Book cover A/B testing for indie authors
Test two covers.Publish with evidence.
CoverSignal compares two finished book covers with controlled paid ads, then reports which one earned more clicks—or whether the result was too close to call.
Test my covers$179 per test · ad spend included · report within 72 hours
Illustrative report preview · sample data
How it works
From two finished covers to a measured result
Upload two covers
The one you love and the one your designer loves. Takes a minute.
We run real paid ads
Your $179 buys a live ad campaign in your genre. Both covers compete head to head for real clicks.
Keep the winner
Your report shows each cover's click-through rate and explains whether the difference produced a clear lead or an inconclusive result.
What you get
Facts, not feelings
Covers receivedtwo finished variants for the same book
Ads live on Metatargeted to your genre
Delivery measuredactual impressions and clicks recorded for each cover
Result evaluateda clear lead or an honest “too close to call”
Report in your inboxwithin the standard 72-hour service window
They'll never read the book if they don't like the cover.
The decision
You did the creative work. Now compare the finalists.
Start a test
Drop your covers in
FAQ
Fair questions
Where do the clicks come from?
We run short ad campaigns in front of readers browsing books in your genre. Every click is a real person choosing your cover over the scroll.
Where do the ads run?
On Meta, the same network authors already use to sell books. Your covers appear as normal book ads to readers who match your genre.
Do readers know they are in a test?
No. They see a normal book ad and click or keep scrolling, the same way they will on launch day. That is what keeps the numbers honest.
How long does a test take?
Most tests finish inside 72 hours. You get an email the moment a winner is clear.
How many people see the covers?
Delivery varies by genre, audience, and ad-auction conditions. Your report shows the actual impressions and clicks for each cover rather than promising a fixed sample size.
What do I get at the end?
Delivery, clicks, click-through rate for each cover, and whether the observed difference supports a clear lead or an inconclusive result.
What does it cost?
$179 per test, and all of the ad spend is included. No subscription, nothing else to buy.
What if neither cover wins?
A tie is an answer too: either cover can carry the book. You still get both clickthrough rates and how confident we are in the result.
I write under a pen name. Is that a problem?
Not at all. Readers only ever see the covers, and we never publish your results.
My book is not out yet. Can I still test?
Yes. Before launch is the best time, while the cover can still change.