NxFilter is a great way to make the internet safer for your kids. Luckily, it’s free for home use as long as you don’t need to monitor more than 20 users or devices. It works by filtering DNS requests to each client. No matter what kind of device they are using (a computer or a phone), as long as they are connected to your WiFi you can control what they can access. It’s also a good way to monitor their online habits and see which websites they are visiting. If your not familiar with NxFilter, you can read more about it here.