The three steps above replay a real session in VibeSafe Builder: building a habit tracker from one sentence, asking for a login form, and rolling back when the security scan objects. The builds are pre-recorded so the demo needs no account, no API key and costs nothing, and so every visitor sees the same thing. The costs and scan results are taken from real builds of these same apps.
Every generation shows an estimate first, and you set a hard cap it will not cross. Most single-file apps run between $0.05 and $0.20. Failed generations are tracked separately, so a build that goes wrong never counts against your spend. Where your AI credits actually go breaks the numbers down.
Asking for a login form produces code with a hardcoded key in it, which is exactly how AI-built apps leak credentials in the wild. The scan catches it and refuses to publish. Launch Check goes further and opens the app in a real browser to catch errors a scan cannot see. See everything that gets checked.
Each change is a version with a diff, so an edit that breaks the app is one click from being undone. Nothing is lost when you roll back; later versions stay in the list. Why the AI gets stuck repeating a fix covers what happens when a change keeps failing.
Your first build is free — no card and no API key. If you have never built an app this way before, how to build your first app with AI is the place to start, and the pre-launch checklist covers what to check before you share it. The user guide explains the builder screen by screen, and pricing lays out both plans.