Will it survive
the scroll?
Drop a short clip and, in about a minute, see its Hook, Hold Rate, a second-by-second attention curve, and a real attention heatmap — so you fix the weak seconds before you post, not after.
Illustrative visual-attention model — not a medical reading.
Three steps. About a minute.
Drop your clip
Upload a vertical or horizontal video, 15 seconds or less. It goes straight to private storage — and is deleted right after.
We read the signal
The engine watches every frame — where the eye lands, the cuts, the motion, the sound — the things that actually decide whether a thumb keeps scrolling.
Fix the weak seconds
Get your scores, the attention curve, a heatmap, and a plain-English fix list. Re-cut, re-scan, ship the stronger version.
Every score traces to a real signal
No random numbers in a neuroscience costume. Each metric is computed from your actual footage.
Virality Index
An overall 0–100 read on creative strength, blended from every signal below.
Signal · Composite — labeled honestly, not a guaranteed view count.
Hook Strength
How hard the first second grabs — and the exact moment your strongest beat lands.
Signal · Early saliency, audio onset, motion & cut density.
Hold Rate
Predicted retention — do they stay, or thumb away through the middle?
Signal · Retention model over the attention curve.
Attention Curve
A second-by-second line of where focus rises and drifts across the whole clip.
Signal · Fused per-frame saliency + motion + audio energy.
Sound & Pacing
Whether your audio and cut rhythm pull attention or let it sag.
Signal · RMS, onset, silence ratio, cut cadence.
Attention Heatmap
A visual map of where the eye is pulled on each key frame — your thumb-stop zones.
Signal · Real visual-saliency map. Illustrative, not medical.
Built like a real instrument — not a guess
The honest version of a virality predictor. Here's exactly why the score means something.
Real signal, not a slot machine
Every number is computed from your footage — visual saliency, motion, cuts, audio, faces. We never dress a random number in neuroscience.
We show our work
The big tools hide their price and their method behind a sales call. Our methodology is public, and we publish our accuracy — including where it's weak.
Your footage stays yours
Clips are deleted right after analysis. We never train on your content and never run face recognition. Privacy is the default, not an upsell.
Lock in founding-member pricing
We're in early access. Founding members keep $19 Creator / $49 Pro for as long as they stay — before public pricing goes up. Your rate never rises.
Start free. Scale when it pays.
1 scan = 1 credit. Cancel anytime.
Free
Feel the wow. No card needed.
3 scans / month
- 3 scans / month
- Hook, Hold & Attention scores
- Brain-style attention heatmap
- 7-day history
- Watermarked share card
Creator
For solo short-form creators shipping daily.
50 scans / month
- 50 scans / month
- Everything in Free
- No watermark
- Full history
- Plain-English fix list
Pro
For power creators, UGC freelancers & small teams.
200 scans / month
- 200 scans / month
- Everything in Creator
- A/B compare two cuts
- JSON export
- Priority processing
Team & API plans coming soon · prices in USD · billed by KAK Digital LLC via Stripe.
Straight answers
Does a high score mean I'll go viral?
No — and we'll never claim that. Virality also depends on your account, timing, and the algorithm. Scrollproof predicts creative strength: how well the clip is built to stop the scroll and hold attention. It's a diagnostic to fix weak seconds before you post.
What's the attention heatmap?
A real visual-saliency map computed from your frames — it estimates where a viewer's eye is pulled. It's an illustrative attention model, not a medical or neurological reading.
What happens to my video?
It uploads to secure private storage, gets analyzed, and is auto-deleted shortly after. We never use your content to train anything, and we don't run face recognition.
How long can a clip be?
Up to about 15 seconds works best — that's the short-form sweet spot the engine is tuned for.
Make every clip thumb-stopping.
Three free scans, no card. See what the scroll sees — then ship the stronger cut.
Scan a clip free