Descriptions : NetGuard provides simple and advanced ways to block access to the Internet - no rooting required. Applications and addresses can be accessed via Wi-Fi and / or a mobile connection.
PROPERTIES:
+ Easy to use
+ No root required
+ 100% open source
+ Do not call home
+ No tracking or no analysis
+ No advertising
+ Active development and support
+ Android 5.1 and higher is supported
+ IPv4 / IPv6-TCP / UDP is supported
+ Tethering supported
+ Optionally allow when the screen is on
+ Optionally lock when roaming
+ Optionally block system applications
+ Material design theme with light and dark themes
Required Android Versions : Lollipop [5.0–5.0.2] - Marshmallow [6.0 - 6.0.1] - Nougat [7.0 – 7.1.1] - Oreo [8.0-8.1]