It can be managed through the app or via the website.
Test 1: EICAR in a text file hosted on a website
Secure Net successfully blocked this one and displayed me a message saying so. You also get a text message confirming this.
Test 2: EICAR in a zip file hosted on a website
Secure Net failed to block it this time. However a standard mobile antivirus was able to block it. The link it was coming from was from Kaspersky.
Test 3: A genuine trojan dated from 2010 contained in zip file hosted on a website
Secure Net failed to block this file.
I then uploaded it to VirusTotal to test it to see if most antiviruses would detect it - 47 of 59 got it. Surprisingly, a popular one - Symantec - did not detect anything wrong.
So overall, Secure Net is good at blocking EICAR, even over HTTPS. It's clearly scanning in real-time as well as the EICAR file was brand new on my site. However, it didn't detect the trojan, even though the majority of antiviruses did.
Secure Net isn't worth it, and is essentially a scam and complete waste of money. Having an actual mobile antivirus is more likely to protect you.