InternetGuard for Android Devices
InternetGuard is a personal firewall for Android devices. It allows you to control which apps and domains have access to your Wi-Fi and/or mobile data.
To block access to a particular website or a particular app, just add its domain name to the list of blacklisted domains. You can also add a list of trusted apps and domains. To allow access to a website or an app, you need to add its IP address to the list of allowed domains or trusted apps.
The default settings will work most of the time, but you can change the settings to make InternetGuard work even when you're not connected to the Internet.