NetGuard

NetGuard is possibly the first free and open source no root firewall for Android.

Features

No root required
Simple to use
Free and open source
No extra battery usage
No calling home
No tracking (analytics)
No ads

NetGuard doesn't even require internet permission.

Usage

Enable the firewall using the switch in the action bar
Allow/deny Wi-FI/mobile internet access using the icons at the right side of the application list

Permissions

ACCESS_NETWORK_STATE: to check if the device is connected to the internet through Wi-Fi
RECEIVE_BOOT_COMPLETED: to start the firewall when starting the device

Frequently asked questions

(1) Can NetGuard protect my privacy?

Not really, since the firewall cannot be started right after starting your device and because updating firewall rules require momentarily turning off the firewall.

(2) Can I use VPN applications while using NetGuard?

If the VPN application is using the VPN service, then no, because NetGuard needs to use this service too and Android allows this to just one application at a time.

(3) Can I use NetGuard on any Android version?

No, because the method addDisallowedApplication is being used the minimum required Android version is 5.0 (Lollipop).

(4) Will NetGuard use extra battery power?

No, unlike most of the similar closed source alternatives.

Support

Questions: please use this forum
Feature requests and bugs: please report an issue

Please do not use GitHub for questions.

Contributing

Translations:

Translations to other languages are welcomed
Check if the language is supported by Android and find its locale
Copy this file to the correct locale folder
Translate the strings in the copied file and omit all lines with translatable="false"
Create a pull request for the new/updated translation

Please note that you agree to the license below by contributing, including the copyright.

License

GNU General Public License version 3

This file is part of NetGuard.

NetGuard is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your discretion) any later version.

NetGuard is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with NetGuard. If not, see http://www.gnu.org/licenses/.

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