Publishing public app with public+confidential data

[cameraville]

Hello I can’t find the info I am looking for in the documentation or don’t understand it correctly.

Is it possible to delpoy a public app to the app store with the ability for user confidential information without paying $10 for every user?

The average price for an app is under $5, am I supposed to charge $15 for an app download just so I can make $5?

Thank you.