ASO Metadata Checklist: Everything You Need to Optimize Before Publishing

Before you hit publish on your next App Store update, run through this checklist. With over 2 million apps competing for visibility in 2026, metadata mistakes aren't just annoying — they can lock you into low rankings for months and cost you real downloads. The good news is this whole process takes 20–30 minutes. The bad news? Most teams skip it.

TL;DR: The App Store title carries the highest ranking weight (roughly 100% relative to other fields), and 65% of all downloads originate from organic search (MobileAction, 2026). Run this checklist before every submission — it covers the five metadata fields that actually determine your visibility and conversion rate.

Does Your App Title Do Enough? (30 characters)

The title is your single most powerful ranking lever. Incorporating a primary keyword in your title can increase ranking position by up to 10.3% compared to a brand-name-only title (Stormy AI, 2026). Every character counts — there are no free spaces here.

• Contains your single most important keyword
• Brand name is present (either first or last — not buried in the middle)
• Reads naturally — no keyword stuffing
• Differentiates from direct competitors
• Works in context: search results, category page, and featured placement

One test worth running: search your target keyword in the App Store and read your title alongside the top 5 results. Does it stand out, or blend in? That 10-second check reveals more than most keyword tools.

Is Your Subtitle Earning Its 30 Characters?

The subtitle carries roughly 90% of the ranking weight of the title — almost as powerful, but often treated as an afterthought (MobileAction, 2026). Users see both fields together in search results, so write them as a pair.

• Contains your second-most-important keyword cluster
• Complements — doesn't repeat — title keywords
• Adds a benefit or USP the title doesn't cover
• Still readable as a standalone sentence fragment

Title + Subtitle read together. Apple displays both in search results. If your subtitle simply echoes your title's keywords, you've wasted your strongest ranking opportunity.

Citation capsule: The app subtitle field carries approximately 90% of the ranking weight of the title, making it the second-highest-value metadata field in the App Store. Apps that use distinct keyword clusters across title and subtitle — rather than repeating terms — maximize their total indexed keyword surface (MobileAction, 2026).

Is Your Keyword Field Fully Optimized? (100 characters, iOS only)

The keyword field carries around 60% of the ranking weight of the title — meaningful, but only if you use all 100 characters without overlap (Stormy AI, 2026). Localized keywords also boost international downloads by 45%, so don't treat this as a one-size-fits-all field.

• No spaces — use commas as separators only
• No keywords already in title or subtitle (wasted characters)
• No plural forms if the singular is already covered
• No competitor brand names (policy violation)
• No trademarked terms you don't own
• Mix of volume tiers: 2–3 high volume + 6–8 medium + niche
• Localized per market — don't reuse English keywords in Japanese

Quick Character Counter

function countKeywordChars(keywords: string[]): number {
  return keywords.join(",").length;
}

const myKeywords = ["photo editor", "background remover", "collage maker"];
console.log(countKeywordChars(myKeywords)); // 42 — room for more

Hitting 95–100 characters consistently is a simple optimization most teams leave on the table. Count before every submission.

Citation capsule: Localized keywords boost international downloads by 45%, and apps that fully utilize all 100 characters in the keyword field — without repeating terms from the title or subtitle — significantly outperform those that leave characters unused (Stormy AI, 2026). Localization per market (not just translation) is the key lever.

Is Your Description Above the Fold Worth Reading?

Unlike the keyword field, the description is not indexed by Apple's ranking algorithm. Its job is pure conversion — turning visitors into installs. Users spend only 7 seconds on a product page before deciding whether to download (AppDrift, 2025), so the first 2–3 sentences carry almost all the weight.

• First 2–3 sentences deliver a compelling value proposition (above the "more" fold)
• Core benefit is clear within 10 seconds of reading
• Social proof included: downloads, ratings, or press mentions
• CTA at the end — low impact on iOS, but sets expectations
• No keyword stuffing (it doesn't help rankings)
• Localized by humans — not auto-translated

What loses people fastest: leading with company history or award badges. What converts: a specific outcome the user will experience in the first 5 minutes.

