Firewall iP7 cydia tweak allows you to block outgoing connections (TCP, UDP & SCTP).
And by doing that an app can’t send out or receive data if the connection is blocked. It hooks into applications and will warn you if the app wants to establish a connection to a host and shows you the hostname. Then you have the options to allow or deny the connection once/always or allow/deny all connections for the application. Port specific blocking is possible.
You can decide if the application will send data. Developers will no longer be able to collect stats and data about you (UDID, phone number, usage statistics…). With Firewall iP7 you can cover all app analytic providers which aren’t in PrivaCy and also custom analytics.