Find out what Apple ID was used to install an app
I've passed an iPad on to my boss and it seems I've left an app on there that keeps asking for my personal Apple ID for update purposes. Of course he's only come to me with this question when he's gone to do an update because there's 20 apps in the queue for update. So I don't know which app it is that is calling for my details so I can delete and reinstall using his ID.
Is there any way of determining what ID was used to install apps on a device? There are way too many apps now installed to delete and reinstall them all.
iPad, iOS 6.1.2