Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
Droid Insight 360 - Droid Insight 360 is an integrated and a powerful suite with five essential apps built into one.
NetGuard - NetGuard
Glextor AppManager - Glextor AppManager - application organizer, manager, launcher for Android.
Portmaster - Is a Privacy Modular Privacy App which includes a "DNS over TLS" feature as well as an "Application Firewall".
Comptel Interconnect Billing - Billing and Invoicing