App Store Optimization (ASO) Checklist for 2026

App Store Optimization is not a one-time task — it is an ongoing practice that requires attention across dozens of factors. Missing even one critical element can hold back your app's visibility and conversion rate.

This checklist covers every ASO factor that matters in 2026. Use it as a launch checklist, a quarterly audit tool, or a roadmap for improving your existing listing. Each item links to actionable advice and tools to get it done.

Keywords and Search Optimization

Getting found is the first step. These items ensure your app appears when users search for relevant terms.

App Title

• Your primary keyword is in your app title. The title carries the highest keyword weight on both platforms. Example: "Pennies - Budget and Expense Tracker" rather than just "Pennies."
• Title is under 30 characters (Apple and Google limit). Every character counts — do not waste space on filler words like "the" or "app."
• Title is readable and brandable. Keyword stuffing hurts conversion even if it helps ranking. Find the balance.

Subtitle (Apple) / Short Description (Google)

• Contains your second-priority keywords. Do not repeat title keywords here — use this space to cover additional search terms.
• Communicates a clear value proposition. This appears in search results on Apple — make it count.
• Under 30 characters (Apple) / 80 characters (Google).

Keywords Field (Apple Only)

• All 100 characters are used. Separate with commas, no spaces after commas.
• No repeated words. Words in your title and subtitle are already indexed — do not waste keyword field characters repeating them.
• Includes singular and plural variations strategically. Apple indexes both forms, but including the less obvious one can help.
• Competitor names considered. Users searching for competitors may discover your app. Use judiciously.
• Keywords are researched, not guessed. Use tools like AppTweak, Sensor Tower, or Apple Search Ads keyword planner.

Full Description (Google Only)

• Primary keywords appear naturally in the first paragraph. Google indexes your full description for search.
• Keywords are distributed throughout the description without stuffing.
• Description is the full 4000 characters (or close to it). Longer descriptions have more keyword surface area.
• Not keyword-stuffed. Google penalizes unnatural keyword density. Write for humans first.

For a deeper dive into keyword strategy, read our ASO Guide for Indie Developers.

Visual Assets: Screenshots

Your screenshots are the single most important conversion factor. These items ensure they are working as hard as possible.

Screenshot Content

• First screenshot shows your core value proposition. This appears in search results — it is your billboard.
• Each screenshot communicates a different benefit. No redundancy. Map each screenshot to a specific user need.
• Screenshots show the actual app with realistic data. No empty states, placeholder text, or onboarding screens.
• Captions are benefit-focused, not feature labels. "Never Miss a Deadline" not "Calendar View." See our caption writing guide for formulas.
• Caption text is readable at thumbnail size. Bold, large font, high contrast. Test at 300px wide.
• You are using all available screenshot slots (up to 10 on Apple, 8 on Google).

Screenshot Design

• Visual design is consistent across all screenshots. Same colors, fonts, layout grid, and style.
• Professional quality — not raw simulator captures. Use StoreShots to generate professional screenshots.
• Device frames are current. If you use device frames, they should show the latest devices.
• Screenshots match your current app version. Update them whenever your UI changes significantly.

Screenshot Sizing

• iPhone 16 Pro Max (6.9-inch) screenshots provided at 1320 x 2868 pixels.
• iPad Pro 13-inch screenshots provided at 2064 x 2752 pixels (if your app supports iPad). Use StoreShots resize to convert from iPhone.
• Google Play phone screenshots provided at recommended 1080 x 1920 or higher.
• Google Play tablet screenshots provided if applicable.

For complete size specifications, see our App Store screenshot sizes guide and Google Play screenshot sizes guide.

Screenshot Localization

• Screenshots are localized for your top 3-5 markets. At minimum: Japanese, Korean, German, and French.
• Captions are culturally adapted, not just translated. Direct translations often miss the mark.
• UI text in screenshots matches the app's localization for that language.
• Use [StoreShots translate](/dashboard/translate) to handle screenshot localization at scale.

Read our guide on designing screenshots for multiple countries for cultural adaptation strategies.

Visual Assets: App Icon

Your icon appears everywhere and is a critical factor in both search results and brand recognition.

• Icon is simple and recognizable at 29x29 points. If it is not clear at small sizes, simplify.
• Icon uses distinctive colors that stand out from competitors in your category.
• No text in the icon. Text is unreadable at small sizes and looks amateurish.
• Icon style matches your screenshots. Cohesive brand identity across all assets.
• Icon is submitted at correct size: 1024 x 1024 (Apple), 512 x 512 (Google).
• You have A/B tested your icon using Product Page Optimization or Store Listing Experiments.

Need an icon? Generate one with AI using StoreShots.

