Acapella Maker - Video Collage

This is my first time using this app, it sucks. It's filled with bugs, if I stay on it long it closes on it's own. There is no option to listen to the 1st video while recording another which sucks, we should be able to listen to the 1st video while recording the 2nd one, and the 1st and 2nd while recording the third and so on. The option of listening to music while recording sucks to me because the sound of the music enters the Acapella, I am supposed to be able to listen without being a part

The app is great but I am unable to use it, the reason is that the previous version though not with this my hot 9 Android,, the previous version has an option for calibration and the option of listening to your first record while recording a second but now it is not available. I paid for a free version thinking all of the stated issue will be provided but it was just the same thing..

The previous version was better, it can play the audio of the first video, while you sing along with the next video record. which forms a better Acapella. Please if you can add back that feature, I will rate you 5 star. secondly the picked audio keeps playing after 1mins elaspe without stopping until I close the app. This app was super awesome the first year I downloaded it. please what's happening?, I'm not enjoying the current experience, please can there be an upgrade.