The Ultimate ASO Checklist for App Store & Google Play

Launching an app without proper App Store Optimization is like opening a store on a busy street with no sign, no window display, and the door half-closed. You might get some foot traffic, but you're leaving most of your potential customers walking past. This ASO checklist covers every optimization point across both the Apple App Store and Google Play Store — from metadata and keywords to visuals, ratings, and ongoing maintenance. Use it as a pre-launch audit, a post-launch tune-up, or a quarterly optimization review.

Pre-Optimization Checklist

Before diving into specific ASO tactics, make sure these foundations are in place:

• Define your target audience clearly. Who is your ideal user? What problem does your app solve for them? What words do they use to describe that problem?
• Identify your top 5 competitors. Not category competitors — ASO competitors. Which apps appear when you search your target keywords?
• Set up tracking. You need an ASO tool to monitor keyword rankings, download trends, and conversion rates. Without tracking, optimization is guesswork.
• Establish baseline metrics. Before making changes, record your current keyword rankings, daily downloads, conversion rate, and rating. You can't measure improvement without a starting point.

Part 1: Keyword Optimization Checklist

iOS (Apple App Store)

• App title (30 characters): Includes your primary keyword naturally alongside your brand name.
• Subtitle (30 characters): Contains a secondary keyword and communicates your core value proposition.
• Keyword field (100 characters): Filled completely — every character is valuable real estate.
• No duplicate words across title, subtitle, and keyword field. Apple indexes all three as a combined set. Repeating words wastes characters.
• Singular forms used in keyword field. Apple matches both singular and plural automatically.
• No spaces after commas in keyword field. Spaces count against your 100-character limit.
• Removed "app," category name, and your app name from keyword field. Apple indexes these automatically.
• Removed prepositions and articles ("the," "and," "for," "a") unless they're part of a compound keyword.
• Cross-locale keyword strategy implemented. The US store indexes English (US) + Spanish (Mexico). Use the Spanish locale for additional English keywords you couldn't fit elsewhere.
• Keywords are relevant to your app. High-volume keywords that don't match your app will tank conversion rates and can trigger Apple review flags.

Google Play

• App title (50 characters): Includes primary keyword phrase naturally.
• Short description (80 characters): Contains secondary keyword and a compelling benefit statement.
• Long description (4,000 characters): Includes all target keywords naturally throughout the text.
• Primary keywords appear 3-5 times in long description. Enough for Google's algorithm to identify relevance, not so much that it reads as stuffing.
• Long description is structured with headers and bullet points. Google indexes the text, but users also read it. Make it scannable.
• Description opens with your most important keywords in the first 1-2 sentences. The opening carries more weight.
• Developer name includes a relevant keyword (if applicable and natural).

Keyword Research Quality Check

• You have a ranked keyword list of 50+ targets. Prioritized by volume, difficulty, and relevance.
• You've analyzed competitors' keywords. Identified gaps where they rank and you don't.
• You've checked auto-suggest keywords. Typed partial queries into both stores and captured suggestions.
• Keywords match user intent. Each keyword reflects someone who would actually download your app.
• Mix of head terms and medium-tail keywords. Don't just target the most competitive terms — include achievable mid-range keywords.

Part 2: Visual Asset Checklist

App Icon

• Simple and recognizable at all sizes. Test at 29×29, 60×60, and 1024×1024 pixels.
• Uses bold, distinctive colors. Stands out against both light and dark store backgrounds.
• No text on the icon. Text is unreadable at small sizes and makes the icon look cluttered.
• Doesn't closely resemble a competitor's icon. Distinctiveness is important for brand recognition.
• A/B tested at least 3 variations. Your assumption about what works is probably wrong — let data decide.
• Consistent with your brand identity. The icon should feel like it belongs to your app when users see it in their home screen.

Screenshots

• All available screenshot slots filled. iOS allows 10, Google Play allows 8. Use them all.
• First 2-3 screenshots showcase your #1 value proposition. These are visible without scrolling in search results.
• Each screenshot has a clear, benefit-focused caption. "Track expenses in 3 seconds" beats "Expense tracking feature."
• Screenshots show actual app UI. Users want to see what they're downloading, not abstract graphics.
• Visual hierarchy guides the eye. Caption at top, device frame in center, supporting detail below.
• Screenshots work as a sequence. They should tell a story: problem → features → outcome.
• Screenshots also work individually. Each one should make sense on its own since many users only see the first few.
• Localized screenshots for major markets. Translated captions and culturally appropriate imagery for your top 5 markets.
• iPhone and iPad screenshots are separate and optimized. Don't just scale iPhone screenshots for iPad — adapt the layout.
• Screenshots updated within the last 6 months. Outdated screenshots with an old UI erode trust.

Preview Video (Optional but Recommended)

• Under 30 seconds. Shorter is better — 15-20 seconds is ideal.
• Shows the app in action within the first 3 seconds. Don't start with a logo animation or title card.
• Includes text captions. Most users browse with sound off.
• Demonstrates the core use case. Problem → your app solving it → outcome.
• Ends with a call to action. Even a simple "Download free" or "Try it today."
• Poster frame (thumbnail) is compelling. This is what users see before the video plays — make it count.