Visual Assets: Additional

App Preview Video (Apple) / Promo Video (Google)

• Video exists — listings with video tend to convert better.
• Video is under 30 seconds and shows the app in action.
• First 3 seconds are compelling — most users do not watch the full video.
• Video autoplays on mute on Apple — ensure it communicates without sound.

Feature Graphic (Google Only)

• Feature graphic is provided at 1024 x 500 pixels.
• Key content is within the safe zone (center 900 x 400 area).
• Visual style matches your screenshots and icon.
• Headline is clear and readable at small sizes.

For complete feature graphic guidance, read our Google Play feature graphic design guide.

App Description

Apple App Store Description

• First 3 lines contain your strongest value proposition. Only these are visible without tapping "more."
• Description uses short paragraphs and bullet points for scannability.
• Social proof is included (awards, press mentions, user counts) if available.
• No keyword stuffing — Apple does not index the description for search, so write purely for conversion.

Google Play Description

• Primary keywords in the first paragraph. Google indexes this for search.
• Natural keyword distribution throughout the full description.
• Structured with headings and bullet points for readability.
• Close to the 4000-character limit for maximum keyword coverage.
• What's New section is current and reflects the latest update.

Ratings and Reviews

Your rating is both a ranking factor and a conversion factor.

• Current rating is 4.0 or higher. Below 4.0 significantly hurts conversion.
• Review prompt is implemented using SKStoreReviewController (Apple) or the in-app review API (Google).
• Review prompt triggers after a positive moment — task completion, achievement, or milestone.
• Review prompt does NOT trigger during onboarding, after errors, or on first launch.
• You respond to negative reviews. This shows engagement and can change perceptions.
• Critical bugs are fixed quickly to prevent rating drops.

Localization

Localization is the most underutilized ASO strategy with the highest ROI.

• App title and subtitle are localized for your top markets.
• Keywords are researched independently for each locale — not just translated from English.
• Screenshots are localized with StoreShots translate.
• Description is localized for at least Tier 1 markets (Japanese, Korean, Chinese, German).
• What's New text is localized.
• You are tracking per-country metrics to measure localization ROI.

Technical ASO Factors

These behind-the-scenes factors affect your visibility.

• App size is optimized. Smaller apps have higher conversion rates, especially in emerging markets with slower connections.
• Crash rate is low. High crash rates negatively impact search rankings.
• App is compatible with the latest OS versions.
• Update frequency is regular (at least every 2-3 months). Stale apps get deprioritized.
• Deep links and App Clips (Apple) are implemented where relevant.

Competitive Analysis

• You have analyzed the top 5 competitors' listings. Look at their keywords, screenshots, descriptions, and ratings.
• Your screenshots differentiate from competitors rather than blending in.
• You monitor competitor keyword changes and ranking shifts.
• Your value proposition is clearly different from competitors in your first screenshot and description.

Testing and Iteration

ASO is never "done." These items ensure you are continuously improving.

• You are running A/B tests on screenshots using PPO (Apple) or Store Listing Experiments (Google). See our A/B testing guide.
• You review ASO metrics monthly: impressions, page views, conversion rate, keyword rankings.
• Keywords are updated at least quarterly based on performance data.
• Screenshots are refreshed when conversion rate declines or after major app updates.
• You keep a testing log documenting what you tested, results, and learnings.

Launch Week Checklist

If you are launching a new app, prioritize these in the first week:

1. Keyword-optimized title and subtitle published
2. All screenshot slots filled with professional, captioned screenshots — generate with StoreShots
3. App icon tested and published
4. Description written and optimized
5. Review prompt implemented (trigger after first positive experience)
6. Feature graphic uploaded (Google Play)
7. Screenshots localized for top 3 markets — translate with StoreShots
8. Baseline metrics established for future comparison

Quarterly Audit Checklist

Every three months, run through these items:

1. Review keyword performance and update underperforming keywords
2. Check conversion rate trends — investigate any declines
3. Verify screenshots match current app UI
4. Review and respond to recent reviews
5. Analyze competitor listing changes
6. Run a new A/B test on screenshots or icon
7. Evaluate localization opportunities for new markets
8. Update description if features have changed

Conclusion

ASO is a broad discipline with many moving parts, but this checklist gives you a systematic way to ensure nothing falls through the cracks. You do not need to tackle everything at once — start with the highest-impact items (keywords, screenshots, and your first localization) and work through the rest over time.

The tools available in 2026 make ASO more accessible than ever. StoreShots handles your screenshot generation, localization, device resizing, and icon creation — letting you focus on the strategic decisions while AI handles the production work.

Bookmark this checklist and revisit it every quarter. Consistent attention to ASO compounds into significant, sustainable growth.

For topic-specific deep dives, explore our guides on screenshot mistakes to avoid, writing great captions, and screenshot sizes for every device.