A brain scan, without the scanner.
Check a short video before you post it. PrePost predicts which second an average viewer's brain locks in and which second it drifts off, and tells you why in plain English.
The iPhone app is in development. You can explore a full sample read in your browser today.
Real TRIBE v2 predictionI predict an average viewer's attention is lowest at 0:01 and peaks at 0:14.
What you get in every read
Specific seconds, named brain areas and a note on what to change.
Second by second
A timeline of the predicted response for every second of your clip, so you can point at the exact moment that slips.
Seven brain areas
See whether a moment works because of the visuals, the voice, the people on screen or the story.
AttentionSocial: reading peopleLanguageValue: "is this worth it?"SoundMotionStoryRevision tips in plain English
Each read comes with notes on what to change and where, written the way you would say it on set.
Ask about any clip
Chat with the read. Ask what happens in the first three seconds and get an answer grounded in the model’s numbers.
From the file alone
No test panel, no eye-tracker, no scanner. Upload the video and the model does the rest in a few minutes.
Honest by design
Every read is labeled a prediction for an average viewer. Our own pilot result is published too, including where it fell short.
Built for both sides of the draft
For creators
Check a draft before you send it
Find the second that loses a viewer while you can still fix it, then send a cut you can stand behind.
- Built for one person on a phone
- A read on the whole clip, not just the first three seconds
- Plain-English notes you can act on
For agencies and brands
Review drafts with a reason
Approve a draft or send it back with something specific: “attention dips at 0:04, tighten the open.”
- Reads you can drop into the review and the client deck
- The same read for every creator on the campaign
- Works in the browser at your desk
How it works
- 01
Add a draft
Upload a short video from your camera roll or your desktop.
- 02
Get the read
In a few minutes, see the predicted response second by second across seven brain areas.
- 03
Fix the second that slips
Use the tips and the chat to tighten the cut before it posts.
PrePost predicts an average brain, not your audience, and it doesn't predict views. Whether the read tracks engagement isn't proven yet: in our first 24-video pilot the link was weak and could have been chance (r = 0.25, p = 0.24). A larger pre-registered test is under way.
See what lands before you post
Early access opens to agency and brand teams first.