App Store & Google Play Screenshots Generator

A skill for AI coding agents that scaffolds a production-ready Next.js editor for App Store and Google Play marketing screenshots. It gives you a connected canvas, real device frames, inspector controls, persistent project state, and one-click export bundles at store-ready sizes.

Example screenshots generated with this skill were accepted for Bloom Coffee Shelf Recipe on the App Store.

What It Does

• Builds a full screenshot editor instead of a static one-off page
• Turns raw app captures into ad-style slides with big readable copy
• Lets phones, captions, and decorative elements span adjacent screenshots on one connected canvas
• Keeps older projects safe with isolated-screen export mode until you opt into connected crops
• Saves every deck to app-store-screenshots.json, so the project is git-trackable and resumable
• Uploads picked screenshots into public/screenshots/uploaded/<hash>.png
• Supports iPhone, iPhone Duo (outer and inner displays, portrait and landscape), iPad, Apple TV, Apple Watch, CarPlay, Mac, Android phone, Android tablet, and Play Store feature graphic decks
• Makes App Store creative assets for the product page header and search results (one universal 5244 x 2950 asset, or separate header and search assets)
• Exports exact PNG bundles for all required App Store, Mac App Store, and Google Play sizes
• Supports locales, RTL-aware copy/layout guidance, reusable themes, and in-place project migration
• Ships 18 named visual styles with deep specs and a headline copy library

Current Editor UI

• Connected canvas - view the whole screenshot strip at once, drag elements across screen boundaries, then export each screen as a precise crop.
• Isolated mode - preserve legacy decks where offscreen elements should not leak into neighboring exports.
• Screen sidebar - add, select, and drag-to-reorder screens with live thumbnails.
• Inspector - edit layout, labels, headlines, screenshots, element stacking, and transforms from the right panel. A Copy ideas menu next to the headline drops in a proven formula to rewrite.
• Theme picker - switch palette presets from the toolbar, including one preset per named style.
• Style Lab - see four complete looks for your deck side by side (palette, type, layout rhythm and scene), keep the parts you like with Colors/Type/Layout/Scene locks, shuffle or remix the rest, save favourites, apply one as a single undoable edit, and export a comparison image.
• Scene Playground - restyle every screen at once: backdrops (gradient, solid, aurora, spotlight, grid, dots, ruled) that can flow across the whole strip, decorations, device shadow, glow and 3D tilt, and headline weight, case and alignment.
• Magnifier - add a loupe to any screen that zooms into one detail of its screenshot; aim it on a thumbnail, set the zoom and shape, and drag it anywhere.
• Platform switcher - iOS, Mac, and Android tabs keep every deck side by side while sharing the same editor workflow.
• Device selector - iPhone, iPad, iPhone Duo outer and inner, Apple TV, Apple Watch, CarPlay, and App Store creative assets under iOS; Android phone, Android tablets, and the feature graphic under Android. The Mac tab is a single 16:10 Mac deck.
• Autosave - writes to disk through /api/project, mirrors to localStorage, and detects newer disk revisions before overwriting work from another tab or agent. Failed saves can be retried; unsaved edits trigger a warning before leaving.
• Export bundle - downloads a zip organized by platform, device, resolution, and locale.

Tip: when capturing source iPhone screenshots, the 6.1-inch simulator is usually the easiest starting point because it reduces manual image adjustment inside the frames.

Install

Using npx skills

npx skills add ParthJadhav/app-store-screenshots

Install globally:

npx skills add ParthJadhav/app-store-screenshots -g

Install for a specific agent:

npx skills add ParthJadhav/app-store-screenshots -a claude-code

This works with Claude Code, Cursor, Windsurf, OpenCode, Codex, and other agents supported by skills.

Manual install

git clone https://github.com/ParthJadhav/app-store-screenshots ~/.claude/skills/app-store-screenshots

Usage

Once installed, ask your coding agent for store screenshots:

Build App Store and Google Play screenshots for my app.

The skill guides the agent to ask for your app context, source screenshots, platforms, locales, visual direction, and slide count before generating the editor project.

Example Prompts

Build App Store screenshots for my habit tracker.
The app helps people stay consistent with simple daily routines.
I want 6 slides, clean minimal style, warm neutrals, and a calm premium feel.

Generate App Store screenshots for my personal finance app.
The main strengths are fast expense capture, clear monthly trends, and shared budgets.
I want a sharp modern style with high contrast and 7 slides.

Build Mac App Store screenshots for my menu-bar utility.
The app lives in the menu bar and finds files on this Mac instantly.
I want 5 slides, a dark Mac window frame, and a calm desktop feel.

Build App Store screenshots for my language learning app.
I need English, German, and Arabic screenshot sets.
Use two reusable themes: clean-light and dark-bold.
Make sure Arabic slides feel RTL-native, not just translated.

