College student × indie developer / Haruhiro Ono
YO-KO
Too much research. Numbers that don't add up. Habits that never stick.
I kill each one — with a small web app.
Engineering student at Chitose Institute of Science and Technology, Japan. 37 web apps in 3 months, built with Claude Code. Every project shown here includes who it's for, what problem it kills, and what friction it removes.
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web apps
3 months
build time
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categories
START HERE
37 APPS — WHAT EACH ONE REMOVES
TECH STACK
WHAT I BUILD FOR CLIENTS
Web Apps & Diagnostic Tools
Tired-of-researching users get an answer instead of more options. Diagnostic tools, comparison engines, and affiliate-optimized apps — from design to deploy in 2–3 days.
AI Integration & Automation
Replace repetitive manual work with Claude or Gemini API. Content generation, GAS automation, chatbot embedding — anything that currently takes a human 30 minutes and shouldn't.
LP & Corporate Sites
Sites that generate inquiries rather than sit there. SEO-structured, Core Web Vitals optimized, and implemented from Figma or a brief. Shipped in 3–5 days.
Let's build together.
LP builds · GAS automation · Diagnostic web apps · AI-integrated tools
Shipped in 3–5 days. DM on X or send an email.