We've rebuilt the App Builder Engine from the ground up — delivering a smoother, more stable app-building experience with support for more complex applications, while reducing credit consumption to 30%–50% of previous levels.

What's New

• Interactive Q&A Flow: When requirements are unclear or additional environment variables are needed, the AI now asks key questions before generating.
• Manual Stop: You can now stop generation mid-process instead of waiting for it to finish.
• Smart Preview: The preview area supports auto warm-up, status feedback, and automatic retry on failure.
• Real-time Dev Logs: A new log panel shows runtime logs and error messages directly in the builder.
• Code Generation Awareness: Watch code being generated in real-time with streaming output.
• Model Selection: Choose between Pro and Max tiers for clearer capability levels.
• Binary File Preview: Images and other binary files now render correctly in the editor without corruption.
• Session Recovery: Refresh or re-enter the page and pick up right where you left off — generation progress and chat history are preserved.
• Environment Variables: Configure env vars for third-party integrations, significantly expanding the range of apps you can build.
• Self-Hosted Ready: No extra configuration or v0 service purchase needed — full end-to-end experience out of the box.

Experience Improvements

• Credit consumption reduced to 30%–50% of previous levels, effectively a 2–3x efficiency improvement.
• More granular preview loading states (warming up / generating / page loading) to reduce the feeling of being "stuck."
• Chat and preview sync is more stable — fewer blank screens, duplicate messages, and state mismatches.
• Smarter preview refresh with fewer unnecessary full-page reloads and flickers.
• Clearer error messages on publish failure for faster debugging.
• More reliable sync between app name, change description, and generated output.

Deprecations

• Retired the legacy v0 generation pipeline — all generation now uses the new App Builder Engine.
• Removed the old "page init retry" mechanism in favor of a unified generation and recovery flow.
• Removed legacy "pending app cards" and other transitional UI — merged into the new chat and task views.

What's Next

• Login authentication system with support for email, Google, Teable, and more sign-in methods.
• Support in-app AI features in App Builder.

Important Notes

• AI inside App Builder apps is not supported yet. So apps like invoice/receipt recognition, which rely on AI to read images, will currently fail. We're aware of this limitation and plan to improve it in future updates.
• The New App Builder is currently in Beta — there may be rough edges. If you encounter any issues, please share your feedback and we'll address them promptly: App Builder Feedback Form