Better Prompt Tips

• Say what the app does in one sentence
• List the top 3-5 features in priority order
• Mention the platforms and devices you need
• Describe the visual style you want
• Say how many slides you want
• Mention required locales or RTL languages
• Provide source screenshot paths, app icon, and style references when available

What Gets Scaffolded

If starting from an empty folder, the skill creates a Next.js project like this:

project/
├── public/
│   ├── mockup.png
│   ├── app-icon.png
│   ├── frames/                 # Apple's device bezels (bundled)
│   └── screenshots/
│       ├── apple/
│       │   ├── iphone/{locale}/01.png
│       │   ├── ipad/{locale}/01.png
│       │   ├── tvos/{locale}/01.png
│       │   ├── watchos/{locale}/01.png
│       │   ├── carplay/{locale}/01.png
│       │   └── mac/{locale}/01.png
│       └── android/
│           ├── phone/{locale}/01.png
│           ├── tablet-7/portrait/{locale}/01.png
│           ├── tablet-10/landscape/{locale}/01.png
│           └── feature-graphic/{locale}/01.png
├── app-store-screenshots.json
├── src/app/
│   ├── layout.tsx
│   └── page.tsx
├── src/components/editor/
│   ├── screenshot-editor.tsx
│   ├── toolbar.tsx
│   ├── sidebar.tsx
│   ├── inspector.tsx
│   ├── preview-stage.tsx
│   ├── slide-canvas.tsx
│   ├── screenshot-picker.tsx
│   └── device-frames.tsx
└── src/lib/
    ├── constants.ts
    ├── defaults.ts
    ├── storage.ts
    ├── image-cache.ts
    ├── export-render.ts
    └── types.ts

The template README inside skills/app-store-screenshots/template/README.md documents the editor internals in more detail.

Editor Workflow

1. Capture real app screenshots from a simulator, emulator, or device.
2. Ask your agent to scaffold or migrate the screenshot project.
3. Run the dev server and open the editor.
4. Use the sidebar to organize screens and the inspector to edit copy, layouts, screenshots, and elements.
5. Choose Connected or Isolated mode depending on whether elements should cross screen boundaries.
6. Open Style Lab to compare complete looks, or Scene to tune backdrop, depth and headline style by hand.
7. Click Export bundle to download store-ready PNGs.

Uploaded files are saved under public/screenshots/uploaded/, and the canonical deck state is saved in app-store-screenshots.json. Commit both to make the deck reproducible after a fresh clone.

Export Sizes

Apple App Store

App Store Connect has no CarPlay screenshot slot: CarPlay shots are uploaded into the iPhone slot, so the CarPlay deck exports landscape iPhone sizes with a head-unit frame.

Each iPhone Duo display and orientation has its own deck, so portrait and landscape keep independent compositions. Landscape decks make the device the hero under a one-line headline, and Folded + open pairs the closed phone with the opened one. iphone-duo.md has the design research and the rules the skill follows: the displays, what real Duo captures look like, and what the first published sets do. Use real captures from each display: a capture from another display is letterboxed, never cropped or stretched, and the editor says so. Apple's product bezels from Apple Design Resources ship in the template's public/frames/, so iPhone, iPad, Apple Watch, Apple TV, Mac and iPhone Duo are drawn in Apple's own frames. The editor measures each frame's screen cutout. Swap a file for another finish from Apple's pack. Apple licenses the bezels for mock-ups of apps for Apple platforms only. See the template README for the file names.

App Store creative assets

Creative assets use the deck's theme, font, scene and editable copy, with layouts kept inside the art safe area measured from Apple's templates. The editor shows non-exporting safe-area guides and, for the universal asset, estimated header and search crops with live previews. Check final placement in App Store Connect's Preview tool.

Mac App Store

Mac has its own Mac tab because App Store Connect lists macOS as a separate platform from the iOS app. Its bundle exports to macos/mac/<WxH>/<locale>/, next to ios/... and android/.... The Mac window frame has a 16:10 content area, so a full-screen 16:10 capture fills it without cropping.

Google Play Store

Screenshots are designed at the largest size for each device and scaled down for smaller exports. Every export waits until each screenshot has actually painted (Safari/WebKit decodes them asynchronously) and warns instead of silently writing a blank device. Android, iPad, Apple TV, Apple Watch, CarPlay and Mac frames are CSS-rendered, iPhone uses the included mockup.png bezel, and Apple devices use Apple's bundled bezels. Every PNG is opaque 24-bit RGB with no alpha channel.

Project State

• app-store-screenshots.json is the source of truth for app name, active platform, active device, locales, theme, connected-canvas mode, scene, saved Style Lab looks, slides, screenshot paths, magnifiers, and transforms.
• Runtime uploads are written to public/screenshots/uploaded/<hash>.png.
• The editor reads localStorage first for fast paint, then reconciles with the project file.
• Older project files are migrated to schema v2 on load while keeping legacy decks isolated unless connected mode was already enabled.
• Custom themes live in src/lib/constants.ts; unknown theme ids fall back to clean-light.

Styles and Copy

The skill ships 18 named visual styles. Each one has a deep spec in skills/app-store-screenshots/style-prompts/ covering palette, typography, headline emphasis, layout rhythm, decoration density, cross-screen moments, and copy voice. Browse rendered samples and copy-paste prompts in the style gallery.

Name a style in your prompt ("use Swiss Grid Bold") and the agent applies the whole spec. Every named style also has a matching palette preset in the editor's toolbar theme picker.

For headlines, skills/app-store-screenshots/copy-ideas.md has formulas per slide role, ready lines for 13 app categories, eyebrow labels, a weak-to-better table, deck arcs, and localization notes. The same formulas sit in the inspector's Copy ideas menu next to the headline field.

Design Standards

• Screenshots are ads, not documentation
• Each slide should sell one clear user outcome
• Headlines should pass the one-second thumbnail test
• Adjacent slides should vary layout and device placement
• Cross-screen elements should never split required text or critical UI
• Exported crops must still work as standalone screenshots

Tech Stack

Requirements

• Node.js 20.9+
• One of bun, pnpm, yarn, or npm

Contributing

Contributions are welcome, especially around export reliability, screenshot design guidance, migrations, and cross-agent compatibility. Start with CONTRIBUTING.md.

License

MIT

Author

Created by Parth Jadhav.