Single Keyword vs. Keyword Phrase
In the App Store keyword field, single words are indexed individually and recombined by Apple's algorithm, which changes how you should weigh one broad word against a specific multi-word phrase.
Apple indexes each comma-separated entry in the keyword field as individual words, then can recombine words from across your name, subtitle, and keyword field to match multi-word searches. This means 'habit,tracker,daily,streak' can match a search for 'daily habit tracker' even though that exact phrase never appears together anywhere in your metadata.
This recombination is why single high-value words often cover more ground per character than a full phrase repeated verbatim. Four single words at roughly 20 characters can contribute to dozens of possible search combinations; the same 20 characters spent on one fixed phrase covers only that phrase.
The exception is when a specific phrase has meaningfully different demand or difficulty than its component words scored separately — a distinct niche phrase worth targeting directly rather than assuming recombination will produce it.
Frequently asked questions
- Should I ever put a full phrase in the keyword field instead of separate words?
- Only when that exact phrase has real, distinct demand you've confirmed by scoring it directly. Otherwise, separate words generally cover more possible searches for the same character cost.
Related terms
- Keyword CannibalizationKeyword cannibalization in ASO occurs when an app's multiple metadata fields target the same keyword, wasting limited character space rather than covering additional search terms.
- Long-Tail KeywordsLong-tail keywords are multi-word, specific search phrases that individually have lower search volume than broad terms but collectively cover the majority of App Store searches and often have much lower ranking difficulty.
- Plural and Singular KeywordsApple's App Store search treats common plural and singular forms of a word as equivalent for most terms, which means including both usually wastes character space rather than adding coverage.
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Put this into practice
Score App Store keywords by popularity and difficulty across 109 storefronts — the numbers behind single keyword vs. keyword phrase.
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