Your digital signature.
Always with you.
Access Spanish public services and sign compatible operations from your Android device, using your own digital certificate.
Android 8.0 or later · Experimental project
A more direct route.
From your phone.
A browser, your certificate and the services you need. Explore the three steps.
INTERACTIVE GUIDE · STEP 01
Start with your task.
Browse the catalogue without importing a certificate. Select your region manually or use optional location detection.
No certificate needed to browseINTERACTIVE GUIDE · STEP 02
Your identity, under your control.
When a service requires it, select your digital certificate and enter its password in the app. Firma Mobile does not issue certificates.
Private keys and passwords are handled locallyINTERACTIVE GUIDE · STEP 03
You have the final say.
On compatible portals and operations, review what you are signing and confirm. Then check the receipt issued by the portal itself.
A local signature does not guarantee portal acceptanceCompatibility is verified per portal and operation. Read compatibility evidence ↗
Your certificate.
On your device.
The import and signing workflow does not upload your certificate file, private key or password to a project server.
Read the privacy policyLocal certificate handling
Unlocking may be retained in an encrypted local cache for up to 24 hours. End it earlier with the certificate-lock option.
Approval before signing
Each signature requires your confirmation. Authentication and signing permissions depend on specific portal profiles.
Clarity about your data
The portal may receive your public certificate, signature and the data needed for that operation. Each service applies its own privacy policy.
Locking the certificate does not revoke it with its issuer and may not end existing portal sessions. Also use the service’s own sign-out option when appropriate.
From GitHub
to your Android.
The published version is available as an APK in the project repository. Review its notes and requirements before installing.
- 01
Download the project APK
Open the GitHub release. It contains the APK, release notes and verification files.
- 02
Install on your device
Open the downloaded APK and follow Android’s instructions. If you enable installation from that source, limit the permission to this installation.
- 03
Open Firma Mobile
Explore the catalogue and select your region. Add your .p12 or .pfx certificate when you need to authenticate or sign.
Already installed? Update while keeping your data. If Android reports a signing-key mismatch, stop and verify where the APK came from.
A project you can inspect.
Firma Mobile is an independent, open-source app. Its development, documentation and compatibility evidence are published on GitHub.
Source under Apache-2.0 · Third-party components retain their own licences.
Questions,
answered.
Is this the official AutoFirma app?
No. Firma Mobile is an independent project. It does not belong to Junta de Andalucía or any other public administration and does not imply their sponsorship, certification or endorsement.
Does it work with every portal?
There is no universal guarantee. The project is experimental and compatibility is documented per portal and operation. A service appearing in the catalogue does not mean that all its functions are supported.
Do I need a digital certificate?
You can explore the catalogue without one. For operations that require authentication or signing, you need a compatible .p12 or .pfx certificate and its password. The app does not issue certificates.
Where are my documents stored?
Files downloaded or saved through Android remain in the location you choose. Portals may retain documents you submit under their own policies.
How can I report a problem?
Use GitHub issues for general questions. They are public: do not attach certificates, passwords, private documents or authenticated screenshots. For vulnerabilities, read the security policy first.
Take your paperwork with you.
Download the published version and check compatibility for the service you need.