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[ARTICLE · art-42407] src=dev.to ↗ pub= topic=artificial-intelligence verified=true sentiment=↑ positive

I'm 11, I built a Math App with Gemini & Vercel, and I need your Mobile UX advice!

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.

read1 min views1 publishedJun 28, 2026

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/ 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/)

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