Back to Blog ASO ChecklistApp Store Optimization ChecklistASO Checklist 2026App Launch SEO ChecklistPre-Launch ASO ChecklistASO Audit Checklist
The Ultimate ASO Checklist: 30 Steps to a Fully Optimized App Store Listing
30-step ASO checklist covering metadata, screenshots, localization, ratings, and keyword tracking. Optimize your listing before launch.
Step 2: Subtitle/Short Description Includes Secondary Keyword
Step 3: iOS Keyword Field Uses All 100 Characters
Step 4: Description Is 2,000+ Characters With Natural Keyword Placement
Step 5: Description First Paragraph Hooks the Reader
Step 12: App Icon Is Distinctive and Readable at Small Sizes
Step 13: Preview Video Shows Core Functionality (First 3 Seconds)
Step 16: Keywords Researched Per Locale (Not Just Translated)
Step 17: Screenshots Localized With Translated Captions
Step 18: Cultural Adaptation Applied (Not Literal Translation)
What are the most important items on an ASO checklist for a new app launch?
Do I need separate ASO checklists for iOS and Google Play?
What is the biggest ASO mistake that a checklist can prevent?
There are over 5 million apps across the Apple App Store and Google Play. Roughly 70% of all app installs start with a store search. That means the difference between 100 downloads and 100,000 downloads often comes down to how well your listing is optimized — not how much you spend on ads.
The problem is that app store optimization has dozens of moving parts. Metadata, screenshots, localization, ratings, tracking — miss even a few and your listing underperforms. Most developers optimize once at launch and never revisit it. Six months later, they've lost half their keyword rankings to competitors who kept iterating.
This ASO checklist gives you 30 concrete, actionable steps organized into five categories. Whether you're preparing for a first launch or auditing an app that's been live for years, work through each item systematically. Bookmark this page and return to it monthly — ASO is not a one-time project, it's an ongoing discipline. If you're brand new to the topic, start with our guide to app store ranking factors to understand what the algorithms actually prioritize.
Metadata Optimization (Steps 1–8)
Metadata is the foundation of every ASO strategy. These are the text fields that the App Store and Google Play algorithms index for search ranking. Get them right and you'll show up when users search for what your app does. Get them wrong and no amount of ad spend can compensate for organic invisibility.
Step 1: Title Uses 25–30 Characters With Primary Keyword
Your app title is the single most heavily weighted ranking signal on both platforms. Apple allows 30 characters; Google Play allows 50. Lead with your primary keyword — the term with the highest search volume and clearest relevance to your app. If brand recognition is low, consider placing the keyword before your brand name.
A title like "FitTrack — Calorie Counter" hits the keyword and the brand in 26 characters. "FitTrack" alone wastes precious indexing real estate. Every character you leave unused is a missed opportunity to rank.
Step 2: Subtitle/Short Description Includes Secondary Keyword
On iOS, the subtitle (30 characters) appears directly below the title in search results. On Google Play, the short description (80 characters) serves a similar role. This is your second-most-weighted text field — use it for a secondary keyword that complements your title without repeating it.
Good example: Title is "FitTrack — Calorie Counter" and subtitle is "Meal Planner & Weight Loss." That covers three keyword clusters without duplication.
Step 3: iOS Keyword Field Uses All 100 Characters
Apple provides a hidden 100-character keyword field (comma-separated, no spaces after commas). This field is indexed for search but never shown to users. Using 98 characters instead of 100 means you're leaving ranking potential on the table. Do not duplicate words already in your title or subtitle — Apple ignores duplicates and you waste character space.
Use tools like AppDrift's AI metadata generator to identify high-opportunity keywords that maximize your 100-character budget across difficulty, volume, and relevance.
Step 4: Description Is 2,000+ Characters With Natural Keyword Placement
On Google Play, the full description (up to 4,000 characters) is indexed for search — making it a critical ranking field. Repeat your primary keyword 3–5 times naturally throughout the body. On iOS, the description is NOT indexed for search, but it still impacts conversion. In both cases, write for humans first and algorithms second.
Aim for at least 2,000 characters. Short descriptions signal a low-effort listing to both users and the algorithm. Use bullet points, short paragraphs, and clear benefit statements to make the text scannable.
Step 5: Description First Paragraph Hooks the Reader
Both platforms show only the first 1–3 lines of your description before the "Read More" fold. This opening paragraph needs to accomplish two things: communicate your core value proposition and compel the user to keep reading (or just install). Avoid vague statements like "The best app for productivity." Instead, be specific: "Track tasks, set reminders, and sync across all your devices in under 10 seconds."
Step 6: No Prohibited Words Used
Both Apple and Google reject or penalize listings that use certain terms. Avoid superlatives like "best," "#1," or "top" unless you can substantiate them. Do not use the word "free" if your app has in-app purchases that are required for core functionality. Apple is especially strict about misleading claims and will reject your submission outright. Review both platforms' content guidelines before every metadata update.
Step 7: Promotional Text Is Current (iOS)
Apple's Promotional Text field (170 characters) sits above the description and can be updated without submitting a new app version. Use it for timely messaging: seasonal promotions, new feature announcements, limited-time offers. If your promotional text still says "New Year Special!" in April, it signals neglect to potential users.
Step 8: Release Notes Mention Latest Improvements
Release notes appear on your product page and in the Updates tab. Users read them — especially loyal users deciding whether to update. Generic notes like "Bug fixes and improvements" waste an engagement opportunity. Instead, highlight specific improvements: "Added dark mode, fixed crash on iPhone 15 Pro, improved sync speed by 40%." On Google Play, release notes are also lightly indexed for search.
