Apple App Store ASO Optimization Skill

A comprehensive Claude Code skill for generating optimized Apple App Store metadata with ASO (App Store Optimization) best practices, competitive analysis, and automated validation.

Pairs well with:

• Astro MCP Server - Full-featured MCP server for comprehensive ASO analytics and keyword research
• App Store MCP
• Krankie - Lightweight, agent-first CLI for tracking App Store keyword rankings. No MCP setup required—just install with bun install -g krankie and run. Stores ranking history locally in SQLite, perfect for monitoring keyword positions over time and measuring the impact of your ASO changes. This skill includes instructions for using Krankie to establish baselines, track competitors, and measure optimization results.

🎯 What This Skill Does

This skill transforms Claude Code into an ASO expert that can:

• Analyze app concepts and generate optimized App Store metadata
• Validate character limits automatically against Apple's requirements
• Provide competitive analysis insights using proven ASO strategies
• Recommend screenshot storyboards with caption optimization
• Apply 2025 algorithm updates including screenshot caption OCR indexing

📋 Features

Metadata Optimization

• App Name (30 chars) - Highest ranking weight
• Subtitle (30 chars) - Second strongest ranking factor
• Promotional Text (170 chars) - Conversion optimization
• Description (4,000 chars) - Not indexed, purely for conversion
• Keywords (100 chars) - Hidden but indexed field
• What's New (4,000 chars) - Update messaging

Automated Validation

Python script validates all metadata against Apple's strict character limits with clear ✅/❌ indicators and remaining character counts.

Comprehensive Knowledge Base

47KB of ASO best practices including:

• June 2025 screenshot caption OCR algorithm update
• Metadata hierarchy and indexing rules
• Competitive analysis frameworks
• Rating optimization strategies
• Localization guidance
• A/B testing recommendations

Screenshot Strategy

• Caption optimization for new OCR indexing
• A.I.D.A. framework recommendations
• Visual content best practices
• Localization considerations

🚀 Installation

Option 1: Skills CLI (Recommended)

npx skills add timbroddin/app-store-aso-skill

This will install the skill and make it available to your agent automatically.

Option 2: Git Clone

cd ~/.claude/skills/
git clone https://github.com/timbroddin/app-store-aso-skill.git app-store-aso

Option 3: Manual Install

1. Download the latest release .zip file
2. Extract to your Claude Code skills directory:

   unzip app-store-aso.zip -d ~/.claude/skills/
   

3. Restart Claude Code (if currently running)

Verify Installation

The skill structure should look like:

~/.claude/skills/app-store-aso/
├── SKILL.md                          # Main skill instructions
├── README.md                         # This file
├── scripts/
│   └── validate_metadata.py         # Validation script
└── references/
    └── aso_learnings.md             # Comprehensive ASO knowledge base

💡 Usage

The skill activates automatically when you ask Claude Code about App Store optimization. Simply describe your app and request ASO help:

Example Queries

Basic optimization:

"I have an iOS meditation app called 'CalmSpace'.
Help me optimize the App Store metadata."

With context:

"This is a fitness tracking app for runners.
I've added a new social feature and marathon training plans.
Generate optimized metadata and screenshot recommendations."

Metadata review:

"Review my current App Store listing:
Title: FitTrack - Run & Workout
Subtitle: GPS Running & Fitness Log
Keywords: running,tracker,fitness,workout,gps
Optimize this for better rankings."

Output Format

Claude will provide:

1. 📱 App Metadata Recommendations

   • Optimized title, subtitle, promotional text
   • Strategic keyword list
   • Compelling description

2. ✅ Validation Results

   • Character count checks against limits
   • Clear pass/fail indicators
   • Remaining character counts

3. 🎯 Competitive Analysis

   • Positioning recommendations
   • Keyword opportunities
   • Market insights

4. 📸 Screenshot Storyboard Strategy

   • Ordered screenshot recommendations
   • Caption optimization for OCR indexing
   • Visual messaging hierarchy

🛠️ Validation Script

The included Python script can also be run manually:

Interactive Mode

python ~/.claude/skills/app-store-aso/scripts/validate_metadata.py

Command-Line Mode

python ~/.claude/skills/app-store-aso/scripts/validate_metadata.py \
  --app-name "My Amazing App" \
  --subtitle "The Best App for Everything" \
  --keywords "app,best,amazing,everything,awesome"

📊 Apple App Store Character Limits

Field	Limit	Indexed?	Impact
App Name	30 chars	✅ Yes	Highest ranking weight
Subtitle	30 chars	✅ Yes	Second strongest
Promotional Text	170 chars	❌ No	Conversion only
Description	4,000 chars	❌ No	Conversion only
Keywords	100 chars	✅ Yes	Significant ranking
What's New	4,000 chars	❌ No	Update messaging
Screenshot Captions	Variable	✅ Yes	NEW in June 2025

🆕 What's New in 2025

June 2025 Algorithm Update

Apple deployed OCR technology to extract and index screenshot captions for the first time since 2017. This skill includes:

• Caption optimization strategies for OCR readability
• High-contrast text recommendations
• Keyword reinforcement techniques
• Visual hierarchy best practices

Other 2025 Changes

• Elimination of new app boost
• Custom Product Pages for organic keywords
• Enhanced in-app event indexing
• 4-week update cycle optimization

🎓 ASO Best Practices Included

• Metadata Hierarchy: Title > Subtitle > Screenshot Captions > Keywords
• No Duplication: Each keyword should appear only once across title/subtitle/keywords
• Update Frequency: Every 2-4 weeks minimum
• Rating Target: 4.5+ stars for optimal visibility
• Localization: 35% average impression increase
• A/B Testing: Product Page Optimization strategies

🤝 Contributing

Contributions welcome! Areas for improvement:

• Additional ASO research and case studies
• More validation checks (keyword density, etc.)
• Screenshot template generators
• Competitor analysis automation
• Localization tools

📄 License

MIT License - see LICENSE file for details

🙏 Acknowledgments

Built using the Claude Skill Creator.

ASO knowledge compiled from industry research, official Apple documentation, and analysis from leading ASO platforms.

📞 Support

• Issues: Report bugs or request features via GitHub Issues
• Discussions: Ask questions in GitHub Discussions

🔗 Resources

• Apple App Store Review Guidelines
• App Store Connect Help
• Product Page Optimization
• Claude Code Skills Documentation

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Made with ❤️ for the Claude Code community