Are Your Screenshots Doing Their Job? (Up to 10)

Screenshots are the highest-conversion lever on your product page — period. With only 7 seconds of user attention and most people not scrolling past screenshot 3, your first image is effectively your entire pitch. Apps that A/B tested screenshots at least twice in 2024 consistently outperformed those that didn't; among top iOS apps, 49% updated screenshots at least twice that year (Apptweak, 2025).

One more thing: since 2025, Apple uses OCR to index visible text within screenshots, meaning caption keywords now affect both discovery and conversion simultaneously.

• First screenshot communicates core value prop without any reading required
• Sequence tells a story: problem → solution → outcome
• Device frames used consistently (or not at all — don't mix)
• Text is large enough to read in search results at thumbnail size
• Correct sizes for each device type submitted
• Portrait vs. landscape decision is intentional and consistent
• Screenshot captions include target keywords (OCR-indexed since 2025)

Citation capsule: As of 2025, Apple applies OCR (optical character recognition) to index visible text in screenshots for App Store search. This means screenshot captions now serve two purposes: driving discovery through keyword indexing and converting users through visual storytelling (AppScreenshotStudio, 2026). Top-performing apps updated screenshots twice or more in 2024.

Should You Add a Preview Video?

Preview videos are genuinely optional — the data is mixed. One test by StoreMaven found that adding a video as the first asset produced only a 3% conversion lift, and in some cases the original page without video outperformed the video variant (StoreMaven, 2024). That said, users who watch and install tend to have better retention because they arrive with realistic expectations.

Worth adding if your app has a strong visual experience. Worth skipping if your first screenshot already communicates your value prop instantly.

• Autoplay-friendly — compelling first 3 seconds without sound
• Shows real app usage, not an animated marketing piece
• Correct resolution and duration (15–30 seconds recommended)
• Captions for accessibility and muted autoplay

Is Your Localization Strategy Maximizing Reach?

Apps that localize their metadata see at least 38% more organic downloads than English-only versions — and in some markets, adding a native language has driven 128% more downloads per country (ASOWorld, 2025). The revenue impact is just as real: localization adds roughly 26% revenue per country.

The critical mistake most teams make is translating English keywords into other languages. Japanese users don't search the way American users do. Korean searches have different intent patterns. Adaptation — not translation — is what drives results.

For each supported locale:

• Title adapted (not just translated) for local search behavior
• Keywords regenerated in the target language — not translated from English
• Screenshots localized with native language UI
• Description written by or reviewed by a native speaker

Priority Markets

Citation capsule: Localized apps generate at least 38% more organic downloads than English-only versions, with some apps seeing 128% download increases per country after adding native-language metadata (ASOWorld, 2025). Adapting keywords to local search vocabulary — rather than translating English terms — is the key distinction between effective and ineffective localization.

Final Pre-Submit Checks

• All metadata passes character limits (use a counter — don't eyeball it)
• No App Store prohibited content in keywords
• No broken links in the description
• Promo text updated if running a seasonal promotion
• Version notes are clear and compelling — users read these before updating

One thing teams consistently underestimate: version notes. They're the only metadata that updates with every release, and users do read them before deciding whether to update. Treat them as a micro-conversion moment.

Frequently Asked Questions

Does the App Store description affect keyword rankings?

No — Apple does not index the description field for keyword rankings. Its sole function is conversion: convincing users to download after they land on your product page. Keyword stuffing in the description wastes copy space and hurts readability without any ranking benefit.

How often should I update my App Store metadata?

Run this checklist before every submission. For screenshots specifically, 49% of top iOS apps updated theirs at least twice in 2024. For keywords, revisit your field whenever you ship a significant feature update or notice a ranking drop — markets shift, and competitors do too.

Can I use competitor app names in my keyword field?

No. Including competitor brand names in your keyword field violates Apple's App Store Review Guidelines and can result in your update being rejected or your app being removed. Target category terms and user intent phrases instead.

Is localization worth the effort for a small team?

Yes — particularly because the minimum viable effort is low. Localizing just your title, subtitle, and keyword field (about 160 characters total) is often enough to open a new market. With localized metadata driving 45% more international downloads on average, the ROI is strong even for resource-constrained teams.

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Running this checklist takes 20–30 minutes. Skipping it can cost you months of ranking recovery. Want to go deeper? Use AI to generate and score metadata variants before you submit, and read our Apple Search Ads guide to align your paid and organic keyword strategies.