App Store Listing Optimizer

App Store Listing Optimizer

Craft high-converting, keyword-optimized App Store and Google Play listings through competitive research, strategic keyword selection, and data-driven screenshot planning.

Prerequisites

• Chrome browser with Claude in Chrome extension (for browsing competitor

listings)

• No API keys required — all research uses live store browsing
• Supports iOS App Store, Google Play Store, or both

Workflow Overview

1. App Analysis        — Understand the app, audience, differentiators
2. Competitive Research — Browse competitor listings, extract keywords
3. Keyword Selection    — Identify high-intent, low-competition keywords
4. Craft the Listing    — Write optimized metadata for each platform
5. Screenshot Strategy  — Plan visual sequence and caption copy
6. A/B Test Variants    — Generate 2-3 alternatives for split testing

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Step 1: Analyze the App

Gather everything needed to position the app effectively. Ask the user:

1. What does the app do? One sentence, plain language.
2. Target platform? iOS, Android, or both?
3. Who is it for? Primary audience, age range, expertise level.
4. Top 3 features — What does it do better or differently?
5. Differentiator — Why pick this over competitors?
6. Monetization — Free, freemium, subscription, one-time purchase?
7. Current listing (if updating) — Share the existing store URL.

Document the answers in a structured brief before proceeding.

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Step 2: Competitive Keyword Research

Browse 8-12 competitor listings on the target store(s) using Chrome. For detailed methodology and search patterns, see [references/keyword-research.md](references/keyword-research.md).

What to Extract Per Competitor

| Field | Where to Find | | ---------------- | ----------------------------------------- | | App name | Title on store listing | | Subtitle / short | Below title (iOS) or short desc (Android) | | Full description | Store listing body | | Rating + count | Store listing header | | Category rank | Store listing or chart position | | Screenshots | Visual carousel — note caption text |

Keyword Extraction Process

1. List every keyword and phrase from competitor titles and subtitles.
2. Scan descriptions for repeated terms — these are intentional keyword

targets.

1. Note caption text on competitor screenshots — often contains keyword

variations.

1. Build a master keyword list of 40-60 candidate terms.

Platform Differences

• iOS: Only the app name, subtitle, and keyword field are indexed for

search. The description is NOT searchable — it exists purely for conversion.

• Google Play: The full description IS indexed. Keyword density matters, but

avoid stuffing. The short description carries extra weight.

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Step 3: Keyword Selection

Narrow the master list to the highest-value keywords.

Selection Criteria

| Factor | What to Look For | | --------------- | ------------------------------------------------------------- | | Relevance | Directly describes what the app does or solves | | Intent | User searching this term wants what the app offers | | Competition | Fewer top-rated apps ranking for this term = better chance | | Volume | Term appears across multiple competitor listings | | Length | Longer phrases (2-3 words) = lower competition, higher intent |

Prioritization Tiers

• Tier 1 (must use): High relevance + clear intent + moderate competition.

Place in title or subtitle.

• Tier 2 (strong): Good relevance + decent volume. Place in iOS keyword

field or Google Play description.

• Tier 3 (supplemental): Related terms, synonyms, adjacent use cases. Fill

remaining keyword space.

iOS Keyword Field Rules

The 100-character keyword field has specific optimization rules:

• Comma-separated, no spaces after commas (wastes characters)
• Do NOT repeat words already in the app name or subtitle
• Do NOT include the word "app" (Apple adds it automatically)
• Do NOT include plurals if the singular is present (Apple handles this)
• Do NOT include common prepositions or articles
• Use singular forms only
• Include competitor brand misspellings only if ethical and relevant

Google Play Keyword Strategy

• No keyword field exists — optimize within the description text
• Repeat primary keywords 3-5 times naturally across the full description
• Place highest-priority keywords in the first paragraph and short description
• Use keyword variations and synonyms throughout
• Avoid keyword stuffing — Google penalizes unnatural density

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Step 4: Craft the Listing

Write optimized metadata for each target platform.

App Name (both platforms: 30 characters max)

• Include the primary keyword naturally
• Lead with the brand name if it has recognition; otherwise lead with the

keyword

• Format options: BrandName - Keyword Phrase or Keyword Phrase: BrandName
• Test readability — truncation happens around 20-25 chars in search results

iOS Subtitle (30 characters max)

• Reinforce the value proposition with secondary keywords
• Do NOT repeat words from the app name
• Focus on benefit, not feature: "Sleep Better Tonight" > "Sleep Tracker App"
• Every character counts — use the full 30

Google Play Short Description (80 characters max)

• Searchable and prominently displayed — treat as a headline + subtitle combined
• Include 1-2 primary keywords
• Communicate the core value proposition
• More space than iOS subtitle — use it to differentiate

iOS Keyword Field (100 characters max)

Apply the rules from Step 3. Present the final keyword string with character count. Example format:

sleep,tracker,insomnia,white,noise,meditation,relax,bedtime,routine,calm
(87/100 characters)

Full Description

iOS (not searchable — optimize for conversion):

