If the app does what it advertises, there is ZERO reason to care about how it was created. We aren't talking about a one shot prompt here. I'm sure they spent a lot of time working on it, regardless of how the code got generated.
I figure most people that comment this way actually have difficulty getting a coding agent actually on track and building something useful. Just because you lack that skill, doesn't mean others don't have it.
Regardless, a low effort comment by a human is worth a lot less than a comment from an AI with some thought behind it from a human.
I build from a lot of reference code I wrote myself. I've been coding for 40 (oh shit - I'm old and can't do math) years, so I have a LOT of code. The improvements to this code by the agents is staggering. That's my experience. Doesn't have to be yours.
Comments like great grandparent post will be somewhat like tailors tearing their hair out over everyone using factory manufactured clothing.
It might not be the same quality, it might not be a beautiful bespoke perfect structure, but it's good enough and it does the job.
Well done, op.