TrustACOS
Amazon tells you your ACOS. We tell you whether the campaign made money.
TrustACOS counts Kindle Unlimited page-reads, series read-through, and conservative assumptions, then gives every campaign a clear action: scale, hold, fix, or pause.
Your KDP and Ads reports stay private to your account. We never touch your Amazon login.
One blended number from sales only. Looks healthy, so you keep spending.
Count KU page-reads and series read-through and the picture flips. We show the gap and what to do about it.
From report to decision in 60 seconds
No spreadsheets, no Amazon login, no guesswork.
Upload your reports
Drop in your Amazon Ads and KDP reports. We auto-detect the columns for you.
See the truth
We fold in KU page-reads and read-through to compute the real profit of every campaign.
Know what to do
Each campaign gets a verdict: scale, hold, fix, or pause, sorted by money lost.
Everything you need to spend with confidence
True ACOS
Ad spend against your real earnings, not Amazon's sales-only number.
Break-even ACOS
The exact ACOS each book or series can run at and still profit. Often above 100%.
KU + read-through
Page-read royalties and the later books in your series, finally counted.
Action queue
Scale, hold, fix, pause, and negative-keyword work ranked by leakage and upside.
Show the math
Every number opens up, with sliders to stress-test your assumptions live.
Private by default
Your reports stay in your account. We never post or connect to Amazon.
Not another broad author dashboard
Use your research tools to find targets. Use TrustACOS to decide whether the spend made money.
After the click
Publisher Rocket, KDSPY, and Kindletrends help find ideas and targets. TrustACOS judges the campaigns after real spend.
One hard question
Did this Amazon Ads campaign actually profit once KU and read-through are counted?
Profit Room
A paid audit layer turns the app into a monthly operating system for Amazon Ads decisions.
Less than one mis-spent ad day
Start free. Upgrade when it pays for itself, which is usually the first report.
or $137/yr · save 40%
For the working indie author.
- Unlimited books & series
- Full history
- Saved assumptions
- Monthly profit PDF
or $281/yr · save 40%
For scaling ad-spenders.
- Everything in Author
- Alerts on losing campaigns
- Bid & negative-keyword help
- Multi pen-name
Billed by Gumroad. Annual plans save 40%.
The honest answers
How can break-even ACOS be over 100%?+
Because one reader of book 1 can be worth more than its cover price once you add KU page-reads and the next books in the series. So an 80% ACOS campaign can still be profitable.
Does Amazon attribute KU reads to a campaign?+
No, and that is the whole problem. We estimate the KU contribution from your KDP data and conservative, editable assumptions, and we label every estimate clearly.
Do I have to connect my Amazon account?+
No. You upload the same reports you already download from Amazon Ads and KDP. Nothing connects to your Amazon login.
Who is this for?+
Indie authors who run Amazon Ads, are enrolled in Kindle Unlimited, and write in series. That is where Amazon's ACOS misleads you most.
Stop trusting a number that ignores half your income.
Upload one month of reports and see your real profit in under a minute.