Welcome to the Community. I'd be glad to provide clarification on using QuickBooks with an IPad.
Just to clarify, are you using QuickBooks Online? If so, QuickBooks Online offers a free app for IPad that allows a user to manage business functions, such as invoicing customers or recording expenses. I'm including an article that contains additional information on this: Download and Install QuickBooks Online for IPad.
If you're using QuickBooks Desktop, the software isn't currently compatible with an IPad. However, you do have the option of transferring your information in QuickBooks Desktop to Online and using the app to access it. I'm including some resources that provide further insight on converting from QuickBooks Desktop to Online.