Amazon signal tracking for authors
BookSylo watches your book's public Amazon pages and tells you when something meaningful changes — rating, rank, price, or a bestseller badge — so you can stop refreshing and get back to writing.
How it works
Paste an ASIN or ISBN, or just search the title with an optional author hint. No Amazon login, ever.
It checks your book's public Amazon pages on a regular schedule and keeps a tidy history of what it finds.
A glanceable notification carrying the actual numbers, the moment a rating, rank, price, or badge changes.
Written for working authors
Every one of these is a moment authors already check for by hand. BookSylo just does the checking.
Refreshing your product page between writing sessions tells you nothing most of the time. Let your phone tell you when something actually moved — the numbers are in the notification, so you often will not even open the app.
Rank is public, and a sharp rank improvement is worth knowing about while it is happening. BookSylo pings you when your rank jumps, not hours later.
Most authors care about one subcategory more than the whole store. Set the Top N you are aiming for, see it drawn on your rank graph, get an alert when your book crosses it, and mute the categories you do not care about.
Name the window as a Campaign — the price drop, the newsletter feature, the ad push — and BookSylo reports where your rank typically sat before it, where it typically sat during it, and the best position observed, per book and per category, with the window drawn on the graph. Pin a private note to a specific day to mark it on your history too.
Kindle, paperback, hardcover, and audiobook, across 22 Amazon marketplaces — grouped into one tidy title card on Pro instead of a long list.
BookSylo tracks any public Amazon book page, not only your own. Add the comp titles and category bestsellers you measure yourself against and learn what good looks like in your category. Flag each one as My Books or Watchlist so your own titles and the ones you are only following stay apart in the list.
If your book stops showing up on Amazon, BookSylo tells you instead of leaving your numbers to fall silent — and tells you again when it is back. It confirms this across several checks first, so a short-lived hiccup never reaches you as an emergency.
Features
Everything BookSylo watches, how it reaches you, and what you can do with it once it arrives.
A new rating lands, or your star average shifts — you hear about it, and which way it moved.
Store rank plus every specific category your book is listed in, with thresholds so small noise stays quiet.
Set the Top N you are aiming for and see the goal line drawn on your rank history graph.
An alert when you break into a Top N, and a Best Seller signal when a category rank cracks the Top 10.
Public price changes on your listing, alongside every other signal.
If your book stops showing up on Amazon you hear about it, and hear again when it is back. Confirmed across several checks first, so a hiccup never arrives as an emergency.
A price drop, a newsletter, an ad push, a launch. BookSylo reports your typical rank before it, your typical rank during it, the best rank observed, and whether you reached the Top N you set — and when you first crossed it — per book and per category.
One campaign can follow several books or editions on Pro. Each keeps its own graph, scale, and goal — nothing is averaged or added together.
Amazon ranks free and paid books on separate lists. BookSylo keeps the two stretches separate on the graph, and a campaign that crossed between them says so.
Every campaign says plainly that this is what BookSylo observed on public Amazon pages during your window — not sales, and not proof of what caused a change.
“Improved 35 spots to #87 in Hard Science Fiction. Best rank this week.” — not “something changed”.
Every category your book ranks in can carry its own threshold, or be muted on its own.
One summary for your whole account, at a time you pick — or only on the days something actually changed, and at least once a week either way.
One heads-up when a campaign window closes, so a finished result never sits unread. On by default, switchable per book, and one alert per campaign however many books it covers.
Nothing arrives at 3 a.m. unless you want it to.
Every rating, rank, price, and milestone moment for a book, in one list.
One book on your home screen — stars, ratings, and rank, what last moved, and when it was checked. Pick the title or edition in Settings.
Start tracking by ASIN, ISBN, or title search with an optional author hint.
Kindle, paperback, hardcover, and audiobook across 22 Amazon marketplaces.
Rating, rank, and price as graphs or a table — 14 days on Free, 90 days on Pro.
Organize your catalog the way you think about it, and anchor a note to the day it happened.
A private flag that keeps the titles you published apart from the ones you are only following. On every plan, and it changes nothing but the way your list reads.
Every book carries a one-line summary of what last changed on it, so you can take in the whole list without opening anything.
Once your list is long enough to need it, filter it by the marks the cards already carry — My Books or Watchlist, a private label, the format, or whether the book is in a running campaign.
Send a snapshot, a single milestone, or a finished campaign result straight to the share sheet. Public metrics only — never your notes.
Edition grouping, Check now, the home-screen widget, and unlimited campaigns are Pro features. Everything else listed above is on every plan — including one campaign at a time on Free.