Part 3: App Store Listing Content Checklist

App Description (iOS — Not Indexed for Search)

While Apple doesn't index the description for keyword search, it still impacts conversion:

• First sentence hooks the reader. The "More" truncation on iOS shows only ~167 characters initially.
• Features presented as benefits. "Never miss a bill payment" instead of "Bill tracking feature."
• Bullet points for scanability. Dense paragraphs get skipped.
• Social proof included. Press mentions, awards, download milestones, user testimonials.
• Clear call to action at the end. "Download now and start your free trial."
• No keyword stuffing. The description doesn't affect search, so write for humans only.

What's New / Release Notes

• Updated with every release. Don't leave "Bug fixes and improvements" as your perpetual update note.
• Highlights new features and improvements. Show users the app is actively maintained.
• Written in a friendly, on-brand tone. Release notes are a touchpoint — make them pleasant.
• Includes a seasonal or timely note when relevant. "Just in time for New Year's resolutions" in January, etc.

Promotional Text (iOS, 170 characters)

• Updated for current promotions or seasonal events. This field can be changed without a new app submission.
• Communicates urgency or timeliness. "New: AI-powered suggestions" or "50% off annual plan this week."
• Doesn't duplicate the subtitle. Use this space for timely messaging, not static value props.

Part 4: Ratings & Reviews Checklist

• Average rating is 4.0+ stars. Below 4.0, conversion rates drop significantly. Below 3.5, your app may be filtered out of some search results.
• Rating prompt implemented. Using SKStoreReviewController (iOS) or In-App Review API (Android).
• Rating prompt triggers after positive moments. After completing a task, reaching a goal, using the app 5+ times — not on first launch or during frustrating moments.
• Review responses are active. Responding to negative reviews within 24-48 hours, especially on Google Play where responses are publicly visible.
• Bug-related negative reviews trigger development action. Track recurring complaints and prioritize fixes.
• Review velocity is positive. You're getting new reviews regularly, not just living off legacy reviews.
• Featured review on iOS is positive. Apple sometimes pins a "Most Helpful" review — monitor and encourage positive reviews to maintain this.

Part 5: Localization Checklist

• Top 5 markets by potential are identified. Based on your app's target audience and market opportunity.
• Keyword research done separately for each language. Not translated from English — researched natively.
• Metadata fully localized. Title, subtitle, keyword field, description in each target language.
• Screenshots localized. Translated captions and culturally appropriate imagery.
• Date, currency, and number formats adapted. If shown in screenshots or descriptions.
• What's New text localized. For each target locale.
• Native speaker review completed. Machine translation alone isn't sufficient for marketing copy.

Part 6: Technical ASO Checklist

• App size is optimized. Smaller apps have higher conversion rates, especially in markets with slower internet. Use App Thinning (iOS) and Android App Bundles.
• Deep links configured. For organic search indexing and marketing campaign attribution.
• App Indexing enabled. iOS Universal Links and Android App Links for web-to-app search visibility.
• In-App Events configured (iOS). Apple features in-app events in search results and editorial sections. Use them for promotions, challenges, competitions, and live events.
• LiveActivities / Dynamic Island support (iOS). Increases engagement signals that feed back into rankings.
• Category selection is optimal. Your primary category should match where your core audience browses. Secondary category expands visibility.
• Age rating is accurate. Incorrect age ratings can limit your visibility or trigger review rejections.

Part 7: Ongoing Maintenance Checklist

Weekly

• Check keyword ranking movements.
• Read and respond to new reviews.
• Monitor competitor listing changes.
• Review download and conversion trends.

Monthly

• Analyze keyword performance — drop underperformers, test new keywords.
• Check conversion rate trends — if declining, investigate creative fatigue.
• Review rating trends — if dropping, identify root cause.
• Update promotional text (iOS) if running time-bound campaigns.

Quarterly

• Full keyword audit with fresh competitor analysis.
• Screenshot refresh or A/B test.
• Localization review — add new markets if growth justifies it.
• ASO strategy review — align with product roadmap and seasonal trends.
• Competitive landscape review — new entrants, competitor strategy shifts.

The ASO Score Card

Use this scorecard to quickly assess your ASO health:

4.0+: Your ASO is in good shape. Focus on iteration and testing.
3.0-3.9: Solid foundation but clear gaps. Prioritize the lowest-scoring areas.
Below 3.0: Significant ASO opportunity being left on the table. Start with keywords and visuals.

How Appalize Supports Your ASO Checklist

Appalize gives you the data and tools to work through this checklist efficiently:

• Keyword tracking — See exactly where you rank for every target keyword and how positions change over time.
• Competitor monitoring — Track competitor keyword strategies, rating changes, and listing updates.
• Analytics dashboard — Downloads, conversion rates, and revenue in one view, making weekly check-ins fast and actionable.
• Multi-market support — Track ASO performance across every App Store and Google Play market from a single dashboard.

Don't just optimize once — build a systematic ASO practice. Start with Appalize and keep your app store presence sharp every week.

Conclusion

ASO isn't a single task — it's a system. This checklist gives you a repeatable framework for auditing and improving every element of your app store presence. Print it out, work through it section by section, and use it quarterly to catch anything that's slipped.

The difference between apps that grow organically and apps that plateau isn't talent or budget — it's consistency. The teams that work through a checklist like this every quarter, making incremental improvements each time, are the ones that build lasting organic visibility.

Start with the sections where you score lowest. Make the changes. Measure the impact. Then move to the next area. That's how ASO compounds over time.