Book niche research for self-publishers: opportunity scores, trademark screening, BSR backfill, and one-click sync to Inkario.
Users
6
0 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#239K
#200K among extensions
Version
1.14.5
updated 25 Aug 2026
Users
monthly, 2 months
Latest, 19 Oct 2026:6 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 months
Latest, 19 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Inkario — Self-Publishing Research
Inkario turns any Amazon book or search page into a research surface for Kindle Direct Publishing (KDP) authors, and keeps your own publishing numbers current without a spreadsheet.
RESEARCH, ON THE PAGE YOU ARE ALREADY LOOKING AT
- Opportunity score on any book page, with the real Best Sellers Rank — measured, not estimated.
- Niche analysis: score a whole search-results page and backfill each competitor's true BSR.
- Trademark and copyright guard: flags high-risk brands and characters, or confirms public-domain source material, before you commit to a title or keyword.
- Live HUD: see what your Inkario account already knows about a book or niche — owned, analyzed, tracked or saved.
- Track author: follow a competitor from any of their book pages, with real BSR and price feeding your watchlist.
- Review capture: visible customer reviews are captured with a book, powering review intelligence in the app. Reviewer names are reduced to initials in your browser before anything is sent.
YOUR OWN KDP DATA, KEPT FRESH
- Sales and royalties from your own KDP sales report.
- Bookshelf, listing fields, rank, reviews and A+ content status.
- Keyword rank tracking for the keywords you pin.
- One freshness panel in the toolbar: what is current, what is due, and a button per row to refresh just that.
YOU DECIDE WHAT RUNS
Nothing reads a page until you accept the consent card shown on first use. Daily background sync is OFF until you switch it on, and when it is on it opens one unfocused tab at a time to a page it already has permission for, then closes it. No Amazon password or cookie is ever read.
Connect once from the toolbar popup. An Inkario account is required for syncing; a free tier is included.
Inkario is an independent tool, not affiliated with, endorsed by, or sponsored by Amazon. Amazon, Kindle Direct Publishing and KDP are trademarks of Amazon.com, Inc. or its affiliates.
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Chrome Web Store search rankings
Where Inkario — Self-Publishing Research appears when people search the store, with the 30 day change
*://*.amazon.com/**://*.amazon.co.uk/**://*.amazon.de/**://*.amazon.ca/**://*.amazon.com.au/**://*.amazon.fr/**://*.amazon.it/**://*.amazon.es/**://*.amazon.com.mx/**://*.amazon.co.jp/*and 7 more
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