Back the Amazon book ads that sell, cut the ones that waste money, and turn winning search terms into campaigns in one click — every period side by side.
Try it: click “View”, the settings cog or the Keywords tab. Illustrative data, not a real account.
Spend more on what sells. Stop paying for what doesn't. And stop spending evenings in downloaded reports to work out which is which.
Spend with no orders, found down to the placement. Winners across every period, ready for more budget.
Every period on one screen. No exports, no pivot tables, no matching placement reports by hand.
Search terms that already sold and aren't a keyword yet. One click to an exact-match campaign.
A Telegram message when a keyword or campaign needs a look. You decide what to change.
Put the last 30 days next to the same month last year, last Christmas and lifetime. Top performers, spenders, seasonal sellers and year-on-year changes stand out on their own, and you act on them from the same row.
| Period | Spend | Sales | Ord. | ACOS | 0 · · · · 50 · · · · 100% |
|---|---|---|---|---|---|
| 30 days | $149.50 | $747.50 | 39 | 20.0% | |
| Last year | $98.00 | $402.00 | 21 | 24.4% | |
| Xmas '25 | $212.00 | $1,180.00 | 62 | 18.0% | |
| Lifetime | $1,640.30 | $5,330.10 | 281 | 30.8% |
Under 25% in every recent period. A candidate for more budget.
| Period | Spend | Sales | Ord. | ACOS | 0 · · · · 50 · · · · 100% |
|---|---|---|---|---|---|
| 30 days | $188.00 | $226.30 | 14 | 83.1% | |
| Last year | — | — | — | — | not running |
| Xmas '25 | $96.40 | $47.97 | 3 | 201.0% | |
| Lifetime | $1,502.20 | $2,214.80 | 139 | 67.8% |
Over 60% in every period it has run. Cut bids or pause.
| Period | Spend | Sales | Ord. | ACOS | 0 · · · · 50 · · · · 100% |
|---|---|---|---|---|---|
| 30 days | $12.10 | $0.00 | 0 | — | no sales |
| Last year | $9.80 | $15.99 | 1 | 61.3% | |
| Xmas '25 | $420.00 | $2,310.00 | 178 | 18.2% | |
| Lifetime | $980.00 | $3,940.00 | 303 | 24.9% |
Sells in November and December. Raise it in October, rest it the other months.
| Period | Spend | Sales | Ord. | ACOS | 0 · · · · 50 · · · · 100% |
|---|---|---|---|---|---|
| 30 days | $265.80 | $886.00 | 59 | 30.0% | |
| Last year | $301.00 | $602.00 | 40 | 50.0% | |
| Xmas '25 | $150.00 | $520.00 | 35 | 28.8% | |
| Lifetime | $2,870.00 | $6,410.70 | 428 | 44.8% |
50% → 30% on the same 30 days. What changed is working.
Illustrative data. Pick any periods you like, up to ten, for every campaign and every keyword. Xmas '25 bar capped at 100%; actual ACOS 201.0%.
Each keyword carries its periods, its placements and its actions on one row. Nothing to download, nothing to match up.
Shoppers find your books with words you never bid on. The ones that already made orders, and aren't a keyword yet, are pulled out for you. Terms that only spend are listed separately, ready to negate.
Every search that sold a book but isn't a keyword yet, lifted out of your Amazon reports and ready to bid on. Free to start, no card needed.
Searches that already sold through broad, phrase or auto targeting, with no exact keyword of their own. Lowest ACOS first.
No downloading, filtering or pivot tables. Your search-term reports arrive on their own, with up to 24 months of history.
＋ Campaign builds an exact-match campaign for the same book, with the bid set from what the term really cost. You check it first.
A term is listed only after it has made orders, 2 or more by default. Your budget goes to words shoppers already buy with, not guesses.
