It is. It's the app. You pick a song, put the ear buds in, and hit record. He can adjust the level with a slider between the vocal and the backing track. And while you are recording it really sounds fantastic. There is a thing when I am in the studio or home studio and recording vocals. If you give it compression and reverb it just sounds lush. That sound gives you that extra mojo boost of "I'm killin' this!" That can put your performance over the top.
This app does that!
I'm so impressed with it that I've been googling the app developer. I'd like to get it for myself. Meaning a separate app that utilizes the exact same programming. I want to do all my performing, recording, and editing of my song at home. Then email the track without the lead vocal to myself, open it with the app on my phone, and record the lead vocal in the same way.
youtube.com/neanderpaul