NetGuard – no-root firewall 
NetGuard provides simple and advanced ways to block access to the internet – no root required. 
Applications and addresses can individually be allowed or denied access to your Wi-Fi and/or mobile connection. 
Blocking access to the internet can help: 
>reduce your data usage 
>save your battery 
>increase your privacy 
Key Features 
>Simple to use 
>No root required 
>100% open source 
>No calling home 
>No tracking or analytics 
>No advertisements 
>Android 4.0 and later supported 
>IPv4/IPv6 TCP/UDP supported 
>Tethering supported 
>Multiple device users 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. 
How to install? 
>Save the downloaded .apk on your android phone’s SD card 
>Run and install it 
>That’s it,Enjoy!