Most ad problems are silent. A bid change quietly doubles your ACOS. A search term starts eating budget on a Friday and you notice on Monday. You get a message when one of them happens — and you decide what to do.
| Alert | Fires when | Why it matters |
|---|---|---|
| ACOS over your limit | A keyword's ACOS passes your threshold once it has spent your minimum | Catch it the same day, before it eats a week of profit. |
| Spend, no orders | A keyword passes your spend floor with zero orders in the window | Money leaving every day for nothing — stop it the moment you know. |
| Budget running out | A campaign has used the share of its daily budget you set, 80% for example | Running out of budget on a campaign means your conversions stop. |
Sent to your own Telegram chat. You set the thresholds — ACOS percentage, minimum spend, how often it may repeat — and nothing is sent until you turn it on.
Nothing arrives unless something is wrong. Most days you hear nothing.
The whole of AcosControl fits in your pocket. Check a campaign in the queue at the shop, back a keyword that is selling, or cut one that is not — without waiting to get back to your desk.
The whole of AcosControl fits in your pocket. Check a campaign in the queue at the shop, back a keyword that is selling, or cut one that is not — without waiting to get back to your desk.
No setup call. No onboarding. No data to prepare.
The same account that runs your ads. Your data connects in the same step, with nothing to copy or paste.
Recent days first, the full history within a few hours. Then it stays up to date on its own.
Reports older than 24 months that you exported from the Amazon console: drop the files in.
And keep it forever. Last Christmas, the same month last year and lifetime are there from the first day, so the periods above work the moment you connect.
Checked against each vendor's own published documentation, September 2026. Bars drawn to scale against 24 months. If any of this is out of date, tell us and we will correct it.
What changes once a selling term, a placement and last year are on the same row. Examples of the work, not customers.
“A search term had already made orders and was not a keyword yet. It was just sitting in the list. One click turned it into its own exact campaign, bid set from what that term had actually cost. That used to be a Sunday in a spreadsheet.”
“I had been cutting the keyword. The waste was the placement. Product pages had spent with no orders, and rest of search on the same keyword was fine — both on that keyword's own row, not in a second report I had to match by hand.”
“By the evening the older months were in, so I could put this September next to last September instead of guessing. I still change the bids myself. I wish the first screen were a little calmer. I open it every morning anyway.”
No seats, no per-marketplace add-ons. Move up or down any time.
See what to harvest, on us.
Every search term worth a campaign, every month.
Run all your Amazon ads from one place.
Your data is never pooled, aggregated, benchmarked or shown to other customers. And nothing on your campaigns changes unless you change it.
Stored encrypted. Decrypted only on the server, only to fetch your reports. They never reach the browser.
Every request is checked against your Amazon login on our server and reads only the ad accounts you are allowed to see. The database is never reachable from the internet.
It lives in your own account. Export your campaign, keyword and research tables as CSV whenever you like.
Read the details: Privacy Policy · Security & incident response · Login with Amazon notice
No. You sign in with Amazon directly, and Amazon tells us only that it is you and which ad accounts you may see. We never see your password, and you can revoke access from your Amazon account at any time.
Your history stays in your account. Nothing is deleted when a subscription ends, and if you come back the gap is filled in automatically as far as the Amazon API still reaches.
No. Nothing is changed unless you change it. Recommendations are shown with the evidence behind them and stay recommendations. And if a change doesn't work out, Master Undo puts bids, budgets, placements and on/off back the way they were on the day you joined, at a saved restore point or on a date you pick, with a preview before anything is sent.
Yes. If your Amazon account has access to their ad account, you get access to that data automatically. Each person pays their own subscription.
It is part of the Pro plan and only applies if you spend more than $5,000 a month on ads: 2% of the spend above $5,000. Spend $8,000 and you pay $49.99 + $60. Below $5,000, $49.99 is all you pay. Free and Harvest have no ad-spend fee.
US, UK, Canada, Germany, France, Italy, Spain, Netherlands, Mexico, Australia and India — all in one account, on every plan.
From your settings, any time. You keep access until the end of the period you paid for, and your history stays in your account.
ACOS (advertising cost of sales) is your ad spend divided by the sales those ads brought in, as a percentage. Spend $30 to make $100 in ad sales and your ACOS is 30%. For a book, the ACOS you can afford depends on your royalty: above your break-even ACOS, every ad sale loses money unless read-through makes it back.
Yes. Your Sponsored Products campaigns appear whatever format they advertise — Kindle eBook, paperback or hardcover — with every keyword, search term and placement.
