Certificapp

Certificapp is the simplest and most secure way to use your digital certificate — without USB drives or computers. Everything happens on your device, within the Secure Enclave/Keystore, so your private key never leaves your phone or touches our servers.

Note: Certificapp is a private application and is not affiliated with, endorsed by, or authorized by any government agency.

What you can do:
Identify yourself to government agencies and private services with a recognized electronic signature.
Authorize online operations and transactions with full legal validity (eIDAS).
Sign PDF documents with a single tap: contracts, quotes, notifications, etc.
Send invoices to the Spanish Tax Agency (AEAT) using the Verifactu system, complying with the Spanish Anti-Fraud Law.
View your signature, invoice, and activity history in real time.
Receive secure notifications when a document requires your signature.

Top-level privacy and security: Your certificate and private key remain encrypted on your device; we cannot see them. Secure communication with TLS 1.3 and server pinning verification.
Access controlled by biometrics, PIN, or pattern, depending on your mobile device settings.
Periodic audits and penetration tests by independent third parties.

Full control of your data. Export or delete your history whenever you want.
Want to leave? Request the complete deletion of your account and data by writing to privacy@keblarsolutions.com, and we will carry it out in ≤ 30 days, retaining only what is required by law.

Why choose certificapp? Save time and avoid travel: sign wherever you are.
Comply with Spanish and European regulations without complex configurations.

Download certificapp today and take your digital certificate with you everywhere — secure, legal, and just a tap away.

Official sources of information
FNMT Certificates: https://www.sede.fnmt.gob.es/certificados/persona-fisica
AEAT Verifactu System: https://www2.agenciatributaria.gob.es/wlpl/AVAC-CALC/InformadorVerifactu
Anti-Fraud Law: https://www.boe.es/buscar/act.php?id=BOE-A-2021-11473