How to enter signature on mobile device

I had this question after viewing Issues with signature.

28977073 was a question need to capture the signature as well as using js on a mobile device.
The answer does not permit entering a signature on an iPhone nor an Ipad
Steve HarrisAsked:
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Eoin OSullivanConsultantCommented:

There's nothing inherently wrong with the Javascript/PHP.

Personally I've developed a HTML5 app which works on iOS and Android and used the following Signature Pad which is probably similar to the one you're using.

What I did find however is that the rendering engine in Safari on iOS is a little different from Safari on OSX and other browsers like Chrome. On iOS while I could see the signature area, i couldn't write in it .. it turned out to be a CSS issue rather than HTML5 or JS.  I had to set the height/width of the signature input box element slightly differently from the default to get it to work on Safari on iOS but the Javascript code was fine.
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
I have used something similar but it is more current  I don't remember issues on iOS devices.

You have some options for saving the data.  I ended up encrypting the base64 data and added that to a text field in my database.
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