Update: KDSPY Pro Just Released — Includes ChatGPT & AI Integration

Last Software Update: 21st June, 2024.

Power Tools for Authors

Competitor research, AI market intelligence, keywords, book tracking, revenue estimates and more – all in your favourite browser.

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As featured in:

Your First 10k Readers
Rocking Self Publishing
Creative Indie

"Love the KDSPY software to help me see trends in the industry"

Sharon Hamilton Kuods

Love the KDSPY software to help me see trends in the industry, as well as verify how I am doing, in a snapshot graph, compared to other authors in my genre. I also use it when I'm contacted by authors I don't know, or when I want to learn about what successes others are having that I can learn from.

Sharon Hamilton

NY Times & USA Today Bestselling Fiction Author

"One of the best tools an author can have in their toolbox"

Lise Cartwright Kudos

One of the best tools an author can have in their toolbox for finding the right category to get ranked in, identifying keywords and tracking your books and those of other authors for sales ranking!

Lise Cartwright

Author, Writer & Coach

Why do over 65,048+ fiction & non-fiction

– AND hundreds of WSJ, NY Times & USA Today – bestselling authors use KDSPY Pro?

Because many have grown their platform, book sales, and income by leveraging the research tools and competitor insights gained with KDSPY.

KDSPY sits in your browser as your book research assistant

Unlike isolated software applications buried on your computer, KDSPY sits in your browser and becomes your 24-hour on-demand research assistant when you're browsing Amazon.

Reverse engineer the bestseller categories
in a single click

When you want a detailed breakdown of any of the 25,000+ Kindle, book, or audiobook categories on Amazon, simply click on KDSPY from within your browser. Within seconds, you'll understand the competitive landscape of that category, the potential estimated profit from a first-page listing, and receive a detailed breakdown of each book's crucial metrics.

See how many books you need to sell in 24 hours to rank #1-20

To get Amazon's algorithm to notice your book, you need to sell a specific number of copies within 24 hours to secure a category ranking. After identifying an ideal category based on revenue potential, just hover over the red 'information' icon with your mouse, and get the estimated daily sales required to compete for a first-page position.

Discover the popular trends & keywords in any book category

What better way to find bestselling niches and get ideas for your next book than by modeling what's already working for other successful authors? KDSPY shows you the popular trends in any market, reveals the bestselling niches to go after, and even provides a word cloud to help you craft a compelling title.

Analyse keywords in-depth for profit and ranking potential

Perform any keyword search in KDSPY, and instantly receive its revenue potential along with hundreds of additional (A-Z) keyword suggestions—all exportable for AMS ads. You'll also get competitor counts and their estimated monthly revenue. Our keyword analysis feature delves even deeper, revealing the likelihood of ranking on Amazon for that keyword, too.

Spy on other authors & publishers and model their bestselling books

KDSPY evaluates any author's page, providing a comprehensive statistical overview in mere seconds. With just one click, you can view the sales rankings for their Kindle, paperback, hardcover, and audiobooks, and see projected sales and revenue categorized by each book format.

Track the sales rank & revenue of any book over 30 days

Monitor an unlimited number of Kindle, paperback, hardcover, and audiobooks with our book tracking tool. KDSPY retrieves the sales rank of your competitors' books every day, visually presenting their performance in charts, complemented by projections of their daily and monthly revenue.

Get cutting-edge AI insights into niches & keywords with ChatGPT

KDSPY Insights offers cutting-edge prompts tailored for AI, allowing you to effortlessly obtain keyword and target market insights with a single click through ChatGPT. Simply execute these sophisticated prompts on a book category, specific keyword, or a competitor's book to delve deeper and uncover unparalleled analysis and insights.

Supports data from 12 country specific Amazon Kindle stores

You can use KDSPY from anywhere in the world. Additionally, KDSPY Pro provides country-specific data from Amazon stores in the USA, UK, Canada, Germany, Australia, Italy, Spain, France, India, Japan, Mexico, Brazil, and Poland (just added).

