The Complete App Store Optimization (ASO) Guide

Keywords are the foundation of visibility. If you target keywords that nobody searches for, you get no impressions. If you target keywords that are too competitive, your app will get buried at position #150. A practical keyword research workflow consists of three distinct phases:

Phase 1: Keyword Discovery (Expansion)

Start by writing down the terms that describe what your app does (e.g., "workout planner", "gym tracker"). Expand this list by analyzing competitors: extract keywords from their titles and subtitles. Additionally, pay attention to the App Store Search autocomplete—as you type letters in the App Store search bar, note down the suggestions. These represent high-intent search paths real users take.

Phase 2: Evaluation (Relevance, Volume, and Difficulty)

For each keyword candidate, you must analyze three variables:

• Search Popularity (Volume): Apple publishes no search counts. Apple Ads shows a keyword’s search popularity on a 1 to 5 scale Apple. This site’s 0 to 100 traffic score is read from where a term sits in Apple’s autocomplete: an ordering between terms, never a count, so use it to compare terms rather than against a cutoff.
• Difficulty (Competition): Look at who holds the first page of results. Apple says popular terms “are highly competitive – especially if you are a newer or smaller app,” while less common terms “drive lower traffic, but are less competitive.” Apple
• Relevance: This is critical. If your app is a sleep sounds app, people searching "meditation app" want guided meditations, not ambient rain sounds. Apple also lists terms that are not relevant to the app as improper keyword use, a common reason for rejection.

Phase 3: Prioritization & Selection

Sort your keywords. Put the terms you most want to be found for in your App Name and Subtitle. Save long-tail, descriptive keywords (e.g., "rain sounds for sleeping free") for your 100-character keyword field.

Action Step: Save hours of manual compilation. Discover, filter, and score keywords instantly with our free app store keyword tool.

Placing the right keywords in the right fields determines where you index. Implement these optimization techniques with every metadata refresh:

While keywords get your app onto the search result screen, your creative assets decide whether the user taps "Get". Conversion rate optimization (CRO) is the catalyst of ASO.

The First Screenshots (Shown in Search)

Apple says that, depending on the orientation of your screenshots, “the first one to three images will appear in search results when no app preview is available.” Those are the screens most searchers judge you on. Apple

• Focus on benefits, not features: Instead of "SQL Database Integration," write "Sync Across All Devices Instantly."
• Large, readable text: Users scan results quickly on mobile. Make your copy huge and high-contrast, placing it at the top or bottom of the screen.
• Show actual UI: Keep app frames clean and clean up clutter. Use realistic, stylized layouts of your app's best interfaces.

App Preview Video Guidelines

An App Preview is a short video of your app in motion, up to 30 seconds long, and you can have up to three per language. Apple says previews “display and autoplay on your product page and within search results.” Apple

• Autoplays on mute: Apple says “by default, app previews play with the sound muted, so consider using copy to add additional context to your footage.”
• Hook in the first few seconds: Apple says to “make sure the first few seconds of your video are visually compelling.” Do not spend them on logo animations or title cards.

Design Review: Before publishing, see how your screenshots compare visually next to your top rivals in store layouts using the App Compare Tool.

Apple says ratings and reviews “influence how your app ranks in search and can encourage users to engage with your app from search results.” Your summary rating shows on your product page and in search results, and it is specific to each storefront. Apple

The Golden Rules of Review Prompts

App Review Guideline 5.6.1 says to “use the provided API to prompt users to review your app” and that Apple “will disallow custom review prompts.” That API is StoreKit’s (SKStoreReviewController, or RequestReviewAction in SwiftUI). Apple To prompt without frustrating people:

• Prompt during success states: Apple says to ask “when users are most likely to feel satisfaction with your app, such as when they’ve completed an action, level, or task.”
• Never interrupt: Apple says “make sure not to interrupt their activity.” Do not ask at startup or mid-task.
• Know the cap: Apple says “the system displays the review prompt to a user a maximum of three times within a 365-day period.” You choose when to ask; the system decides whether the prompt appears. Apple

Responding to Reviews

If a user leaves a 1-star review detailing a bug, reply politely explaining the fix. Apple says that when you respond, “the reviewer is notified and has the option to update their review,” and suggests prioritizing the lowest star ratings and reviews mentioning technical issues if you can’t reply to every one. Apple

Limiting your listing to English leaves most storefronts reading a language that is not their own. Apple says localizing your product page lets people in other regions understand your app more easily and “may make them more likely to download it.” Apple

Localization vs. Machine Translation

Never paste your keyword list into standard translation engines. Culturally relevant search intent varies wildly. For example, while US users might search for "sleep sounds", users in Germany might search for specific sleep therapies. Conduct localized keyword research for each target region.

The "Cross-Localization" Claim

A widely repeated ASO tip says a storefront’s search reads keywords from its other supported languages. Apple publishes which languages each storefront supports; it does not say search reads them. Apple

ASO is a continuous loop, not a one-time project. As seasonal trends change and competitors launch updates, the results for a term shift. Apple says to review search performance “on an ongoing basis to understand the impact of your metadata.” A typical iteration workflow looks like this:

1. Publish Update: Launch a metadata update with new target keywords.
2. Change one thing at a time: Apple publishes no indexing delay, so there is no fixed wait. Changing several things at once makes it impossible to tell which one moved a rank.
3. Monitor keyword positions: Track your search positions daily using a tracker like the Keyword Rank Checker.
4. Analyze and Pivot:
   • If it is on the first page: protect it, and keep the listing that searchers see strong.
   • If it sits just below the first page: consider whether it belongs in your name or subtitle, where people also read it. Apple publishes no weighting between fields, so measure after moving it.
   • If it never reaches the first page once you have measured it for a while: swap the word out in your next update.