Or you could be adults and talk to each other. Telling a friend you want to cancel is usually hard because you haven't practiced setting boundaries.

This app doesn't help. It just postpones the problem until you meet somebody who doesn't need the app, except now you're even further behind in practicing that skill.

I get the desire to automate interactions. I really do. I have days where I really would rather not see people at all. But it doesn't work. In the very best case, if it works as designed, it deprives you further of human interactions, making it even harder outside of the app context to interact.