What Is This?

A friend of mine just mailed me this. What is she talking about? I have hunted on the App Store and come up with nothing. Thank you for any guidance.

I'm not sure you can tether, but I know that Maggie can create a hotspot with her iTouch. Meaning, she presses a button and it creates a wifi network that anyone can get onto. She loves it, and so does her friends.​

I know that you can detect wi-fi in an area, but make your iPod Touch into a hot spot? It's not Mi-Fi, I don't think...is it?