Current studies and surveys strongly say no. Sorry, you hitched a ride on the bandwagon but it's unlikely that there was any return on your (probably quite large) investment.
I have so many apps on my phone. They range from restaurant finders to a handy spirit level. Do I have any apps from specific businesses? No, I don't. What good would they be to me?
"Ah" you say "if you had my company app, you'd be able to find out about our special deals and offers". Well, I can find out about those from Foursquare (free to you), Gowalla (free to you ), Yelp (free to you), your Facebook page (free to you), your LinkedIn group (free to you) ...
"But" you reply "it has all sorts of useful information about us". Like what? An interactive map to your location? What else?
Those recent studies I mentioned revealed that phone apps just don't work as far as marketing is concerned. They are an indugence - and a rather expensive one.
Your phone-enabled website however, is another matter. Of course your website needs to work well on a phone. And it will have an interactive map, details about your business, the ability for viewers to order, your special offers...
So do you need a phone app, really, truly, honestly? Or has someone just persuaded you that you do "need" one because "it's the latest thing". Well, you're not going to be fooled by that one either because phone apps have been around for many years - you'll hardly be a forerunner.
Do you want to spend a lot of money on developing a phone app that, according to studies and surveys won't bring you any business?
I thought not. Do not be fooled.