FTP Access not working

I am not a novice, but trying out this service. Cannot get into FTP hosting (with or without PASV). Since it is Port 21, I assume it is NOT SFTP.

It is my only site at https://3circles.000webhostapp.com/

Seems fine here not sure why you have that issue.

Try rebooting home router or using a VPN

No, it doesn’t work. I can use your file manager fine, but I cannot connect using Transmit (OS X program).

I am trying this out to see if I want to use the paid service, but running into some issues…

Try using VPN or proxy, I’ve tried over FileZilla and it is working fine.

The free service is nothing like the paid service at all so no point using 000webhost as a comparison unfortunately.