ASO Glossary
Plain-English definitions for every term used in App Store Optimization. Bookmark and share.
Metrics
- App rating
The star average displayed on your App Store listing, typically out of 5.
- Category rank
Your app's ranking within its assigned App Store category, separate from keywords.
- Chance score
A composite metric combining keyword volume, competition, and your current rank.
- Conversion rate
The percentage of viewers of your App Store listing who tap the install button.
- Install velocity
The rate of installs per unit time, the strongest ranking signal both stores use.
- Keyword rank
Your app's position in the App Store or Google Play search results for a specific keyword.
- Rating count
The total number of ratings your app has received, also displayed on the listing.
- Review
A written customer comment paired with a star rating, displayed on your listing.
- Review velocity
New reviews received per day, a strong proxy for install momentum.
- Top charts
The publicly-listed rankings of the most-downloaded apps in each category, shown in the Apps and Games tabs.
Metadata fields
- App icon
The visual identity that appears in search results, charts, and on the home screen.
- App metadata
The text and visual fields you control on your App Store / Play Store listing.
- App name
Your app's primary name shown under the icon, the highest-weighted field for keyword ranking.
- App video preview
A 30-second video that auto-plays on your App Store listing, used by ~40% of top apps.
- Keyword field (Apple)
A hidden 100-character field where you can list comma-separated keywords visible only to Apple's search algorithm.
- Screenshots
The image carousel on your App Store listing — the largest single conversion-rate lever in ASO.
- Subtitle (Apple)
A 30-character secondary headline below your app name on the App Store, indexable for search.
Tactics
- Keyword difficulty
A 0-100 score estimating how hard it would be to rank in the top 10 for a keyword.
- Localization
Translating your app metadata, screenshots, and in-app content for non-native-language markets.
- Organic vs. paid installs
The breakdown of installs that come from search/discovery (organic) vs. ads (paid).
- Product Page Optimization
Apple's native A/B testing feature for App Store listing variants.
- Search volume
The estimated number of monthly searches for a keyword in a specific storefront.
- Sentiment analysis
Automated classification of review text into positive, neutral, or negative.
Platform
- App ID / Bundle ID
The unique identifier for an app on each store — Bundle ID on Apple, package name on Google.
- App Store Connect
Apple's portal for managing your app, viewing analytics, and submitting metadata.
- Apple Search Ads
Apple's paid advertising platform for the App Store, often the highest-converting paid channel for mobile.
- ASO (App Store Optimization)
The practice of improving an app's visibility and conversion rate within the App Store and Google Play.
- Google Play Console
Google's portal for managing your Android app, equivalent to App Store Connect.
- Metadata rejection
When Apple or Google rejects your app submission for keyword stuffing, misleading copy, or prohibited content.
- Storefront
A country-specific instance of the App Store or Google Play with localized content and rankings.