• First 3 lines appear before "Read More" — hook immediately
• Lead with the strongest benefit statement
• Use short paragraphs and line breaks for scannability
• Include social proof (awards, press, user count) early
• End with a clear call to action
• Unicode symbols (checkmarks, stars) draw the eye in bullet lists

Google Play (searchable — balance keywords + conversion):

• First 3 lines appear before "Read More" — same hook principle
• Weave primary keywords into the first paragraph naturally
• Use keyword variations throughout (don't repeat the exact same phrase)
• Structure: Hook > Features > Social proof > CTA
• 4,000 character max — use 3,000-3,500 for optimal density
• Include a "What's New" narrative for returning visitors

First 3 Lines Template

These lines appear in search results before the user taps "Read More." They must accomplish three things: (1) state the core benefit, (2) differentiate from competitors, (3) compel the tap.

{Primary benefit statement — what the user gets}
{Differentiator — why this app, not the others}
{Social proof or specificity — numbers, awards, or unique method}

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Step 5: Screenshot Strategy

Plan the visual sequence for maximum conversion. For detailed caption formulas, device specs, and sequence patterns, see [references/screenshot-formulas.md](references/screenshot-formulas.md).

Key Principles

• First 3 screenshots appear in search results — they must tell the story

alone

• Screenshot 1 is the most important asset in your entire listing
• Show the app in action, not splash screens or logos
• Every screenshot needs a caption — text above or below the device frame
• Social proof screenshots (ratings, user count) measurably increase conversion
• App preview videos autoplay in iOS search results — consider one if the app

has visual appeal

Recommended Sequence (5-10 screenshots)

| Position | Purpose | Caption Focus | | -------- | ---------------------- | --------------------------------- | | 1 | Hero / primary benefit | Strongest value proposition | | 2 | Key feature #1 | Most differentiating feature | | 3 | Key feature #2 | Second strongest feature | | 4 | Social proof | Ratings, user count, press quote | | 5 | Feature #3 | Unique capability | | 6 | Customization / UI | Show personalization options | | 7 | Before/after or result | Outcome the user achieves | | 8 | Pricing / value | What they get for the price | | 9-10 | Additional features | Remaining noteworthy capabilities |

Platform-Specific Limits

• iOS: Up to 10 screenshots per device type. First 3 shown in search.
• Google Play: Up to 8 screenshots per device type. First 3-4 shown in

search. Feature graphic (1024x500) is required and prominently displayed.

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Step 6: A/B Test Variants

Generate 2-3 alternatives for the highest-impact elements. Present all variants in a comparison table.

What to Test (in priority order)

1. App subtitle / short description — Highest impact on conversion from

search results

1. First 3 description lines — Controls "Read More" tap-through rate
2. Screenshot 1 caption — First visual impression
3. App name keyword — Only test if willing to change the indexed name

Variant Generation Rules

• Each variant should test ONE hypothesis (benefit-led vs feature-led, emotional

vs rational, specific vs broad)

• Keep variants meaningfully different — changing one word is not a real test
• Label variants clearly: Variant A (control), Variant B, Variant C
• Note the hypothesis each variant tests

Output Format

## A/B Test Plan

### Subtitle Variants (iOS)

| Variant | Text                 | Hypothesis           | Chars |
| ------- | -------------------- | -------------------- | ----- |
| A       | {current or default} | Benefit-focused      | XX/30 |
| B       | {alternative}        | Feature-focused      | XX/30 |
| C       | {alternative}        | Social-proof-focused | XX/30 |

### First 3 Lines Variants

| Variant | Lines          | Hypothesis       |
| ------- | -------------- | ---------------- |
| A       | {3-line block} | Emotional hook   |
| B       | {3-line block} | Data-driven hook |

### Screenshot 1 Caption Variants

| Variant | Caption   | Hypothesis      |
| ------- | --------- | --------------- |
| A       | {caption} | Problem-focused |
| B       | {caption} | Outcome-focused |

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Localization Notes

• Localizing the listing into 5-10 languages multiplies keyword reach

significantly — each locale has its own keyword index

• Prioritize: Spanish, French, German, Japanese, Korean, Portuguese, Chinese

(Simplified)

• At minimum, localize the app name, subtitle, keywords, and first 3 description

lines

• Google Play auto-translates listings but manual localization always

outperforms

• Each locale can target entirely different keywords for the same app

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Deliverables Checklist

Present the final optimized listing as a structured document:

• [ ] App name (with character count)
• [ ] iOS subtitle (with character count)
• [ ] Google Play short description (with character count)
• [ ] iOS keyword field (with character count)
• [ ] Full description — iOS version
• [ ] Full description — Google Play version (keyword-optimized)
• [ ] Screenshot sequence plan with captions (5-10 screenshots)
• [ ] A/B test variants table (2-3 per element)
• [ ] Localization priority list (if applicable)

Save the complete listing document as ASO-{AppName}.md.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: robertguss
• Source: robertguss/claude-code-toolkit
• License: MIT
• Homepage: https://robertguss.github.io/claude-skills/

Install and usage instructions live in the source repository linked above.