Re: Hi gvp159, I'm glad you reached out to the Community for...
Hi there, Jodee12.
All applications in the App Store were developed and released by third-party companies. They have their own billing and subscription mechanisms. They are listed in the App Store because they are compatible with QuickBooks.
Also, QuickBooks Self-Employed's subscription is separate from QuickBooks Online. You will be asked to create a different account if you will be using the mileage tracker from QBSE.