Amateur vs Pro: Advanced UI Design with Replit Design & Gemini 3 Pro

Try Replit Design mode today at https://replit.com/refer/chrisbgp 🚀 Join my community to build and launch real apps with AI @ https://www.skool.com/aiapps/about 🛠️ Work with me to make $5-50k+ with your app @ https://calendly.com/chris-ashby/appstudio 💡 Get 250+ validated app ideas and the prompts to build FREE @ https://readytobuild.app/ Gemini 3 Pro just dropped and it is incredibly good at UI design. So I put it to the test with Replit's new design mode that uses Gemini 3 Pro under the hood - to see just how good the UI design is vs standard AI design output. Long story short, the difference is crazy. And in this video I walk through how to use Replit's design mode, how to improve the UI design for your AI built app, and why Gemini 3 Pro might be the best AI model for design right now. Chapters: 01:00 - What Replit Design Mode is ​⁠ 02:35 - Why design-first workflow 04:10 - Set up: Build vs Design tabs 06:43 - First design pass (agent run) 07:13 - Compare: Default build vs design 09:05 - Design references + workflow 10:18 - Apply screenshot styling (prompt) 13:34 - Result: polished dashboard 14:52 - Tweak fonts, spacing, charts 15:20 - Bar chart update (select area) 17:05 - Color system unification 18:03 - Dark mode style reference 20:13 - Font direction: display + mono 22:22 - Result: typography upgrade 23:22 - Card styling: gradient strokes 25:17 - Graph polish: grid + axes 26:05 - Final UI showcase 26:41 - Takeaways: where Gemini 3 shines Key points: - I walk through Replit design mode and how it works - I create the same app from the same prompt using the regular build mode and design mode, and compare the 2 outputs on design quality - I use 2 different UI style references to see how well Replit design mode does at interpreting and changing the design for the app Follow me on social: https://www.linkedin.com/in/ashbychris/ https://x.com/chris_telescope