Much confusing – Add Music to Video Editor Review

Okay, this is supposed to be a free app, right? Am I missing something? I installed the app and tried to add some sound to a video, and it brought up the subscription page. If it’s a free app, then you shouldn’t have to buy it. It’s dishonest. If you can use this app for free the please tell me how. I can’t figure it out.
Review by Star Gazer51 on Add Music to Video Editor.