Rebecca Hamilton used KDSPY to create over 400 bestselling authors

New York Times, USA Today, and Wall Street Journal bestselling author Rebecca Hamilton always had a knack for marketing. However, she used to spend countless hours on market research for herself and hundreds of her author clients. 

Then she found KDSPY, which took out all the guesswork and freed up more time for her to focus on other areas of her career. Using KDSPY, she was able to help over 400 of her author clients hit the "New York Times" and "USA Today" bestseller lists.

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Browser Integration

KDSPY integrates directly into your browser. That means you can do your research right on Amazon, not with some lame software (that you'll forget about) buried on your computer.


Lightning Speed

KDSPY was painstakingly coded from the ground up to be the fastest book research tool on the market. Plus, the data that KDSPY reveals is available from a single click in your browser.


Single-Click Install

KDSPY installation is so simple a child could do it. In fact, it takes just one click and in 4 seconds, you’re done. And because it installs into the browser, it uses very little disk space.


"Now nearly every book I publish is a bestseller"

“KDSPY is hands-down the most valuable software I have right now for my kindle business. I have been publishing books on Amazon for since last fall, but things never really took off until I started using Kindle Spy. This software made it so easy for me to quickly see profitable niche markets in my areas of interest and now nearly every book I publish is a bestseller! In the next few months, I will be making enough money to finally quit my day job – yahoo! I actually use KDSPY for more than just finding profitable niches to write books on. I also use it to follow my own books. I use it to see, at a glance, how my own books are doing, so that I can gear my marketing efforts towards the ones that need it, and celebrate the ones that don’t. Honestly, as a publisher, writer, and business owner, KDSPY is the first thing I check every morning and the last thing I check every night.”

Barb Asselin

College Professor & #1 Bestselling Author


"Opened my eyes to the untapped potential"

I am quite new to Kindle and found it quite difficult to understand how to do proper research and understand what categories to focus my energy in. KDSPY cuts out all the legwork and in a matter of seconds you get a complete and detailed spreadsheet with up to the minute average sales revenue, amazon best sellers rank, number of reviews and total revenue for your chosen niche. It's invaluable and certainly opened my eyes to the untapped potential awaiting kindle publishers. Another plus is the "word cloud" feature of the top keyword in the titles per niche. That alone is a goldmine and we all know the power of a popular eye catching title! However, despite all these features and benefits, Wesley's constant hands-on backup support in answering any queries I had about using KDSPY and his willingness to listen to feedback sets this product apart from others I have brought. If you are looking to grow and rapidly expand your Kindle publishing empire, KDSPY will get you there faster.

Ntatu Allen

Yoga & Meditation Teacher / Author

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"I’m launching a new illustrated kids book series in the next few months and I’m researching all my categories and keywords—as well as examining what other successful authors in my genre are doing—with KDSpy. So far, KDSpy is an incredible tool, far superior to KDP Rocket. There is no comparison."

– Mike Moreu, Childrens Book Illustrator & Author

"KDSPY is probably one of the most valuable tools an indie author can utilize. It’s exactly the app I needed to uncover all the info—accurate data, not guesses—on which subgenres sold well and why."

– C.S. Lakin, Novelist, Copyeditor & Writing Coach

"Wesley, Just wanted to let you know that KDSPY is my new favorite tool for Kindle research - it blows everything else away! It's lightning fast and super-simple to use. I've been using it the last few days..and all I can say is I wish I had this years ago. Great work!"

– Ed Lewis, Self Published Author

"This levels the playing field in so many ways. Now it's much easier to compete and create a product with more than an educated guess. My wife and I love KS4. It is easy to use and the pdf that goes with it could be sold as a product but it is free. Thanks!"

– Anthony Kollar, Self Published Author

Your investment is


We're so confident that KDSPY will save you time on book research and make you more money that we offer a full 60-Day – no hoops to jump through – Money-Back Guarantee.

Try it for yourself, and if you don't see the tremendous value it gives you in the first 60 days, simply let us know and we'll refund your money in full, on the spot — no questions asked.

