Next Gen KDP research Tool · by a publisher, not a guru

Amazon lies to you with numbers.

Sponsored slots. Shifting ranks. Personalized results. The scoreboard looks clean — it isn't.
Fihrist Lab shows you the real niche, before you waste weeks writing the wrong book.

No monthly fees$19.99 onceLocal research dataChrome 109+
Install Fihrist Lab

One-time $19.99 payment · lifetime access · no subscription

Why Fihrist exists

Stop choosing niches from surface numbers.

Fihrist connects the evidence Amazon leaves scattered, so you can decide what to publish, improve, or avoid before months of work are at risk.

FIHRIST LAB
Publisher
01Result count
Competition depth

See whether the niche is genuinely crowded.

02Page one
Demand + BSR

Judge whether buyers are consistently spending.

03Sponsored
Organic evidence

Separate real demand from paid visibility.

04Keywords
Opportunity gaps

Find useful language competitors have not owned.

05Reviews
Buyer complaints

Build the book readers are still asking for.

Inside the lab

Make sure the niche deserves your time.

One Tool, 10 Features, 0 servers. Here's each one.

#1

Niche Ledger

Count the books that actually compete.

Amazon's “1,000+ results” banner counts ads, duplicates, and off-topic books. Fihrist Lab scans the real listings, drops the noise, and shows the only number that maps to your true competition. Once a scan settles, it's frozen — refresh won't change it.

#2

Niche Analyzer

Demand modeled honestly — range and all.

Most tools hand you one confident number they can't possibly know. Fihrist Lab models demand from on-niche evidence and gives you a range. Thin evidence widens it; no usable signal and it says so. No fake precision, ever.

#3

Keyword Lab

Keywords pulled from Amazon, not a recycled list.

Stop copying the same keyword pack a thousand publishers already own. Fihrist Lab probes Amazon's own autocomplete — book-first — for the long-tails real readers type. It runs in the background; close the popup and it keeps going.

#4

Keyword Spy

What a listing truly ranks for — verified.

“It's in the title” and “it ranks for it” are not the same thing. Fihrist Lab checks live page-one results and keeps only the keywords a listing organically ranks for. A sponsored placement doesn't count as a rank.

#5

Opportunity Gap

Your next book's to-do list is in the bad reviews.

The 5-star reviews flatter the author. Fihrist Lab reads the 1–3 star reviews and surfaces the complaints that repeat — the see-through pages, the tiny font, the missing index. With optional on-device AI, the review text never leaves your machine.

#6

Category Analyzer

Real category placements, not guesses.

Pick categories from evidence, not a hunch. Fihrist Lab reads the exact categories and ranks Amazon actually exposes for a listing — and where a search lands. Missing data is left blank, never invented.

#7

The Tracker

“Is it actually selling?” finally gets an answer.

One BSR snapshot tells you nothing. Fihrist Lab samples rank, sales, revenue, and category daily and plots the movement — observational, labeled honestly, with no fake precision painted on the chart.

#8

Promo-Aware Pricing

Read the real price. Flag the real discount.

Grabbing any price-shaped number off the page gives you garbage revenue math. Fihrist Lab reads the actual current price, ignores stray strikethroughs, and only flags a promo when Amazon truly rendered one — then models gross from it.

#9

The Vault

The niches worth remembering, kept by you.

Every analysis you save lives in your browser — demand range, median BSR, estimated revenue — ready to compare later or export to CSV. Your research history belongs to you, not a cloud you rent.

#10

TM Check

A trademark gut-check before you commit a title.

Publishing a title nobody owns shouldn't be a coin flip. Fihrist Lab screens your phrase against rendered USPTO results and known publishing risks, flagged for relevance. It's a research aid to ask better questions — never legal clearance.

Works where you sell

Four marketplaces. Native numbers.

Localized prices, ranks, and formats — parsed correctly, not “close enough.”

🇬🇧.co.uk
🇺🇸.com
🇩🇪.de
🇫🇷.fr

Why this exists

Built by a KDP publisher. Not a SaaS team.

“I built this because I stopped trusting my own research tools. They kept making Amazon look cleaner than it is — confident demand numbers, banner counts, page one treated like the whole market. I knew better, because I'd been burned by exactly that.”

The longer story

I’ve been publishing on KDP since 2011 — on and off for years. When I came back recently, I was genuinely impressed by how many tools exist now. A lot of them are good. I paid for several.

But I kept catching myself thinking: “I can do most of this manually.”

I was already checking niches with spreadsheets, formulas, and my own habits — and quietly resenting the monthly bill for a cloud I barely logged into. So I built the assistant I actually wanted: one that reads the real evidence, tells me when it isn't sure, runs on my own machine, and never asks for a subscription. It turned out other publishers wanted the same thing.

Compare before you choose

See how Fihrist Lab fits your workflow.

Choose a KDP research tool for a balanced, source-led comparison of pricing, features, privacy, and practical fit.

FIHRIST LABBrowser-based KDP intelligence
Independent comparisons · facts last verified August 5, 2026Browse all comparisons

Pricing

One payment. Once.

If it saves you from one bad niche, it already paid for itself.

Fihrist lifetime license

Unlock the complete research toolkit.

Read the Amazon evidence, compare the niche, and keep the research you build.

$19.99USD · one-time
  • Niche demand analysis
  • Keyword discovery
  • Opportunity-gap insights
  • Book and BSR tracking
  • Competition research
  • Tracking-data export
  • Lifetime access to the extension
Get Lifetime Access

One payment. No subscription.

One-time payment for lifetime access to the current Fihrist extension license, subject to the Terms of Service.

Google Chrome 109+ · Restore with your purchase email

Straight answers

The honest FAQ.

Is this another “make money on KDP” tool?

No. It won't promise you sales — nothing honest can. It's a research instrument that helps you read Amazon's real evidence and make a better call. That's the whole job.

Does it give me Amazon's actual search volume?

No, and be careful of anyone who claims they do — Amazon doesn't publish it. Fihrist Lab models demand from real on-niche signals and shows it as a range with the uncertainty included. Honest modeling beats fake precision.

Where does my data go?

Your research data stays in your browser. Live research checks go directly to Amazon and USPTO, and the relevance model runs locally. Stripe securely processes payment information as described in the Privacy Policy.

Does TM Check clear my title legally?

No. It's a research aid that screens rendered USPTO results and known publishing risks so you can ask a professional better questions. It is never legal clearance, and it says so.

Will it work where I sell?

It supports amazon.com, amazon.co.uk, amazon.de, and amazon.fr — with localized parsing for prices, ranks, and review counts, not “close enough” guesses.

Do I have to keep the popup open while it works?

No. Keyword Lab, Niche Analyzer, and TM Check run as durable background jobs. Close the popup, come back later — your scan is still going.

Why one payment instead of a subscription?

Because you research in bursts, not 30 days a month. Renting a cloud you use twice a quarter never made sense — it didn't to me either, which is why I built this.

How do I restore my purchase?

Choose Restore purchase in Fihrist Lab and enter the email used at checkout. Follow the secure login link to reactivate an authorized browser profile after reinstalling.

What does lifetime access mean?

It means a one-time payment for lifetime access to the current Fihrist extension license, subject to the Terms of Service. It does not promise that third-party services will remain available forever.

Available for Chrome

Stop trusting the result count.

Pay once. Restore with your purchase email. Keep your research in your browser.

Install Fihrist Lab

$19.99 once · no subscription