While organizing ideas for my first iOS app, I remembered an old web app idea called ToneDrill, which I had casually built before to help practice note names on a guitar fretboard🎸. I decided to try turning it into an iOS app🛠️.

I clarified the purpose of ToneDrill, its minimum requirements, and its core features, then organized them in Notion📝.

I was curious to see how well Codex could implement an iOS app from those minimum requirements, so I gave it a try right away💡.

I reviewed the SwiftUI code generated by Codex and worked through the app logic to understand how it was implemented🔍. For now, I was able to create a working app, which felt like a meaningful step forward🚶.

I created the top page UI design for my portfolio website in Figma🎨. I focused on keeping the structure simple and implementation-friendly, and designed the UI with reusable components for each major part.