Black Box for Android.

On-device network protection that helps you decide which apps reach the network. Built on Android's local VPN system. Designed to keep protection data on the phone.

How it works

Black Box uses Android's local VPN system to apply your protection rules on the device. When Lockdown Mode is on, selected apps are blocked from reaching the network. Black Box records the per-app decisions locally so you can review them later.

Before Android shows the system VPN permission prompt, Black Box displays a clear Local VPN protection explanation so you know what the local VPN does and what data is handled.

Features

Local VPN protection

Uses Android's local VPN system. Protection runs on your device. Your network traffic is not sent to Black Box servers, and page contents are not read.

Lockdown Mode

Helps block selected apps from reaching the network. You can turn Lockdown Mode off at any time from the Dashboard.

Protection Activity

A simple per-app view of what was blocked during the last 24 hours, with a calm summary card and a detailed list grouped by app.

Privacy Timeline

Recent privacy-related events from your apps, shown in plain English with friendly source labels.

Daily Protection summary

Optional daily notification recapping the last 24 hours of protection activity. Off by default; you decide whether to turn it on.

Designed to keep data on the device

Protection records are stored in app-private storage on your phone. You can export or delete them at any time from the Privacy screen.

What Black Box does not do

Does not send your network traffic to Black Box servers.
Does not read the contents of your messages, calls, photos, or web pages.
Does not show ads.
Does not require a login or account in the current test build.
Does not guarantee perfect protection — protection depends on Android system permissions, device settings, and manufacturer behaviour.

Permissions used

Black Box requests the local VPN permission so it can apply Lockdown Mode and record Protection Activity on the device. It also uses standard Android permissions for notifications and for restarting background work after a reboot. Each permission is described inside the app before it is requested.