Is this course worth it?
Before you pay, tell apart information anxiety from a course that actually fits you.
Fill in four fields and hand a "course due diligence" to ChatGPT, Gemini, Claude or Perplexity. It digs through PTT, Dcard, Threads, Vocus and YouTube comments for real reviews, checks out the instructor, and ends with a clear buy or don't-buy. The prompt is in Chinese on purpose: it searches Taiwanese communities.
About you
The more specific, the sharper the verdict
Prompt version
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Prompt preview (Chinese)0 characters
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01 · Why I built it
The seller picked the reviews on the wall
A course's review wall shows 100 glowing reviews because the seller picked them. The most important rule: if it can't find criticism, it says so, and explains why (too new? the community lives in a private Discord?).
02 · How to use it
Three steps, no sign-up
Fill in four fields
Course URL, your background, the problem you want solved, your budget. The more specific, the sharper the verdict.
Pick a version
Full works with any AI; Lite fits in a URL and fills itself in; Threads pairs with Meta AI to dig up scattered reviews.
Send it
Every button copies to your clipboard first. Platforms that accept a prefill get it automatically; for the rest, open a new chat and paste.
| Version | Length | Use with | Behaviour |
|---|---|---|---|
| Full | ~2,100 chars | Any | Seven-part report. Too long for a URL, so the button copies it; paste into a new chat |
| Lite | ~750 chars | ChatGPT / Claude / Perplexity | Short enough for a URL, so the question fills itself in |
| Threads | ~1,400 chars | Meta AI | Collects evidence only, no verdict; copy and paste |
03 · What it checks
Not just reviews: the instructor too
The official pageWhat you are actually buying
Price, one-off or subscription, refund policy, number of lessons, last update, and whether any lesson is still marked "in production" (you'd be buying futures).
Real voicesAway from the official site
PTT, Dcard, Threads, public Facebook groups, Vocus, blogs, YouTube comments. It searches both positive and negative keywords.
The instructorWhere course quality starts
Two columns: facts that can be cross-checked, and claims only they make. Then one question: do they practise this field, or mainly teach it?
AlternativesThe opportunity cost
Whether free resources are enough. An instructor's free content is usually the floor of the paid course.
04 · Evidence grades
Every review gets a stamp
The most common way AI gets reviews wrong: it finds the seller's "100+ happy students" wall and concludes the course is well loved.
Independent long-form reviews
Most trustworthy
Scattered forum and social posts
Read the trend, not single posts
Posts with discount codes or affiliate links
Treat as ads
Testimonials on the seller's site
Not evidence of reputation
05 · Nine red flags
Checked one by one at the end
Each marked ✅ fine, ⚠️ watch out, or 🚩 high risk.
- Artificial scarcity and countdowns
- No refund policy
- Promised income or results
- Only the seller's own testimonials
- On sale before it is finished
- Closed community, no real feedback
- No verifiable work by the instructor
- Instructor's record can't be checked
- Free resources already cover it
06 · Honesty rules
The most important part of the prompt: no criticism found is not the same as a good reputation. No made-up reviews or links, a real URL for every quote, facts kept apart from inference, and if the price isn't published, it says so instead of guessing.
07 · FAQ
Questions
Does it cost anything? Do I need an account?
No and no. Free, no sign-up, open source. Just open it and use it.
Does anyone collect what I type?
The tool is a static page with no backend. What you type stays in your own browser for next time; when you send it, it goes to the AI you picked.
Why do some platforms need me to paste?
Prefill parameters are a convention, not a public API, and Gemini and Meta AI don't have one. So every button copies to your clipboard first; the prefill is a bonus, and nothing breaks if it stops working.
Can I trust the AI's verdict as is?
No. Check the results yourself and open the cited links. That's why the prompt demands a real URL for every quote.
What is the Threads version for?
There are reviews on Threads that outside search engines can't reach, and the honest ones are often in the replies. The Threads version, used with Meta AI, only collects them without a verdict; paste the list back into the full report as grade B evidence.
Can I modify it?
Use it however you like, and share your changes too. The source is on GitHub.
Who made this
Hi, I'm Eric
Former Senior Technical Manager (E10) at MediaTek, two-time founder. I want to help people who, like me, feel stuck at work and want to find their passion, use AI to try things and discover work that makes them happy.
Opens Substack to confirm. One more click and you're in.