Hello @clari,
QuickBooks Desktop is designed to work with personal and desktop computers. As mentioned by our Community Champion, @john-pero, installing it in your iPad Pro is unavailable. You'll want to work with QuickBooks Online and install the app directly from the App Store.
Lastly, here's an article you can read for ideas about the product which will work best for you: QuickBooks Products Comparison.
If there's anything else that I can help you with, please let me know in the comments. I'll be happy to help.
