KDP niche research, right on Amazon
The problem
Before you write a low-content book or a journal, you want to know whether anyone buys in that niche, and how crowded it is. Doing that by hand means opening product pages one by one, copying BSRs into a sheet and guessing at sales.
How it works (one moment)
Open a book's product page on Amazon.com. NicheLens shows an estimated sales and royalty number based on the page's Best Sellers Rank. While you type a search, the free keyword helper reads Amazon's own suggestion dropdown and gives you a "copy all suggestions" button.
Free vs Pro
| Free | Pro ($39 one-time) | |
|---|---|---|
| Product-page estimates | 10 per day (resets at local midnight, per spec) | Unlimited |
| Keyword suggestion helper | Yes (per spec) | Yes |
| Niche score (0–100) | — | Yes |
| CSV export | — | Yes |
| Saved niches | — | Up to 200 |
You unlock it with a Gumroad license key in Options. No subscription.
Honest limits: what NicheLens is not
- The numbers are estimates. Sales and royalty figures come from an editable BSR-to-sales table, not Amazon or KDP data. Treat them as a guide, and edit the table if you have better numbers.
- Amazon.com (US) only in this version.
- No background scraping. It reads only the Amazon pages you open.
- Not affiliated with Amazon or Kindle Direct Publishing.
- It doesn't pick your niche for you. The niche score is a summary, not a promise of sales.
FAQ
Where do the sales estimates come from? From a BSR-to-sales table you can edit. They aren't Amazon or KDP data.
Does it work on Amazon UK or other stores? Not in this version. It's amazon.com (US) only.
Is Pro a subscription? No. It's $39 once.
Get it
Get KDP NicheLens Pro for $39. It works with the free NicheLens extension.
FACT-CHECK (internal): Pro features, the estimate source and US-only were OBSERVED on Gumroad on 2026-10-13. The 10/day limit and keyword helper come from research/specs/kdp-nichelens.md, and the playbook confirms "free 10/day" (v0.1.2 PASS). The niche-score method is UNKNOWN, so it isn't explained here. CWS status is UNKNOWN.