Why do I need to log in to Facebook to use Jumbo?
When you log in your Facebook account, you're typing your password directly into Facebook's login page – Jumbo doesn't see or store passwords. As a privacy rule, we don't store any of our user's information. We don't even have servers, everything Jumbo app does happen locally on your phone.
Uninstalling the Jumbo app from your phone will remove Jumbo's access to your Facebook's privacy settings