Software. You see your Amazon PPC data for every period side by side and make the changes yourself — bids, placements, pauses, negatives and new campaigns from search terms. No agency, and nothing changes unless you change it.
Harvest the search terms that already sell, free. Move up for every search term, or for the whole app. No seats and no per-marketplace add-ons: all 11 marketplaces on every plan.
Free plan: no card needed Moving down keeps the month you paid for Cancel any time from settingsSee what to harvest, on us.
Every search term worth a campaign, every month.
Run all your Amazon ads from one place.
Free and Harvest have no ad-spend fee. On Pro, most authors pay $49.99 and nothing more: the 2% starts only once your ads spend more than $5,000 in a month, and only on the part above it.
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Plenty of ad software prices by plan level, spend band, seat or marketplace, so the bill grows with you. Our three plans differ by what you can do, never by how big your account is.
“Typical tiered pricing” describes common pricing models in general, not any particular tool.
Free costs nothing and needs no card. Harvest and Pro start when you choose them, you see your own data from the first hour, and leaving is a setting, not a phone call.
We never see your password. Your campaigns start arriving straight away: recent days first, then up to 24 months within a few hours.
No card and no charge. Harvest the search terms that sell your books, and nothing on your campaigns changes unless you change it.
Harvest is $19.99 a month. Pro is $49.99 a month on the launch sale (regular price $99), plus 2% of ad spend above $5,000 if you spend that much. Billing starts the day you choose.
You keep access until the end of the period you paid for. Your history stays in your account.
Coming back later? Nothing was deleted, and the gap is filled in automatically as far as the Amazon API still reaches.
It only applies if you spend more than $5,000 a month on ads: 2% of the spend above $5,000. Spend $8,000 and you pay $49.99 + $60. Below $5,000, $49.99 is all you pay. Free and Harvest have no ad-spend fee.
Every month, the 100 search terms that sold (2+ orders) but are not yet keywords in your campaigns, lowest ACOS first, with Last 30 days, 90 days and all time side by side. You can add 20 of them in total with one click: ＋ Campaign or ＋ Add to a campaign. No card needed. More about Free Harvest.
Yes, any time from your settings. Moving up to a bigger plan changes it straight away: you pay for the new plan from today, less the unused part of your current month. Moving down keeps your current plan until the end of the month you have paid for, then switches, with nothing credited or refunded. Moving to Free cancels your paid plan at the end of the period you have paid for.
From your settings, any time. You keep access until the end of the period you paid for, and your history stays in your account.
Your history stays in your account. Nothing is deleted when a subscription ends, and if you come back the gap is filled in automatically as far as the Amazon API still reaches.
US, UK, Canada, Germany, France, Italy, Spain, Netherlands, Mexico, Australia and India — all in one account, on every plan.
Yes. If your Amazon account has access to their ad account, you get access to that data automatically. Each person pays their own subscription.
Yes. Your Sponsored Products campaigns appear whatever format they advertise — Kindle eBook, paperback or hardcover — with every keyword, search term and placement.
No. You sign in with Amazon directly, and Amazon tells us only that it is you and which ad accounts you may see. We never see your password, and you can revoke access from your Amazon account at any time.
Software. You see your Amazon PPC data for every period side by side and make the changes yourself — bids, placements, pauses, negatives and new campaigns from search terms. No agency, and nothing changes unless you change it.
Check an ACOS, find the highest ACOS a book can afford, and work out a starting bid. Free to use, and every answer shows its working.
Type a period's ad spend, ad sales and ad orders from the Amazon Ads console, and the book's total sales for the same period. Every result updates as you type.
Your royalty sets the ceiling for everything else. Work out the break-even ACOS first, then turn it into a bid you can defend.
The highest ACOS a book can run before each ad sale loses money.
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A starting bid from your book's price, royalty and conversion rate.
Your target ACOS is above this book's break-even ACOS, so the target bid is higher than a click is worth.
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Plain-English guides to the numbers behind book ads: what they mean, and what to do about them.
These cards are layout placeholders. Titles, summaries and read times are to be written; none of these articles exists yet.
What the number means, how to work it out, and how to tell whether the ACOS on your book is making you money or quietly costing you.
