This is a discussion on iPad 2 - iPad Mini within the iPad Mini Forum forums, part of the Apple iPad Discussions category; Originally Posted by Gabriel1
Are both iPads linked to your Apple ID?
Yes,I was advised to keep my Apple ID...
In that case all I can think of is that the app was originally free but has become a paid app since you purchased it originally. It may be worth checking the purchased tab in the App Store on your iPad Mini.