Small tools that actually fix the little things.

I'm kernelian, a solo developer in Japan. I take the little “I wish this existed” moments — around AI, games, and movies — and turn them into apps you'll actually use.

See the work Follow on X

Works

The apps I'm building right now.

AI tool In development / beta

Andon; AI Limit Watcher

Watches your Claude / ChatGPT / GitHub Copilot rate limits and warns you in time — a menu-bar app so you never hit the wall unaware.

macOS menu-bar app (Windows planned)

About

デスクで開発する kernelian と、足元でカーネリアン（紅玉髄）の宝石にじゃれる黒い子犬のイラスト

kernelian — a Japanese solo developer and professional software engineer with 10+ years of coding. I take apps from idea to release entirely on my own. Feature requests or bug reports? Reach me directly on X or email — it's a one-person shop.

Now: polishing Andon (beta)

Contact support@kernelian.com