
Metadata Optimization
Rewrite App Store and Play listing title, subtitle, keyword field, and description to hit character limits, rank for target keywords, and improve conversion.
Overview
Metadata Optimization is an agent skill for the Launch phase that writes and optimizes App Store and Play title, subtitle, keyword field, and description within platform limits.
Install
npx skills add https://github.com/eronred/aso-skills --skill metadata-optimizationWhat is this skill?
- Platform limit cheat sheet: iOS title/subtitle 30 chars, keyword field 100, description 4000; conversion vs indexed fiel
- Initial assessment flow: app-marketing-context.md, App ID, keywords, platform, country
- Expert ASO copywriter stance balancing search weight (title/subtitle/keywords) vs conversion-only description and promo
- Cross-links to keyword-research for discovery and aso-audit for full listing reviews
- Supports iOS, Android, or both with US default country positioning
- iOS title and subtitle 30 characters each; keyword field 100 characters
- iOS description limit 4000 characters; promotional text 170 characters
- Initial assessment lists 5 intake steps including platform and country
Adoption & trust: 1.8k installs on skills.sh; 1.5k GitHub stars; 3/3 security scanners passed (skills.sh audits).
What problem does it solve?
You have keywords and positioning but your listing title, subtitle, and descriptions either waste character limits or fail to convert browsers into installers.
Who is it for?
Indie app builders refreshing listings after keyword-research or preparing a new locale launch.
Skip if: Full-store audits, screenshot creative, paid UA strategy, or teams with no App ID or positioning to work from.
When should I use this skill?
When optimizing App Store metadata—title, subtitle, keyword field, or description—or when the user mentions optimize my title, ASO metadata, keyword field, character limits, app description, or write my subtitle.
What do I get? / Deliverables
You get store-ready metadata drafts per platform that respect indexed vs non-indexed fields and align with your app marketing context.
- Platform-specific title, subtitle, and keyword field drafts
- Conversion-oriented description and promo text suggestions
Recommended Skills
Journey fit
Store metadata is the primary launch/aso artifact—this skill sits where listings go live or get refreshed for search and download intent. Title, subtitle, hidden keyword field, and description work are core app-store optimization, not general web SEO or analytics.
How it compares
Listing copy and field optimization—pair with keyword-research for terms and aso-audit for end-to-end store health, not web landing-page SEO alone.
Common Questions / FAQ
Who is metadata-optimization for?
Solo app marketers and builders who own App Store Connect or Play Console copy and need compliant, keyword-aware metadata.
When should I use metadata-optimization?
When you say optimize my title, ASO metadata, keyword field, character limits, app description, or write my subtitle—typically at launch or before a store update.
Is metadata-optimization safe to install?
It is procedural copy guidance; review the Security Audits panel on this Prism page before installing any third-party skill that might access your repo or secrets.
SKILL.md
READMESKILL.md - Metadata Optimization
# Metadata Optimization You are an expert ASO copywriter who specializes in crafting App Store metadata that maximizes both search visibility and conversion rate. Your goal is to write metadata that ranks for target keywords while compelling users to download. ## Initial Assessment 1. Check for `app-marketing-context.md` — read it for positioning and target audience 2. Ask for the **App ID** (to see current metadata) 3. Ask for **target keywords** (or suggest running `keyword-research` first) 4. Ask for **platform** (iOS / Android / Both) 5. Ask for **target country** (default: US) ## Platform-Specific Limits ### Apple App Store (iOS) | Field | Limit | Indexed for Search? | Notes | |-------|-------|-------------------|-------| | Title | 30 chars | Yes | Highest keyword weight | | Subtitle | 30 chars | Yes | Second highest weight | | Keyword Field | 100 chars | Yes | Hidden, comma-separated | | Description | 4000 chars | No | For conversion only | | Promotional Text | 170 chars | No | Can change without review | | What's New | 4000 chars | No | Shown on update | ### Google Play (Android) | Field | Limit | Indexed for Search? | Notes | |-------|-------|-------------------|-------| | Title | 30 chars | Yes | Highest keyword weight | | Short Description | 80 chars | Yes | Visible on listing | | Full Description | 4000 chars | Yes | Keyword density matters | ## Optimization Framework ### Title Optimization **Goal:** Include the #1 target keyword naturally with your brand name. **Formulas that work:** - `[Brand] - [Primary Keyword]` (e.g., "Calm - Sleep & Meditation") - `[Brand]: [Benefit Phrase]` (e.g., "Duolingo: Language Lessons") - `[Primary Keyword] [Brand]` (e.g., "Headspace: Mindful Meditation") **Rules:** - Lead with brand if it's well-known; lead with keyword if it's not - Don't stuff multiple keywords unnaturally - Must read naturally — users see this in search results - Use the full 30 characters - Avoid special characters that waste space (™, ®) **Provide 3 title options** with character counts and keyword analysis. ### Subtitle Optimization (iOS) **Goal:** Add secondary keywords that complement the title. **Rules:** - Never repeat keywords from the title - Focus on benefits, not features - Use the full 30 characters - Can include a call-to-action feel **Provide 3 subtitle options** with character counts. ### Keyword Field (iOS) **Goal:** Maximize keyword coverage in 100 characters. **Rules:** - Comma-separated, NO spaces after commas - Never repeat words from title or subtitle - Use singular forms only (Apple indexes both) - Don't include your app name or category name - Don't include "app" or "free" - Don't include competitor brand names (policy violation) - Prioritize by: volume × relevance **Output format:** ``` keyword1,keyword2,keyword3,keyword4,... Characters used: [X]/100 ``` ### Description (iOS — Conversion Focus) **Structure:** 1. **Hook (first 3 lines)** — This is all users see before "more". Make it count. 2. **Social proof** — Awards, press mentions, user count, rating 3. **Key features** — 4-6 bullet points with benefits, not just features 4. **How it works** — Simple 3-step explanation 5. **Testimonial or review quote** — Real user voice 6. **CTA** — Clear call to download **Rules:** - First 170 characters are critical (visible without tapping "more") - Use line breaks and emoji for scannability - Focus on benefits ("Sleep better tonight") not features ("White noise generator") - Include social proof early ### Description (Android — SEO + Conversion) Same structure as iOS, but a