{"slug": "i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice", "title": "I'm 11, I built a Math App with Gemini & Vercel, and I need your Mobile UX advice!", "summary": "An 11-year-old developer built Jesse Math Rock Star, a math app using Google's Gemini models and Vercel, and is seeking mobile UX advice after finding that 61% of visitors use mobile phones. The app is live at jesse-math-rockstar-app.vercel.app.", "body_md": "Hello again, DEV Community!I recently shared my project, Jesse Math Rock Star, and the feedback from this community has been incredibly supportive.For those who don't know me, I am 11 years old. I started coding with Scratch when I was 8, and I built this production web app using self-explored vibe coding, Google's Gemini models (via AI Studio), and Vercel!Looking at my analytics, 61% of my visitors are using mobile phones, mostly Android. I want to make sure the app feels perfect and fun for kids my age to use on small touchscreens.Could you do me a quick favour?Open the app on your phone: [https://jesse-math-rockstar-app.vercel.app/](https://jesse-math-rockstar-app.vercel.app/) a quick round of math.Leave a comment below with your advice on the user interface (UI) and layout!Thank you all for being such a safe and helpful community for early-career builders! ([https://jesse-math-rockstar-app.vercel.app/](https://jesse-math-rockstar-app.vercel.app/))", "url": "https://wpnews.pro/news/i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice", "canonical_source": "https://dev.to/jesse_otobo_/im-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice-21bh", "published_at": "2026-06-28 09:56:56+00:00", "updated_at": "2026-06-28 10:03:53.388280+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products", "developer-tools"], "entities": ["Google", "Gemini", "Vercel", "Jesse Math Rock Star"], "alternates": {"html": "https://wpnews.pro/news/i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice", "markdown": "https://wpnews.pro/news/i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice.md", "text": "https://wpnews.pro/news/i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice.txt", "jsonld": "https://wpnews.pro/news/i-m-11-i-built-a-math-app-with-gemini-vercel-and-i-need-your-mobile-ux-advice.jsonld"}}