Purchasing the Pro version through the Google Play Store or GitHub unlocks several professional-grade capabilities:

M66B/NetGuard: A simple way to block access to the ... - GitHub

: Fully supports IPv4/IPv6 and both TCP and UDP protocols.

: Export capture files for advanced traffic analysis in tools like Wireshark.

: Receive notifications for new applications and configure their firewall rules directly from the notification shade. Performance & Privacy

: Manage internet access even when using your device as a hotspot. Advanced Pro Features

: There is no tracking, no analytics, and the app does not "call home" to its developers.

: Individually allow or block internet access for any installed or system application.