For Professional Services, please check eSignaBox
https://www.esignabox.com/
https://play.google.com/store/apps/details?id=com.indenova.esigna.mobile.box
eSigna Writer Lite is Indenova's mobile application to sign
Sign documents, images, invoices, deals, rents, projects, work orders and send all of them to your contacts easily.
Check the authory of the signatures created using digital certificates thanks to the verifiying facilities of eSigna Writer Lite.
Save time signing documents from your mobile device without spending your data plan, because eSigna Writer Lite performs the signature in your device, without using your private data or creating aditional user accounts, easy and free, yes... GRATIS.
Features
Handwritten signature on PDF documents. Sign with stylus or finger (PDF display is in BETA)
Electronic signatures using smartcards* or software certificates. Use your DNIe, Spanish National ID to sign.
Signature and verification performed in the mobile device. The files are not sent to an external server
Electronic signature over one or more files and folders, using digital certificates
Verification of electronic signatures applied to files
Secure storage of digital certificates
Sign and verify files from your device file browser or third party applications (Dropbox, Googledrive, Skydrive, Evernote)
File and folder exploration using integrated file browser
Send e-mail through third party e-mail clients
Multi language support: Español, English, Français, Italiano, Portuês, Valencià, Català, German
Sign with several certificates using a single PIN
Support for local Certification Authority validation
OCSP validation for most of the supported Certificate Authorities
For suggestions and/or improvements write to soporte-android@indenova.com
*In case the certificate install process does not succeed, please, send us a signed e-mail (s/mime) or a file signed using PKCS#7 to soporte-android@indenova.com and we will check the certificate structure. Certificates are very heterogeneous.
*Smartcard is only available for Android 3.1 or above, using Spanish ID card. DNIe
eSigna Writer Lite uses SHA1_with_RSA signatures, PKCS#7 and PAdES basic signature formats.
专业服务，请检查eSignaBox
https://www.esignabox.com/
https://play.google.com/store/apps/details?id=com.indenova.esigna.mobile.box
eSigna作家精简版是Indenova的移动应用程序签名
 
注册文件，图片，发票，交易，租赁，项目，工作单和发送所有的人都到您的联系人轻松。
检查是否使用了感谢eSigna作家精简版的verifiying设施数字证书创建签名的authory。
保存在您的移动设备时签署的文件，无需花费你的数据计划，因为eSigna作家精简版在您的设备进行签名，而无需使用您的私人数据或创建aditional的用户帐户，轻松和自由，是...免费的。
 
特征
对PDF文档的手写签名。用手写笔或手指注册（PDF显示器处于BETA）
电子签名使用智能卡*或软件证书。用你的DNIe，西班牙国家ID登录。
签名和验证在移动设备中执行。文件不发送到外部服务器
在一个或多个文件和文件夹的电子签名，使用数字证书
电子签名的验证应用到文件
数字证书的安全存储
登录并从您的设备文件浏览器或第三方应用程序（的Dropbox，Google云端硬盘，SkyDrive中，Evernote的）验证文件
使用集成文件浏览文件和文件夹的探索
发送邮件通过第三方的电子邮件客户端
多语言支持：西班牙语，英语，法语，意大利语，Portuês，巴伦西亚，加泰罗尼亚语，德语
使用单个PIN多个证书登录
本地认证机构验证的支持
OCSP验证对于大多数支持的证书颁发机构
 
对于建议和/或改进写soporte-android@indenova.com
*如果将证书安装过程不成功，请给我们一个签名的电子邮件（S / MIME）或文件使用PKCS＃7 soporte-android@indenova.com签署，我们将检查证书的结构。证书是非常不同的。
 
*智能卡只适用于以上的Andr??oid 3.1，使用西班牙语的身份证。的DNIe
eSigna作家精简版采用SHA1_with_RSA签名，PKCS＃7和PAdES基本签名格式。

v1.5.2
Language detection & minor errors
Happy Sign :)