This is amazing app for save your internet data usage also secure downloads also protect android firewall without any root required.
you can control which app need internet connection. Display network speed graph in a status bar notification. Automatically identifies applications currently installed on your mobile device
This app is 50000+ downloaders with an average rating of 4.4 stars rated by 700 more peoples. It can download and install easily because its small size app. This app is offered by Sheikhsoft and released on 21st December 2017. The latest version of this app is 2.0 updated on 16th May 2018. This is the best application to save your internet data.
Features
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+ Android 5.1 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
+ Automatic launch of device startup
Simple to use
+ Android firewall protection with NO ROOT REQUIRED
+ No calling home
+ No tracking or analytics
+ Actively developed and supported
+ Material design theme with light and dark theme
+ 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 InternetGuard directly from the notification
+ Display network speed graph in a status bar notification
+ Select from five additional themes in both light and dark version