Looking for a contact/form merge app

[Beards247]

Trying to help a non-techie friend find a solution.

At his desk he can use Excel/Word to mail merge into email/pdf/etc. He wants to be able to do the same thing on the road, from his Android phone.

So he needs a basic contact manager, populating into a letter. Once it is in letter form he can do whatever he wants.

Any leads on apps to look at or other solutions?

Thanks in advance,

Chris