The first message to any AI app builder is the easy part. Describe an app, get a working version, and almost every tool on the market can do that reasonably well today. The real test is what happens on the second message, the third, the tenth, once the app is no longer a blank slate but a real thing you actually like and do not want to lose.
A plain chat window regenerates from scratch on every request, which means every follow-up is a gamble: ask for a small color change and there is a real chance the layout, the copy, or a feature you liked quietly changes too, because the model is writing the whole file again rather than editing it. People learn to dread the second message, which defeats the point of iterating at all.
Breezify's refine loop works differently. Every follow-up message is a targeted edit against the app's existing, real code, the same files you already have, not a fresh regeneration. Ask for a smaller button and you get a smaller button; everything else about the app stays exactly as it was, because nothing else was touched.
This is also why the model picker matters more once an app already exists. A refine only needs to reason about the specific change you asked for, so a cheaper, faster model is often enough even for an app that took a stronger model to build the first time. Save the expensive model for the hard first version and the genuinely hard follow-ups, and let a fast one handle the routine ones.
In practice, this is the difference between an app you slowly shape into what you actually wanted over twenty small messages, and an app you keep re-rolling from one big prompt, hoping this version keeps the parts you liked from the last one.