Comment by onion2k

You don't need an app like this.

Just decline any meeting that doesn't have an agenda with a comment of "I don't think I'd bring any value to this meeting."

If the meeting does have an agenda but doesn't have any goal decline it with a comment like "I don't have a strong opinion about the goal here, so I'm happy to accept whatever the outcome is."

If there's an agenda and a goal then attend that one because you don't often get to see a mythical creature.