About · Prof. H
I test them, then I tell you.
A professor of AI and robotics writing for people who want the truth about these tools — including when the truth is “don’t bother.”
I’m Prof. H — a professor of AI and robotics, a former Samsung researcher, and the author of dozens of textbooks on AI and automation. I have spent two decades explaining these systems to students, and this site is the same job with the classroom removed.
I write here because the internet is full of AI advice that was true once. Prices move, free tiers close, tools get quietly worse. So every guide on this site carries the month its facts were checked, and I go back and fix them when the world changes.
What this site actually contains
Three libraries, one method.
Generative AI
Chatbots, writing tools, and everyday uses — including the beginner walkthroughs I hand to my own family.
Browse the library →
Agentic AI
The doing half: agents and automations put through real errands — when to hand work over, and when a checklist still beats a bot.
Browse the library →
Physical AI
The robotics half: landmark papers decoded, humanoids and home robots priced, and the chip industry read from filings.
Browse the library →
How I work
Primary sources first
Vendor pricing pages, government reports, the papers themselves. If a number can’t be traced to its source, it doesn’t appear.
Everything gets a date
“Verified August 2026” is not decoration. It tells you exactly how much to trust a figure a year from now.
Corrections in public
When a widely repeated claim turns out to be invented or stale, I say so in the article — naming the number and why it’s wrong.
Limits stated plainly
Where the free tier ends, which hardware is required, what a demo does not prove. The caveats are the point.
How this site makes money — and how it doesn’t
Advertising pays for this site. There are currently no affiliate links anywhere on it, and I earn no commission from any product named here — several articles say so in their own text. If I ever add one, it will be disclosed at the top of that article. A commission has never affected a ranking, and no company can pay to appear here.
Full details: Editorial & Review Policy · Affiliate Disclosure
Talk to me
The fastest way to reach me is the answer board — ask anything, and the answer is posted publicly so it helps the next person too. More than 130 answers are already searchable in the FAQ.
Or get one short, plain-English email a month: the Lab Report. Replies come straight to me. Unsubscribe anytime.
How this site works, in writing: Editorial & Review Policy · How We Count · Affiliate Disclosure · Privacy Policy · Terms of Use