I heard about this from a friend because I wanted to be able to enter my budget and other constraints somewhere, and then let a computer generate all sorts of options for the weekend. These guys are doing exactly that!
I don't tend to install one-off apps anymore, and I'm biased towards web, but I think this would function better as a web app. I do little of my holiday searching on mobile.
The app itself is okay, but buggy. In just 10 minutes of use, I had several instances of infinite loading, had to close and reopen the app because it stopped working, and just a black screen on 'saved items' (iPhone 7 11.2.6).
I'm sure these sorts of niggles will be addressed as the app matures, and the concept itself is very cool. However, I couldn't really recommend it in its current state.