ASOpatents.com compiles a list of patents that are likely used to shape the algorithms of the Apple App Store, Google Play Store, and other major platforms. While it's uncertain whether these patents are actually implemented in the algorithms, the site provides insights into potential clues about search results, recommended apps, and other data points.

US 2023/0095944 A1: How Apple’s search suggestion work?


US 2023/0095944 A1 is aimed specifically at Apple Pay/Wallet, but its core pattern—tag data on-device → index it locally → surface instant suggestions—closely resembles two App Store search features:

Trending searches (the 8–10 keywords that appear when you first open the Search tab)

“Search Hints” that autocomplete while you type

Apple never publishes a full search-ranking spec, yet several public clues point to a very similar architecture across Wallet, Mail, and the App Store:

SourceKey take-aways
Apple Developer “App Store search” pageMentions on-device models, natural-language queries, and app-level tags
iOS 18.1 (Oct 2024) release notes“Search the way you talk” slogan—full-sentence queries now work
2021 roll-out of “search suggestions”Auto-completes refine “food” → “delivery / recipes / games,” etc.
2024 ML paper (“On-Device Query Auto-Completion…”)Confirms on-device neural autocomplete (example given for Mail)
Apple Privacy ReportUses Differential Privacy to collect anonymized App Store metrics

Putting the pieces together, a likely flow is:

  1. User starts typing
    • The first characters are tokenized locally and run through an on-device autocomplete model, producing ultra-fast, private suggestions.
  2. Server-side re-ranking
    • Simultaneously, popularity data, Search Ads insights, and daily “trending” lists arrive from Apple’s servers. Stats are sanitized via Differential Privacy before being used.
  3. Tag & LLM layer
    • Each app now carries multi-word tags (“fitness • time-tracker • widget-support”) generated by Apple’s LLMs. These tags map natural-language queries to relevant apps and filter suggestions.
  4. Result merging
    • The device merges local candidates with server candidates, scores them on-device, and shows the list—without sending the full, raw query off the phone until the user hits Search.

So while the patent is not a one-to-one blueprint, the “on-device tagging + private, low-latency suggestions” principle is clearly reused in App Store search.


How App Store Search Suggestions Work (ASO View)

StageWhat actually happens?Why it matters for ASO
Trending keywordsRegion-specific list refreshed ~every 24 hSudden visibility spikes; rank if your app matches a hot term
Autocomplete / Search HintsML model combines typed prefix with high-probability multi-word phrasesLong-tail keywords are born here—exact matches in title/subtitle win
Natural-language intentLLM parses full sentences (“apps that help me learn Spanish”) into search tokensDescriptions with clear, semantically rich sentences feed the model
LLM-generated app tagsApple derives tags from your metadata and surfaces them on the product pageEnsure your metadata forms a coherent theme, or irrelevant tags hurt CTR
Ranking signalsText match + user behavior (install, retention, ratings) + core quality metricsRetention and star ratings now influence even autocomplete ranking
Search Ads overlayPaid ads can occupy a suggestion slot, labeled “Ad”Plan organic + paid in tandem; Search Match piggybacks on the same model

Practical Steps for Your App

Try deferred deep-links or promoted IAP: since iOS 18, search cards can show an IAP badge, lifting conversion by 5–8 %.

Place your two or three strongest keywords in the Title + Subtitle—autocomplete heavily weights the first ~28 characters.

In the 100-character keyword field, balance trending head terms with long-tail variants; log new suggestions often.

Write your Description in natural language (“Linearity Curve lets you create vector illustrations in seconds”) to reinforce LLM tags.

Optimize rating prompts; higher ★★★★☆–★★★★★ ratios boost your presence even inside autocomplete.

Track regional trends: in Turkey, weekend searches skew toward entertainment, weekdays toward productivity—adapt local ASA campaigns.

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