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App Store Search Algorithm
The proprietary ranking system used by Apple and Google to determine which apps appear in search results and in what order for any given keyword query.
The app store search algorithm is the system that decides which apps rank for which keywords. Neither Apple nor Google publicly disclose the exact workings of their algorithms, but ASO practitioners have identified the key signals through testing and analysis.
Known Ranking Factors
Apple App Store:
- App title and subtitle (highest text weight)
- Keyword field (high weight, hidden from users)
- Download velocity (recent download speed)
- Ratings and review volume
- Engagement metrics (retention, session data)
- Update recency
Google Play:
- App title (highest weight)
- Short description
- Full description (keyword presence and density)
- Download velocity
- Ratings, review volume, and review recency
- Engagement and retention signals
- Uninstall rate
Key Differences
Apple relies more on explicit metadata fields (title, subtitle, keyword field) for text relevance. Google indexes a much larger body of text (full description) and applies more natural language processing.
Both algorithms heavily weight non-text signals like download velocity and engagement, which means metadata optimization alone is not enough to rank. You need a product that users actually want.
Algorithm Updates
Both stores periodically update their algorithms. These updates can cause sudden ranking shifts. Monitoring keyword rankings daily with tools like ASODOG helps you detect algorithm changes early and adapt your strategy.