Actually a lot of high ups like CEOs and senior staff email excel spreadsheets around. You'd be surprised.. I can think of about 3 or 4 examples of these types that I've come across off the top of my head.

Do you have anything we could look at? =) I think if you have the right approach and decent marketing you definitely have a market..

but the description you have is a little vague so it's hard to figure out what makes your app interesting and therefore hard to advise..