How do I log out of the QB phone app?

Hi there, @robert-keats. 

You can go to the QuickBooks menu, then click Sign Out. If that menu item isn’t available or doesn’t work, go to the Help menu and select Reset App Data.

See this link for information on which mobile app features on QuickBooks Online are supported on mobile apps: Compare mobile app features.

Let me know if you still have other questions. I'll be sure to get back to you as soon as I can.