Retaincast reads your cut like a restless viewer, predicts where people quit and why, and hands you the five timestamped edits that matter most — then scores its own prediction against the real curve YouTube reports.
Free tier included · no credit card · one invite email, nothing else.
Each zone is a predicted drop. Tap one to see why viewers leave — and the edit that fixes it.
Drop a cut or paste a link to see what an analysis looks like. Demo: your file is read on your device and never uploaded — the result shown is the example analysis from EP 12.
This is the example from EP 12 — "The Claw Always Wins", not an analysis of your file.
A predicted curve plus the top 5 edits for your own cuts, on the Free tier. Free tier included · no credit card · one invite email, nothing else.
One invite email to when your access is ready — nothing else.
Every pass through the loop makes the next prediction sharper, because the misses are measured, not forgotten.
Retaincast watches the hook frame by frame and measures cut rhythm, dead air and loudness, then scores it all against what keeps viewers watching. You get a predicted curve with a reason for every drop, and the five timestamped edits that matter most — while changes are still cheap.
One upload goes to YouTube, TikTok and Instagram Reels from your own dashboard — scheduled or on demand, no tab-juggling.
Every night Retaincast pulls views, watch time and the full audience-retention curve for each published video. No CSV exports, ever.
Predicted and actual curves are compared point by point. Every miss becomes a note about your audience — "your viewers drop at logo stings; predictions ran 5 points optimistic" — that corrects every future analysis.
Made by the same engine that drafts your Shorts.
Measured signals, scored against what makes people stay.
Every frame of your opening, checked: does the first image, text and sound make a promise worth staying for?
Shot lengths, silence spans and loudness — everything a viewer feels as pace. Dead-air cuts export straight to your editor.
Where the video re-earns attention, and where it coasts long enough to lose it.
The same analyst reads short-form scripts, screenplays, TV pilots and books — fixing engagement at the cheapest possible stage.
Every other tool reads your audience retention after you publish — after the video has already spent its first-48-hours push. Retaincast works before, then logs every prediction and scores it against the curve YouTube reports: in the open, per video, in points.
The longer you use it, the harder it is to replace: that track record is yours, built from your audience.
Retaincast is the only one working before you publish — and grading itself after.
| Question | vidIQ | TubeBuddy | YouTube Studio | Retaincast |
|---|---|---|---|---|
| When it reads your video | After you publish | After you publish | After you publish | Before you publish |
| Grades its own predictions | No | No | No | Yes — per video, in points |
| What it analyzes | What already happened | What already happened | What already happened | Your cut, while the fix is one edit |
| Price | $19–49/mo | $12–27/mo | Included with YouTube | Free tier; $19 or $49/mo |
Join from the waitlist and your price is locked for life.
Prove it on your own videos
The full loop, every upload
Series, teams and long scripts
For reference: vidIQ runs $19–49/mo and TubeBuddy $12–27/mo for after-the-fact analytics. Retaincast is the only one working before you publish — and grading itself after.
Retaincast measures what drives retention — the hook frame by frame, cut rhythm, dead air, loudness, the transcript — and scores it against what keeps viewers watching, producing a predicted curve with a reason for every drop. Then it checks itself: once the video is live, the real YouTube retention graph is compared point by point. After your first few scored videos, predictions typically land within 10 points, and keep improving.
They analyze what already happened. By the time the retention graph appears in YouTube Studio, the algorithm has judged your video. Retaincast moves the same analysis to before you publish, while the fix costs one edit instead of one video.
Not a score — a work order: the five timestamped edits that matter most, dead-air cuts exported straight to Resolve, Premiere or Final Cut, and burned-in captions for muted feed viewers.
Yes. The same engine reads short-form scripts, video scripts, screenplays, TV pilots and manuscripts — predicting where readers or viewers quit, before anything is shot or typeset.
Free tier included · no credit card · one invite email, nothing else.