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App to capture signatures on Android Tablet and Phone


Software available in different versions

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aSignatureSuite is the Android client of our web service solution "webSignatureOffice" Product Range and allows you to fill out and sign read-only PDF/A documents online and offline from mobile Android tablets and Android phones. The free signature app accesses the webSignatureOffice server and can, therefore, be integrated into any web-based solution. When signing on the Android tablet and Android phone, your electronic signature is captured by the free signature app, aSignatureSuite. This process not only stores the signature image but also the biometric data in the best possible quality (time history). * An account with a webSignatureOffice server is required to use aSignatureSuite.

Learn more:
Online signing with the webSignatureOffice online signature server

*The maximum temporal and local resolution are set by the Android tablet hardware; further information and measurement values are available on request.




Document selection and document view

The start screen shows all the loaded documents and their statuses (signed, partially signed, unsigned, etc.), their expiration dates and much more. You can also sort the view by various criteria and select a document for editing.

In view mode, you can zoom into and flick through the document with the tablet in the usual manner.


Filling out documents

Any entry fields in the document can be completed on the Android device before starting the signing process. As well as filling out text-only fields, you can also fill marking fields (such as checkboxes, radio buttons) - for example, to agree to terms and conditions. It is also possible to use drop-down menus.


Signing documents

Signing on the Android tablet can be initiated by manual selection of the signature field or by starting a pre-defined, fully automated signature process; this ensures no signatures are forgotten and eliminates manual entry. The biometric data is safely encrypted and linked with the document. For protection, each signature is protected on the server by a digital certificate. By using ISO-compliant signatures, the document can later be checked for changes and manipulation by any recipient (e.g. by using Adobe Reader).


The process of automatically generating a signature can be defined for each document with webSignatureOffice via the server and is guided by either keyword in the PDF or by PDF signature fields (if the loaded document already contains these). This method ensures that even documents where the position and number of the signatures varies can be processed fully automatically. A third option is to state the pre-defined position details (page and X/Y position). It is, of course, also possible with aSignatureSuite to add a signature field in the document entirely manually and to alter the size and position before it is signed by yourself or a business partner.


The server and connection to customer systems

Documents are exchanged and controlled via an encrypted (SSL) webSignatureOffice server, which has a web interface that allows easy management of documents, signature sequences, and users. Business customers can also choose to run the server themselves and then activate and control it via the interfaces (web services) from the customer's system.



Offline capability

After the aSignatureSuite app is synchronized with the webSignatureOffice server, it can also be used to edit the loaded documents and capture signatures offline. The documents are automatically synchronized with the server as soon as the Android Tablet or Android Phone with aSignatureSuite is back online.


Integrating the app

As a native Android app, aSignatureSuite uses its full ergonomics with gesture control and trusted operating features, as well as utilizing the speed of the Android tablet to its best advantage. A later edition of aSignatureSuite will also enable business customers to integrate aSignatureSuite into their own apps as a component.

Signing with tablets made simple and secure thanks to aSignatureSuite from StepOver.


Secure signature

The biometric data of the signature is already encrypted safely in the Android Tablet and linked to the document in such a way as to prevent misuse in another document. A public RSA key (4096 bit), or similar, is used, so that the biometric data cannot be decrypted without access to the private RSA key assigned. This is stored safely with a notary who has produced the pair of keys. It is this procedure alone which allows the operator of the solution to demonstrate, should there be doubts, that they could not decrypt the biometric data and consequently they could not misuse this to sign other or altered documents.

In addition, every signature on the server is again provided with a digital signature, so that each recipient can check the integrity of the document, for example by using Adobe Reader.


Main functions

This product is a stand-alone, free signature app and does not require any additional third-party software (such as Adobe Acrobat). However, this signature capturing app is also available to integrators as a component for their own apps.

Users must have a paid account with a webSignatureSuite server in order to run aSignatureSuite.

Learn more:




    • PDF/A documents created by the customer (via webSignatureOffice server)
    • It is also possible for the above PDF documents to have customer-defined signature fields (as well as customer-created form fields)


    • When the source document is PDF/A compliant, the document remains PDF/A compliant even after signing
    • ISO-compliant PDF signatures can be checked using all standard products (e.g. Adobe Reader) and enables interoperability with other signature processes and programs that conform to the standards
    • Capture a handwritten electronic signature using an Android tablet



    • Sign directly in the document (no separate signature window)
    • Preview of the selected PDFs
    • Allows browsing, zooming and continuous scrolling of PDF documents
    • Filling of PDF form fields and supports checkboxes, radio buttons, and drop-down menus
    • Clear document management with status tracking and automatic reminders for all signers

Ability to customize/integrate

    • Can also be fully integrated into customer's apps as a component*
      *In a later edition



    • Template management (saving documents for re-use, including signature templates)
    • Intelligent signature templates (e.g. automated positioning of signature fields, even for dynamic documents, e.g. using keywords)
    • Jumps automatically to the signature fields during the signing process and zooms in if necessary
    • Handles compulsory and optional signature fields differently (stop at compulsory field = stop the whole signing process)



    • Supports encryption on the tablet using biometric data with 4096 bit RSA
    • Delayed signing is possible at any time without compromising safety
    • Form fields automatically locked once signed
    • Signatures provided can easily be checked (using Adobe Acrobat Reader)
    • Secure communication over https

Software versions

for android tablets

SOI order no.: 130060992

for android smartphones

SOI order no.: 130060992

System prerequisites

Hardware prerequisites

Smartphones and tablets with the Android system

Operating system

Android 4.0 and higher versions

Information material

Information about StepOver signature software:

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