Join 65,048+ self-published authors using KDSPY Pro

Get instant access to your unlimited KDSPY Pro account today for a "one-time" payment of $197 just $69 (with zero monthly recurring fees). Once your payment is complete, you'll receive an email with installation and login details, along with tutorials, right away.

KDSPY Pro:  Instant Access & Advanced Tutorials  ($197 Value)
FREE Updates: We've rolled out over 412 updates since 2014
BONUS #1: The Book Publishing Cheatsheets ($141 Value)
BONUS #2: Create an Author Website Course ($197 Value)
BONUS #3: Book(s) ROI Tracking Spreadsheet ($27 Value)
BONUS #4: The Art of Niche Intelligence Course ($197 Value)

Total Value of $759 (Today: $69)

Your investment is risk free with our 60-day money-back guarantee.

Unlimited Account  

Ongoing Updates

60-Day Guarantee

Regular Price $197– Today: $69


No Monthly Recurring Fees – Ever

Credit Cards

Got questions?

Here are answers to some of the most common questions we get about KDSPY.

Does KDSPY work on Mac and PC?

Yes. KDSPY is a browser extension compatible with both PC & Mac. And the good news is, installation takes less than 4 seconds no matter what computer you’re using – seriously!
(Note: KDSPY will not function on iPads, Tablets or Smartphones).

Can the results be exported?

Yes. Absolutely. KDSPY will analyse all the Kindle, Paperback or Hardcover books in any category, and give you an export of the results in under 29 seconds. KDSPY also provides an export of the word cloud, keyword results, author analysis and tracking data.

Does this work on any browser?

KDSPY will operate on Google Chrome, Mozilla Firefox, Microsoft Edge, Opera & the Brave browser – on an Apple, Windows, Chromebook or Linux system. Due to the declining popularity of other browsers, it will unlikely be supported on others in the future.

Can I install on multiple devices?

Yes. Your purchase comes with a DUAL license. Which means you can install KDSPY on up to two (2) devices that you own personally. Many people today use a desktop and a laptop, so we'd never ask you to purchase again to use KDSPY on an additional computer.

Do I get future updates to KDSPY?

Yes. If you lock yourself in today for the insane price of just $69 (one-time fee) – that’s all you will ever pay. You will get ALL future fixes & feature updates to the software. We take user feedback very seriously. In fact, we’ve made over 412 updates and rolled out over 20 advanced features since KDSPY was released in 2014.

Does this work for fiction authors?

KDSPY was originally created for my own "non-fiction" publishing business. However, being able to research multiple fiction categories, keywords and competitors with the speed of KDSPY – will save you countless hours of research time when trying to see which genres may be the most profitable to enter. It's why 65% of our customers are in fact, fiction authors.

Does this work internationally?

Yes. KDSPY will work anywhere in the world to pull data from one of the supported stores. Initially, KDSPY was created to pull results from the largest Amazon marketplace; the US. However, due to popular demand, KDSPY Pro now supports results from specific stores in the UK, Canada, Germany, Australia, France, Italy, Spain, India, Japan, Mexico & Brazil.

Some customer emails

Here's a little peek inside our inbox on some emails we've received from current users.

Georgy Kudos
Martin Kudos
Amber Kudos
Pam Kudos
Annette Kudos
Micah Kudos
Chris Kudos
Berenice Kudos
Bill Kudos
Corey Kudos
Mike Kudos
Lindo Kudos

You're protected by our 60-day money-back guarantee


Windows Compatible


Mac Compatible


Firefox Compatible


Chrome Compatible


Edge Compatible

Copyright 2014 – 2024 © LeadsClick LTD.

Registered in England and Wales, Company No: 09309821.
Trading as Publishing Altitude. All Rights Reserved.

Available on Chrome & Firefox, KDSPY—known previously as Kindle Spyis not affiliated with Amazon or any of its subsidiaries.

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Example AI Report (ChatGPT)

The below is one example of a total of eleven different report types