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I'm not sure if there is one or not, but here's a couple of forum discussions about it -
And a couple of decent looking apps -
Hope that helps
Are you wanting to use it like a dictaphone or is it something else?
The Play store is probably the best place to go (you can check out a few apps and see what suits you best).
I'd ask the other half to check his phone for it but he's at work just now