Most “KDP tools” do not touch your ads at all. They help you choose a niche, research keywords or design a book. Most tools that do manage Amazon ad bids were built for Amazon sellers, not books, and are priced for them. Sort tools by the job they do and the choice becomes much simpler.
Disclosure: AcosControl is our product, and it is listed below with everything else. Prices and features were checked on each vendor’s own website on 25 September 2026 and change often, so confirm them before you buy.
Three different jobs
- Research tools help you decide what to publish and which keywords to try. They never see your ad account.
- Bid managers connect to your Amazon Ads account and change bids for you, automatically, towards a target.
- Reporting and control tools connect to the account, show you what is working, and let you make changes quickly, but nothing changes unless you change it.
You do not need one of each. Most authors need a research tool before publishing and, once several books are advertised, something that saves them the weekly spreadsheet.
Research tools
| Tool | What it does | Touches your ads? | Price |
|---|---|---|---|
| Publisher Rocket | Keyword, category and competitor research, plus an Amazon Ads keyword generator that builds lists to paste into campaigns | No — research only | $199 one-time |
| KDSpy | Browser extension: category and keyword research with revenue estimates, rank tracking | No | $79 one-time |
| BookBeam | Niche finder, keyword and category research, listing tools, a Chrome extension | No — keyword and target research | $29–$119 a month |
| Book Bolt | Niche research plus cover and interior design, aimed at low-content publishers | No | See their site |
These are worth their price when you are choosing what to write or publish next. Once a book is live and advertised, your own search term report is better keyword research than any of them, because it shows what real buyers typed.
Bid managers
These change bids for you, usually every day, towards an ACOS or profit target. Of the ones we checked, only Ad Badger says on its own site that it supports KDP ads. The others are built for Amazon sellers of physical products and do not mention books, which does not mean they cannot work, only that you should ask before you pay.
| Tool | Says it supports KDP? | Price |
|---|---|---|
| Ad Badger | Yes — but says KENP and lockscreen ads are not fully supported yet | From $275 a month |
| Helium 10 Ads | Not mentioned | Diamond plan, $279–$359 a month, plus 2% of ad spend |
| Scale Insights | Not mentioned | From $78 a month, priced per product |
| Adspert | Not mentioned | €99 a month plus 1.7% of ad sales |
| Perpetua | Not mentioned | From $695 a month |
Two things to check with any of them. First, how the fee scales. Per-product pricing hurts authors, because every format of every book is a separate product. A percentage of ad sales grows with list-price sales, not with the royalty you actually keep. Second, what the algorithm optimises. An ACOS target set without your royalty in mind will happily hold a book at an ACOS it can never afford.
Reporting and control: where AcosControl fits
AcosControl connects to your Amazon Ads account with your Amazon login and brings in up to 24 months of history. It shows ACOS for every campaign, keyword and search term across several periods side by side — the last 30 days next to last Christmas, next to lifetime. A search term that sells becomes an exact-match campaign in one click, and a Telegram message tells you when a keyword or campaign needs a look. It does not change bids on its own: nothing changes on your campaigns unless you change it. It covers Sponsored Products for eBooks, paperbacks and hardcovers, and has a free plan for harvesting search terms; the whole app (Pro) costs $49.99 a month on its launch sale (regular price $99) for every book and marketplace — plus 2% of monthly ad spend above $5,000, if you spend that much.
That is a different trade-off from a bid manager. You stay in control of every change and spend minutes instead of hours making it. If you want bids changed for you while you sleep, a bid manager is the better fit.
What you can do for free
- The Amazon Ads console itself: every campaign, bid and report, at no cost.
- The search term report: the best keyword research for a book that is already advertised.
- Amazon’s search box: its suggestions are real searches in use.
- A spreadsheet: perfectly workable for one or two books. The cost is your time, which grows with every book you add.
Which one you need, by stage
| Where you are | What is worth paying for |
|---|---|
| Before your first book | Nothing yet, or a research tool if you are choosing between niches |
| One or two books advertised | Usually nothing — the console and a spreadsheet will do |
| Several books, a weekly routine that takes hours | A reporting and control tool, or a bid manager |
| Large spend, no time at all | A bid manager or an agency — see agency vs software |
Common questions
What is the best Amazon ads tool for KDP authors?
It depends on the job. For research before publishing, Publisher Rocket, KDSpy and BookBeam are the common choices. For running ads on several books, you want something that connects to your ad account — a bid manager such as Ad Badger, or a reporting and control tool such as AcosControl.
Does Publisher Rocket manage Amazon ads?
No. Publisher Rocket is a research tool. Its Amazon Ads keyword generator builds keyword lists for you to add to your own campaigns, but it does not connect to your ad account or change bids. It costs $199 as a one-time payment.
Is Helium 10 good for KDP?
Helium 10 is built for Amazon sellers of physical products. Its ad automation, Helium 10 Ads, is included only on the Diamond plan with a 2% fee on ad spend, and its pricing page does not mention books or KDP, so ask before you pay.
Do I need software to run Amazon book ads?
Not for one or two books. The Amazon Ads console is free and enough to start. Software pays for itself once the weekly routine across several books takes longer than the subscription is worth to you.
What is a good alternative to Book Bolt or BookBeam for ads?
Neither manages ads. If what you need is ad management rather than research, compare tools that connect to your Amazon Ads account, such as Ad Badger or AcosControl.
- Sort tools by job: research, bid management, or reporting and control.
- Research tools (Publisher Rocket $199, KDSpy $79, BookBeam from $29/month) never touch your ads.
- Of the bid managers checked, only Ad Badger states KDP support; the rest are built for product sellers.
- Check how a fee scales: per-product pricing and a percentage of ad sales both work against authors.
- For one or two books, the free Amazon Ads console and your search term report are enough.