I downloaded this in preparation to record two songs which a visiting folk music teacher was coming to teach without sheetmusic. The moment came, and I found the buttons in the app actually don’t do anything. Or if they do, it was not readily apparent. I scrambled to find a workaround, and ended up just recording with my phone camera. Planet Choir is worse than useless. (If I simply am missing something, feel free to correct me; but in any case, an app like this had better be very straightforward and intuitive. But as far as I can tell, it’s just a useless scam.)