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SKILL.md
npx skills add inference-sh/skills --skill app-store-screenshots
App Store and Google Play screenshot creation with exact platform specs. Covers iOS/Android dimensions, gallery ordering, device mockups, and preview videos. Use for: app store optimization, ASO, app screenshots, app preview, play store listing. Triggers: app store screenshots, aso, app store optimization, play store screenshots, app preview, app listing, ios screenshots, android screenshots, app store images, app mockup, device mockup, app gallery, store listing
npx skills add inference-sh/skills --skill app-store-screenshots
Install the belt CLI skill:
npx skills add belt-sh/cli
Create app store screenshots and preview videos via inference.sh CLI.
Requires inference.sh CLI (
belt). Install instructions
| Device | Dimensions (px) | Required |
|---|---|---|
| iPhone 6.7" (15 Pro Max) | 1290 x 2796 | Required |
| iPhone 6.5" (11 Pro Max) | 1284 x 2778 | Required |
| iPhone 5.5" (8 Plus) | 1242 x 2208 | Optional |
| iPad Pro 12.9" (6th gen) | 2048 x 2732 | If iPad app |
| iPad Pro 11" | 1668 x 2388 | If iPad app |
| Spec | Value |
|---|---|
| Min dimensions | 320 px (any side) |
| Max dimensions | 3840 px (any side) |
| Aspect ratio | 16:9 or 9:16 |
| Max screenshots | 8 per device type |
| Formats | PNG or JPEG (24-bit, no alpha) |
80% of App Store impressions show only the first 3 screenshots (before the user scrolls). These three must:
| Position | Content | Purpose |
|---|---|---|
| 1 | Hero — core value, best feature | Stop the scroll, communicate what the app does |
| 2 | Key differentiator | What makes you unique vs competitors |
| 3 | Most popular feature | The thing users love most |
| 4 | Social proof or outcome | Ratings, results, testimonials |
| 5-8 | Additional features | Supporting features, settings, integrations |
| 9-10 | Edge cases | Specialized features for niche users |
The standard: device mockup showing the app, caption text above/below.
The app UI fills the entire screenshot. Works for immersive apps.
The device shown in a real-world context (person holding phone, on desk, etc.).
UI screenshot with arrows/circles pointing to specific features.
| Spec | Value |
|---|---|
| Duration | 15-30 seconds |
| Orientation | Portrait or landscape (match app) |
| Audio | Optional (loops silently in store) |
| Format | H.264, .mov or .mp4 |
| Spec | Value |
|---|---|
| Source | YouTube URL |
| Duration | 30s-2min recommended |
| Orientation | Landscape preferred |
| Segment | Duration | Content |
|---|---|---|
| Hook | 0-3s | Show the core outcome/wow moment |
| Feature 1 | 3-10s | Demonstrate top feature in action |
| Feature 2 | 10-18s | Second key feature |
| Feature 3 | 18-25s | Third feature or social proof |
| CTA | 25-30s | End screen with app icon |
Each language gets its own set of screenshots. Priorities:
| Market | Localization Level |
|---|---|
| Primary markets | Full: new screenshots + translated captions |
| Secondary markets | Translated captions, same screenshots |
| Other | English defaults |
Key localization markets: English, Japanese, Korean, Chinese (Simplified), German, French, Spanish, Portuguese (Brazilian)
Google Play Console supports store listing experiments:
| Mistake | Problem | Fix |
|---|---|---|
| Settings screen as screenshot | Nobody cares about settings | Show core value, not infrastructure |
| Onboarding flow screenshots | Shows friction, not value | Show the app in-use state |
| Too much text | Unreadable in store | Max 2 lines, 30pt+ font |
| Wrong dimensions | Rejected by store | Use exact platform specs |
| All screenshots look the same | No reason to scroll | Vary composition and content |
| Feature-focused captions | Doesn't communicate benefit | "Never Miss a Deadline" > "Push Notifications" |
| Outdated UI | Looks abandoned | Update screenshots with each major release |
| No hero screenshot | Weak first impression | Position 1 = your best shot |
Browse all apps: belt app list