I see the essence of privacy mode button, CornwallOvenCleaning.
As of now, you can use the Privacy mode function in QuickBooks Online via browser only. I will submit feedback to our product developers so they can assess this for future updates.
You can check this link for the Frequently Added Questions for QBO Mobile app: http://http-download.intuit.com/http.intuit/CMO/QBM/android/qbo/v3_1/en_US/android_phone_qbo_faq.htm....
Count me in if you have questions in mind. I'm here ready to help. Have a good one.