But this is what I found in their website.. Intra encrypts your internet connection to a public Domain Name System (DNS) server. DNS servers work like a contact list — when you use the internet, your DNS server provides the exact addresses you need to visit a website or open an app.
However, DNS servers can be altered to block access or redirect you to fake websites. By encrypting your connection to DNS servers on your Android device, Intra helps ensure that the results can’t be manipulated, so you can safely access the internet.
I don't think you need to use it if you already have a stable internet connection. In my case, a ping of 200ms is made 1ms when the app is on. Sometimes it still doesn't help when the ping is really too high.. I just disable it and compare which is better.
