About

Hi, I'm Henry, an independent developer in Taiwan. KeepOnFirst is where I document product work and engineering decisions: what I built, why I chose that path, and which results remain unverified.

What I Do

I currently maintain small products including KofAI Note, WidgetLearner, KeepOnFirst Focus, and BabyDay. I also run experiments in browser 3D, Agent Skills, and AI-assisted development. Articles start from real products, code, measurements, or public data rather than rewritten news.

Work you can verify

Product pages, App Store listings, and public code provide evidence readers can check against the articles. Medium preserves the original publication of selected pieces.

How the articles are made

I keep sources, test methods, dates, and limitations in the article. A result only supports the sample that was actually tested; an unverified outcome is not presented as settled.

How AI is involved

I use AI to assist research, organization, and development. Topic selection, fact checking, testing, judgment, and publication remain my responsibility. When automation affects how a reader should interpret a result, the article explains its role.

Corrections

If a technical detail, link, or data point is wrong, email me. I will correct confirmed errors and note changes that affect the conclusion instead of only changing the publication date.

Why KeepOnFirst?

The name comes from a simple idea: the apps and tools worth building are the ones you'd keep on your phone's first screen. Not buried in folders, not forgotten after a week. If something doesn't earn that spot through genuine utility and respect for your attention, it probably shouldn't exist.

Get in Touch

Use the email below for product feedback, article corrections, or collaboration proposals.