RethinkDNS comes with a companion Firewall app for Android, that lets you monitor and control Internet access to apps installed on your device.
The app lets you view searchable network log per connection; reveals apps that were blocked and when; Reveals apps that are connected to where and when.
It also lets you block individual IPs.
You would be able to set rules such as, block apps by category, block when app is in the background, block an app when device is locked, or block an app forever.
RethinkDNS Firewall when configured DNS, you can analyse DNS requests in real-time and read through aggregated reports in the App logs. And it also helps evade Internet censorship as enforced in most countries.
Goto rethinkDNS.com to download.