Import RSS feed into my WordPress Blog as Posts

I know this is possible because I know another company using it, but I cannot figure it out.

I have an RSS feed that is updated constantly from one of my websites. I want to take that data and have it imported into my WordPress blog. I know I can Import and RSS feed but it makes me pull in a file. Isn’t there a way to do this automatically, maybe once an hour or something?

Thanks!