Coverage
Publishing wide should not mean picking one store to care about. BookSylo can follow the same title across formats and marketplaces, and Pro lets you group the editions you track into one Home card.
A title has data in a marketplace where it is actually listed on Amazon.
Pricing
The core tracking experience is free for one ASIN. Pro adds the room, the history, and the launch-day controls a growing catalog needs.
Free
Watch one edition of one book in one marketplace, with the core signals and controls included.
What's included
Pro
Save 33%Subscribe now and keep $5.99 — the increase applies to new subscribers.
May include a 14-day free trial where available.
For multiple books, editions, marketplaces, and the comp titles you want to keep close.
What's new
Trust & privacy
BookSylo reads the same Amazon pages your readers see. It never touches your KDP account, and there is nothing about sales or royalties in it.
FAQ
No. BookSylo never asks for an Amazon login and never stores Amazon credentials.
No. BookSylo only reads public Amazon page signals such as ratings, rank, price, and badges. It is not a sales or revenue tracker.
No. BookSylo is an independent product and is not affiliated with Amazon.
All 22: the US, UK, Germany, France, Italy, Spain, Canada, Australia, Japan, India, Brazil, Mexico, the Netherlands, Sweden, Poland, Turkey, the United Arab Emirates, Saudi Arabia, Egypt, Belgium, Ireland, and Singapore. A title has data in a marketplace where it is actually listed on Amazon.
Yes. BookSylo tracks any public Amazon book page, so the comp titles and category bestsellers you measure yourself against can sit alongside your own books.
A named promotion window. Give it a name, a start, and the books it covers, and BookSylo reports what their public Amazon signals did while it was running: your typical rank before the window, your typical rank during it, the best rank observed, and whether you reached a Top N you set and when you first crossed it — per book and per category, with the window drawn on the graph. Free and paid Amazon lists are kept separate, and a campaign that crossed between them says so. Every campaign states plainly that this shows public observations, not sales, and does not prove what caused a change.
Free runs one campaign at a time, on its one tracked book, all the way to a finished result you can share. Pro removes the limit: unlimited campaigns, a whole series watched through one promotion, and a campaign that can start up to 90 days back instead of 14.
You hear about it. If BookSylo stops finding your book on its public Amazon page it tells you, instead of just going quiet — and tells you again when the book is back. It confirms this across several checks first, so a short-lived hiccup never reaches you as an emergency. BookSylo can only report what it can see: a public page that is not returning a product. It cannot tell you why.
Not for the Free plan — one book can be tracked without registering. A registered account is required to purchase or restore Pro.
The Free plan lets you track 1 book. Pro is $5.99 per month, is required to track 2 or more books, covers up to 50 Amazon ASINs, and may include a 14-day free trial where available.
Every tracked book is checked on a schedule, and your most important books are checked most often. The first 10 books in your library are checked 6 times a day, books 11–25 three times a day, books 26–35 twice a day, and books 36–50 once a day. Pro tracks up to 50 books. You can pin up to 3 books to keep them in the most frequent group, which moves them ahead of others rather than adding checks. These are the frequencies BookSylo aims for, not a guarantee: Amazon or a temporary outage can delay a check.
Not for you. The price you subscribe at is the price you keep for as long as your subscription stays active — anyone already paying $4.99 stays at $4.99, and if you subscribe now at $5.99 you keep $5.99. Pro is planned to move to $8.99 per month as BookSylo grows, and that price applies to new subscribers, not to a subscription that is already running.
BookSylo regularly checks the public Amazon pages of your tracked books, detects meaningful changes, and sends them to your device with the actual numbers in them. Quiet hours, pause, snooze, and per-book and per-category thresholds are all yours to set. Two alerts stand apart from the rest: listing health tells you when a book stops showing up on Amazon and when it is back, and a campaign result arrives once when a campaign window closes — on by default, switchable per book, and one alert per campaign however many books it covers.
Only public Amazon-facing values: the book title, the public metrics, the date, and a small BookSylo signature. You can share a current snapshot, a single Activity moment, or a finished campaign result. Your private labels, notes, and account details are never shared.
Your tracked books, notification preferences, an optional account email, and any support diagnostics you choose to send. It does not store Amazon credentials.
BookSylo is a mobile app for iPhone, iPad, and Android.
Get the app
Add one title, set your alerts, and let BookSylo take Amazon off your daily checklist. No Amazon login, and no account needed to start.
BookSylo is a mobile app for iPhone, iPad, and Android.
