NetGuard - no-root firewall play online

NetGuard is an internet security app, which offers simple and advanced ways to restrict apps' access to the internet.

Applications and addresses can individually be allowed or denied access to your Wi-Fi and/or mobile connection. Root permissions are not required.

Blocking access to the internet can help:

reduce your data usage
save your battery
increase your privacy

Features:

Simple to use
No root required
100% open source
No calling home
No tracking or analytics
No advertisements
Actively developed and supported
Android 5.1 and later supported
IPv4/IPv6 TCP/UDP supported
Tethering supported
Optionally allow when screen on
Optionally block when roaming
Optionally block system applications
Optionally notify when an application accesses the internet
Optionally record network usage per application per address
Material design theme with light and dark theme

PRO features:

Log all outgoing traffic; search and filter access attempts; export PCAP files to analyze traffic
Allow/block individual addresses per application
New application notifications; configure NetGuard directly from the notification
Display network speed graph in a status bar notification
Select from five additional themes in both light and dark version

There is no other no-root firewall offering all these features.

If you like to test new features, you can participate in the test program: https://play.google.com/apps/testing/eu.faircode.netguard

All required permissions are described here: https://github.com/M66B/NetGuard/blob/master/FAQ.md#user-content-faq42

NetGuard uses the Android VPNService to route traffic to itself, so it can be filtered on-device instead of on a server. Only one app can use this service at the same time, which is a limitation of Android.

The full source code is available here: https://github.com/M66B/NetGuard