Pro tip: AppDrift's AI metadata generator creates optimized titles, subtitles, descriptions, and keywords for both platforms in under 60 seconds — fully compliant with character limits and platform guidelines.
Visual Assets (Steps 9–14)
Visual assets are your conversion engine. A user who reaches your product page has already passed the keyword filter — now your screenshots, icon, and video need to convince them to tap "Install." Studies show that screenshots are the single biggest lever for conversion rate on both platforms, yet most developers spend 80% of their ASO time on keywords and 20% on visuals. Flip that ratio.
Step 9: 6–10 Screenshots Uploaded Per Device Size
Both Apple and Google allow up to 10 screenshots per device type. Use all available slots — there is no scenario where fewer screenshots convert better than more. Each screenshot should tell part of your app's story. Cover your primary features, key differentiators, and the moments that make users love your product.
Size requirements matter. For iOS, you need screenshots for at least the 6.7" iPhone (1290 x 2796 px). For Google Play, include phone screenshots plus 7" and 10" tablet sizes. A drag-and-drop screenshot builder makes producing assets for every device size fast and painless.
Step 10: First 3 Screenshots Show Key Value Proposition
Most users never scroll past the first three screenshots. These visible-without-scrolling frames need to answer one question: "What does this app do for me?" Lead with your strongest benefit, not your login screen or settings page. Use text overlays that communicate outcomes, not features — "Save 2 Hours Every Week" converts better than "Calendar Sync Feature."
Step 11: Screenshot Captions Contain Target Keywords
This is a new ranking factor in 2026. Both Apple and Google now index text overlays on screenshots for search relevance. That means the captions you add to your screenshots serve a dual purpose: they persuade users AND help you rank for additional keywords. A screenshot showing your workout tracking feature should have a caption like "Track Every Workout Automatically" rather than just "Feature 3."
Treat screenshot captions as an extension of your keyword strategy. Include your secondary and long-tail keywords naturally in the overlay text.
Step 12: App Icon Is Distinctive and Readable at Small Sizes
Your icon appears in search results, top charts, recommendations, and the home screen. It needs to be instantly recognizable at 29x29 pixels (the smallest rendering size) and visually distinctive against competitors. Use 1–2 colors maximum, avoid text or fine details, and test your icon against the top 10 results for your primary keyword. If your icon looks like everyone else's, you've lost your first impression.
Step 13: Preview Video Shows Core Functionality (First 3 Seconds)
On iOS, app preview videos autoplay silently in search results. On Google Play, the promo video appears at the top of your listing. In both cases, the first 3 seconds determine whether a user watches or scrolls past. Open with your most impressive feature or the key problem your app solves — not a logo animation or splash screen.
Keep videos under 20 seconds (even though Apple allows 30). Add captions since most users browse with sound off. Show the actual app UI in action, not conceptual animations.
Step 14: All Assets Follow Apple/Google Size Requirements
Rejected or incorrectly sized assets delay your launch and look unprofessional. Before submitting, verify every screenshot and video against current platform specifications. Apple requires specific dimensions per device class. Google Play has its own aspect ratio and resolution rules. Platform requirements change occasionally — check the latest guidelines with every submission, not just your first one.
Pro tip: Create professional screenshots for iPhone, iPad, and Android in minutes with AppDrift's free screenshot generator — no design skills required, no watermarks, no limits.
Localization (Steps 15–19)
Localization is the single most underused growth lever in ASO. Only 2% of developers fully localize their app store listings, yet apps localized in 10+ languages see an average 30% increase in downloads per locale. The math is straightforward: more languages means more addressable search queries means more installs.
Step 15: Localized in at Least 10 Languages
At minimum, localize your store listing in the top 10 languages by app store revenue: English, Japanese, Korean, Chinese (Simplified), German, French, Spanish, Portuguese (Brazil), Italian, and Russian. Each localization creates a separate set of indexed keywords, effectively multiplying your search surface area.
You don't need to localize the app itself to localize the store listing. Many successful apps run entirely in English but have fully localized metadata in 30+ languages. AI-powered translation tools make this process fast and affordable — what used to take a team a full week per locale now takes under an hour for all languages combined.
Step 16: Keywords Researched Per Locale (Not Just Translated)
Direct translation of keywords is one of the most common localization mistakes. The top search term in English is almost never the top search term in Japanese or Spanish. Each locale requires independent keyword research to identify what users in that market actually search for. A "calorie counter" app might need to target "calorie calculator" in German and "diet diary" in Korean.
Step 17: Screenshots Localized With Translated Captions
Localized screenshots with translated text overlays convert significantly better than English-only screenshots shown to non-English audiences. If your screenshot says "Track Your Progress" and the user speaks French, you've introduced friction. Replace the English caption with the French equivalent. This also helps with the new caption indexing factor discussed in Step 11.
Step 18: Cultural Adaptation Applied (Not Literal Translation)
Cultural adaptation goes beyond word-for-word translation. It means adjusting your messaging to resonate with local expectations, idioms, and conventions. A promotional message that works in the US might feel aggressive in Japan, where softer, more benefit-focused language performs better. Review tone, imagery references, and feature emphasis for each major market.
Step 19: Right-to-Left Languages Handled Correctly
If you're localizing into Arabic, Hebrew, Urdu, or Persian, ensure your screenshots and text layouts are properly mirrored for right-to-left reading. This includes flipping the visual flow of screenshot carousels, adjusting text alignment in captions, and ensuring UI elements in screenshots display correctly. RTL localization mistakes are immediately visible and signal low