If you run Amazon ads for a book, ACOS is the number the console puts in front of you most often. It is also the one that is easiest to misread. A 40% ACOS can be a healthy profit on one book and a steady loss on another. This guide explains what ACOS measures, how to calculate it, and how to decide what a good ACOS is for your own titles.
ACOS stands for advertising cost of sales. It tells you how much you spent on ads for every dollar of sales those ads brought in, written as a percentage. Amazon calculates it for every campaign, ad group, keyword and search term, for whatever date range you pick.
Lower means the ads are cheaper relative to the sales they produce. Higher means you are paying more to make each sale. On its own, though, the number says nothing about profit. For that, you need to compare it with what you actually earn from a sale, which is where break-even ACOS comes in.
ACOS = ad spend ÷ ad sales × 100
Both numbers come from the same period and the same campaign, keyword or search term. "Ad sales" is what buyers paid for the book, not your royalty.
Say a campaign spent $30 last month and Amazon attributes $100 of book sales to it. Divide the spend by the sales and multiply by 100:
| Ad spend | Ad sales | Sum | ACOS |
|---|---|---|---|
| $30.00 | $100.00 | 30 ÷ 100 × 100 | 30% |
| $45.00 | $60.00 | 45 ÷ 60 × 100 | 75% |
| $12.00 | $0.00 | no sales | — |
The last row matters as much as the first. When a keyword spends money and sells nothing, there is no ACOS to show, and the console often displays a dash. That spend is still real, and it is usually the first thing worth cutting.
Two related numbers turn up next to ACOS. They use the same inputs, arranged differently:
| Metric | Formula | $30 spend, $100 ad sales, $250 total sales | Read it as |
|---|---|---|---|
| ACOS | spend ÷ ad sales | 30% | Cost of the sales the ads made |
| TACOS | spend ÷ total sales | 12% | Ad cost against every sale of the book, organic included |
| ROAS | ad sales ÷ spend | 3.33 | Sales per $1 of ads; the inverse of ACOS |
ACOS is the one to act on keyword by keyword. TACOS is useful for seeing whether advertising is lifting a book's overall sales or just buying the same sales you would have made anyway.
Your break-even ACOS is the highest ACOS at which an ad sale still pays for itself. It equals your royalty per copy divided by the list price, as a percentage. Below it, the ads make money on each sale. Above it, every ad sale costs more than it earns.
royalty per copy ÷ list price × 100
A $9.99 eBook on the 70% royalty option earns roughly $6.99 a copy, so its break-even ACOS is about 70%. The real figure is a little lower, because KDP deducts a delivery cost based on file size from 70% royalties. Use the royalty KDP shows you for your book rather than the headline rate.
Paperback royalties are usually worked out as the list price times 60%, minus the printing cost. A $12.99 paperback with a $3.50 printing cost earns about $7.79 − $3.50 = $4.29, so its break-even ACOS is 4.29 ÷ 12.99 ≈ 33%. The same ACOS of 40% that is comfortably profitable on the eBook loses money on this paperback.
Rates and printing costs differ by format, marketplace and page count, so check the rate KDP shows you for each book before you set a target.
Free toolBreak-even ACOS for KDPPick the format and royalty, enter your price, get the line your ACOS should stay under.There is no single good ACOS. A good ACOS is one comfortably below your break-even for that book. For a 70% eBook that might leave plenty of room; for a low-priced paperback the room is much smaller.
Series change the picture. If the first book leads readers on to the rest, an ad sale is worth more than its own royalty. Some authors deliberately run the first book above break-even because read-through makes the money back. That is a reasonable choice when you know your read-through, and a costly one when you are guessing. Kindle Unlimited page reads are reported separately from ad sales, so a KU book's ACOS on its own can understate what its ads earn.
A single ACOS for a single date range hides a lot. A keyword can look expensive over 30 days and excellent over its lifetime, or the other way round. Seasonal books look terrible in summer and perfect in December.
AcosControl puts up to ten periods side by side on every campaign and keyword, so today, the last 30 days, the same month last year, last Christmas and lifetime sit on one row. The pattern is visible before you change a bid. Try the live demo to see how it looks.
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