Behavioral reading analytics for authors

Turns any feedback into constructive feedback.

Beta readers almost always say "I loved it." Delta Reader tracks what they actually do while reading your manuscript, so you find out exactly where it loses interest, and where it wins it back.

"…and Marcus told himself, again, that the numbers would sort themselves out. The lie was the most honest thing about him, the way he built his whole week around not looking too closely…"

what readers said: "loved it, no notes" what readers did
Δ
chapter 1chapter 7 — the gap nobody mentionedchapter 14
Where it fits

Inside the stage where feedback is hardest to trust.

Every author moves through the same stages. Delta Reader sits at the point where it matters most.

01Finished draft
02Alpha reader
03Beta readers
Delta Reader
04Revise
05ARC reads
Delta Reader
06Launch
What we do

Reading, watched honestly.

Beta readers read the manuscript like any normal ebook, on their phone or laptop. In the background, Delta Reader tracks how they actually engage: where they slow down, where they speed up, which passages they highlight, where they quietly stop reading.

At natural points, readers also answer direct questions:

"Is this the book you thought you'd get?"
"How does the pacing feel right now?"
"Is the ending earned?"
What makes it different

Knowing what feedback to take is a skill.

Most authors get a pile of opinions with no way to tell which ones matter. We split it in two.

What readers did

Reading speed, drop-off points, highlights. Measured, not asked. Nobody can perform their way through a slow chapter.

What readers think

Anonymous enough to be honest. A reader who wouldn't say something to your face will say it here, and once several readers agree independently, it becomes a pattern worth trusting.

Ready to see what your readers actually do?

Send us a note about your manuscript and we'll walk you through it.