Helix Native is a VST plug in for your DAW and yes, it is essentially a software only version of your floor or rack unit. If you aren't using Sonar, Pro Tools, Reaper, or any sort of computer recording software then no, you don't need it. Even if you are doing recording, it's not a requirement. I use my Helix LT as an audio interface for my DAW and reamping is very easy with it because of its multi channel USB interface, so you have the same power without the latency of software plugins.