A free app for Android, by Parity Zone.

Digital Signature – E Sign is a handy utility that is used to create a unique signature that can be used on a wide variety of digital documents. It is a very important tool that is needed in order to have an authentic document. This utility has a simple user interface that is easy to use. It is an online application, so you will need to have an internet connection in order to use it. 

You can use this tool in a very easy way. The first thing you need to do is to choose the document that you want to sign. You will need to select the name of the document and then tap on the button that is on the top right of the screen. You will be given a screen that will show you a signature that you can use on the document. You can select any signature that you want to use on the document.