Would stylus pen have any use?

I am planning to buy a Lumia 1520 for my dad. He is not a technical enthusiastic like me, therefore typing using the onscreen keyboard is something that he always find hard.

Can someone suggest me a good stylus and an application, using which, anything that he writes, using the stylus, turns into digital? Something similar, that we have in Surface Pro 3 and Note 3?
 

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