This is exactly the app I was looking for. A simple way to mix or layer two audio tracks rather than concatenate them. Unfortunately, while using the free trial, the app crashed multiple times during an hour long session. My files were 2+ hours in length and 200+MB in size.The UI is easy to use and focuses on layering tracks. The same process can be done with Audacity, but this is more streamlined. Obviously, the crashes make the app unreliable. I'd love to see these issues fixed.

trying to edit mt father daughter dance song for my wedding and it only let me play the song a certain amount of times before it wouldnt play anymore