JantonioFC App Store Screenshots
When to Use
Use this skill as needed to perform the specified automation task.
Create app store screenshots and preview videos via inference.sh CLI.
Quick Start
curl -fsSL https://cli.inference.sh | sh && infsh login
# Generate a device mockup scene
infsh app run falai/flux-dev-lora --input '{
"prompt": "iPhone 15 Pro showing a clean modern app interface with analytics dashboard, floating at slight angle, soft gradient background, professional product photography, subtle shadow, marketing mockup style",
"width": 1024,
"height": 1536
}'
Platform Specifications
Apple App Store (iOS)
| 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 |
- Up to 10 screenshots per localization
- First 3 screenshots are visible without scrolling (critical)
- Formats: PNG or JPEG (no alpha/transparency for JPEG)
Google Play Store (Android)
| 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) |
- Feature graphic: 1024 x 500 px (required for featuring)
- Promo video: YouTube URL (optional but recommended)
The First 3 Rule
80% of App Store impressions show only the first 3 screenshots (before the user scrolls). These three must:
- Communicate the core value proposition
- Show the best feature/outcome
- Differentiate from competitors
Screenshot Gallery Order
| 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 |
Screenshot Styles
1. Device Frame with Caption
The standard: device mockup showing the app, caption text above/below.
┌──────────────────────────┐
│ "Track Your Habits │ ← Caption (benefit-focused)
│ Effortlessly" │
│ │
│ ┌──────────────────┐ │
│ │ │ │
│ │ App Screen │ │ ← Actual app UI in device frame
│ │ Content │ │
│ │ │ │
│ │ │ │
│ └──────────────────┘ │
│ │
└──────────────────────────┘
2. Full-Bleed UI (No Device Frame)
The app UI fills the entire screenshot. Works for immersive apps.
3. Lifestyle Context
The device shown in a real-world context (person holding phone, on desk, etc.).
4. Feature Highlight with Callouts
UI screenshot with arrows/circles pointing to specific features.
Caption Writing
Rules
- Max 2 lines of text
- Benefit-focused, not feature-focused
- 30pt+ equivalent font size (must be readable in store)
Examples
❌ Feature-focused:
"Push Notification System"
"Calendar View with Filters"
"Data Export Functionality"
✅ Benefit-focused:
"Never Miss a Deadline Again"
"See Your Week at a Glance"
"Share Reports in One Tap"
Generating Screenshots
Hero Screenshot (Position 1)
# Clean device mockup with hero feature
infsh app run falai/flux-dev-lora --input '{
"prompt": "modern iPhone showing a beautiful fitness tracking app with activity rings and workout summary, device floating at slight angle against soft purple gradient background, professional product shot, clean minimal composition, subtle reflection",
"width": 1024,
"height": 1536
}'
Feature Highlight
# Feature callout style
infsh app run bytedance/seedream-4-5 --input '{
"prompt": "app store screenshot style, iPhone showing a messaging app with AI writing suggestions highlighted, clean white background, subtle UI callout arrows, professional marketing asset, modern design",
"size": "2K"
}'
Lifestyle Context
# Device in real-world setting
infsh app run falai/flux-dev-lora --input '{
"prompt": "person holding iPhone showing a cooking recipe app, kitchen background with ingredients, warm natural lighting, over-the-shoulder perspective, lifestyle photography, authentic feeling",
"width": 1024,
"height": 1536
}'
Before/After
# Split comparison
infsh app run infsh/stitch-images --input '{
"images": ["before-screenshot.png", "after-screenshot.png"],
"direction": "horizontal"
}'
Preview Videos
Apple App Store
| Spec | Value |
|---|---|
| Duration | 15-30 seconds |
| Orientation | Portrait or landscape (match app) |
| Audio | Optional (loops silently in store) |
| Format | H.264, .mov or .mp4 |
Google Play
| Spec | Value |
|---|---|
| Source | YouTube URL |
| Duration | 30s-2min recommended |
| Orientation | Landscape preferred |
Preview Video Structure
| 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 |
# Generate preview video scenes
infsh app run google/veo-3-1-fast --input '{
"prompt": "smooth screen recording style, finger tapping on a modern mobile app interface, swiping between screens showing charts and data visualizations, clean UI transitions, professional app demo"
}'
Localization
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)
A/B Testing (Google Play)
Google Play Console supports store listing experiments:
- Test different screenshot orders
- Test with/without device frames
- Test different captions
- Test different color schemes
- Run for 7+ days with 50%+ traffic for significant results
Common Mistakes
| 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 |
Checklist
- Correct dimensions for target platform
- First 3 screenshots communicate core value
- Captions are benefit-focused, max 2 lines
- No onboarding or settings screens
- Preview video is 15-30s with hook in first 3s
- Localized for top markets
- Feature graphic (1024x500) for Google Play
- Screenshots updated for current app version
- A/B test variant prepared
Related Skills
npx skills add inference-sh/skills@ai-image-generation
npx skills add inference-sh/skills@ai-video-generation
npx skills add inference-sh/skills@image-upscaling
npx skills add inference-sh/skills@prompt-engineering
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