Neat! This is like a super-customizable version of this tool my company sues called Morale (https://moraleapp.com/).
Anonymity is key in these things or employees won't be able to answer truthfully. I can't tell if Vibe Catch is anonymous or not. Anyway, managers don't always know when something is wrong when they are dealing with multiple projects and a bunch of different employees. Trends over time are usually pretty interesting in these kinds of apps too.