App Screens on a Rail — effect skill for grids & carousels

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Two to five app screens ride a horizontal rail: one centered and sharp, neighbors smaller and receded.

What it does

Built on Screen Flow Carousel by HeyGen (HyperFrames), Apache-2.0. The write-up and recipes below are varg's.

Phone-sized screens in a row; the rail slides with momentum and snaps the next screen to center with a small overshoot.

When: Walk through an app flow (onboarding → home → detail) without device frames.

Watch out: Do not let side screens compete; scale them to ~80% and dim them 30–40%.

Timing: Slide 0.5–0.7 s with snap overshoot (back.out 1.2); 1.5–2.5 s per screen.

Also called: screen carousel, app screens, screen flow

In HyperFrames

npx hyperframes add screen-flow-carousel

Or velocity-throw-snap for a fast whip to the chosen screen.

In Remotion

const idx = interpolate(frame,[0,60,120],[0,1,2],{extrapolateRight:'clamp'});
screens.map((s,i)=>{const d=i-idx; return <Img src={s} style={{transform:`translateX(${d*420}px) scale(${1-Math.min(Math.abs(d),1)*0.2})`, opacity:1-Math.min(Math.abs(d),1)*0.35}}/>})

In CapCut

Place screens in a row as one long image; keyframe Position X with snaps; add a blur mask on the sides.

Ready-made components

Where this comes from

Use when

Not for

Install

Example output

https://s3.varg.ai/how-to/previews/d5bef41402a8/take-app-screens-on-rail.mp4 — The Screen Flow Carousel component rendered as installed (npx hyperframes add screen-flow-carousel), defaults only (credit: Rendered by varg · HyperFrames Screen Flow Carousel, https://hyperframes.heygen.com/catalog/components/screen-flow-carousel)

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