Pick your category before you writeLet the category data speak first
Ease-of-entry scores for every Kindle category, page-one composition for your keywords, and breakout-book evidence — know whether a niche is enterable before you write. Every number comes from real best-seller scans; no estimated search volumes, and every figure is traceable. And once your book is live, AI review analysis covers listings and books.
Category scan free · No account needed · 100 free credits on signup
The journey doesn't end at publication — the same AI review-analysis engine reads your book's reviews: where readers stall, what they dislike, prioritized and anchored to real quotes.
From the pre-writing call to post-launch readers
The first three steps need no account — size up the direction, verify the evidence, lock your keywords. Step 4 waits until your book has readers.
Size up the direction
Can you squeeze into this niche? The scanner ranks every Kindle category's ease-of-entry score high to low — no signup, no credits.
Open the category scannerVerify the evidence
Don't stop at scores — open a category dossier: the top 20 books listed one by one, with breakout proof that newcomers still break in.
Browse a category dossierLock your keywords
Put candidates side by side, sanity-check words with the keyword lookup and Keyword Duel — who sits on page one, is there room left.
Try the keyword lookupOne scan, four ways to use it
Every path starts with the same move: a free scan of every Kindle category.
Know if a direction is enterable
Ease-of-entry score plus breakout-book evidence — how strong the incumbents are, whether newcomers still break in. See it before you write a word.
Pick keywords at the right density
See who sits on page one of your word — the books' review counts and age — and whether there's room left.
Compare candidate categories
Put two or three directions side by side on ease of entry, incumbent strength, and breakouts — back the one with better odds.
After launch, hear your readers
The same AI engine reads book reviews: where readers stall, what they dislike — prioritized, anchored to real quotes.
Turn best-seller scansinto pre-writing evidence
Category ease-of-entry scores, keyword page-one composition, breakout-book evidence, and book review diagnosis — the full chain from topic and keyword choice to post-launch iteration.
Ease-of-entry scores for every category
Every best-seller category in the Kindle store, scored: median review count, weak-competition share of the top 20 — free, no signup.
Breakout-book evidence
Each category flags recent books that still broke into the front ranks — proof the front ranks aren't locked up by the old guard.
Per-category dossiers
One dossier per category: the top 20 listed book by book, scan window marked, every number checkable.
Keyword page-one composition
Search the word you plan to write for — see what page one is made of and whether it's enterable at a glance.
Keyword Duel
Drop candidate keywords into a head-to-head — competition density side by side, no more gut-feel picks.
Book review diagnosis
Reader reviews become a prioritized fix list, every item anchored to real quotes — the same engine also runs product listings.
Don't pick categories on gut feel — or copied lists
Hunches, copied best-seller lists, and estimated search volumes are bets on luck. Amzanalyst scans the real best-seller charts: ease-of-entry scores, incumbent strength, breakout-book evidence — every number from real scan snapshots, checkable. Know whether a category is enterable before you write.
Picking categories by gut and lists
Blogger picks and copied best-seller lists — enterability is pure luck
Ease-of-entry scores first
Every category ranked by ease of entry — median reviews and weak-competition share at a glance
Trusting search-volume estimates
Tool-given search volumes are model estimates nobody can verify
Real scan snapshots
Every number from actual best-seller scans — window marked, refreshed periodically, checkable
Paying monthly for mega suites
A pile of unused features, with book data as an afterthought
Built for people who write
Categories, keywords, reader reviews — the toolchain is designed for KDP authors only
Your next book
Scan your first category
The category scanner is free and needs no signup — ease-of-entry scores and breakout evidence for every category are viewable now. Sign up to add 100 trial credits (valid 30 days) for keyword tools and book review diagnosis.
After your trial credits run out, upgrade a plan anytime to keep going.
Curious what the output looks like? See a real book diagnosis sample.
Review analysis is based only on publicly available review data.