I hate apps like this! Keep looking!

You would think by the name of the app “Sign Master—Easy PDF Assistant” and the fact that it was free would mean that you could use the app to actually sign a document. But no, you have to pay for the app in order to actually use the product. And of course they don’t tell you that when you look at it in the app store. I don’t mind paying for an app, but I want to at least test it first. The user interface is not good. There would be no way I would pay 9.99 for this app.

The HGB about Sign Master - Document Signer, v1.2