visible and is not possible to scroll there.
1 person found this review helpful
Did you find this helpful?
FirmaDNI.com - MultiApps SL
December 6, 2025
Hi, in the latest version the issue that invalidated older signatures was fixed. I’d appreciate it if you could confirm it for me. Thanks.
Blaz R
August 14, 2024
Works great for signing PDFs with a digital certificate. Why doesn't Adobe implement this?
1 person found this review helpful
Did you find this helpful?
FirmaDNI.com - MultiApps SL
August 14, 2024
Hello, I'm not sure if Adobe does it or not, but what I'm sure of is that if they do, it involves a subscription fee, as usual! Thanks for your comment and rating.

What’s new

🔧 Stability and performance improvements:
- Fixed crashes when opening PDFs from WhatsApp and other apps
- Fixed crash with ECDSA certificates during signing
- Improved image-to-PDF conversion reliability
- Fixed app freezing (ANR) when opening large PDF files
- Better handling of corrupted or password-protected PDFs
- General bug fixes and stability improvements
Content rating
Everyone
Learn more

App support

About the developer
MULTIAPPS SL
playstore@firmadni.com
AVENIDA AEROPORTO, 686 - BJ 36318 VIGO Spain
+34 600 64 12 78

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