App Store Keyword Research: A 2026 Guide for iOS & Android

Most app keyword advice skips the part that matters: the two stores index keywords in completely different ways. If you research and optimize the same way for both, you waste half your effort. Start by understanding the mechanics, then do the research, then map it to your listing.

How Apple App Store keyword indexing works

Apple builds your searchable index from three places: the app name (up to 30 characters), the subtitle (up to 30 characters), and a hidden keyword field (up to 100 characters). The keyword field is a comma-separated list — no spaces after commas, because spaces count as characters. The long description is not indexed for search on iOS.

Two rules follow from this. First, do not repeat a word that already appears in your name or subtitle inside the keyword field — Apple already has it. Second, you do not need to include plurals or obvious word combinations; Apple combines individual keywords into phrases automatically. Packing 100 characters with unique, relevant single words almost always beats stuffing a few long phrases.

How Google Play keyword indexing works

Google Play has no hidden keyword field. Instead it indexes the full text of your title (30 characters), short description (80 characters), and long description (4,000 characters). That makes Play closer to traditional SEO: keyword placement, repetition in moderation, and natural phrasing in the description all matter.

A good rule of thumb is to mention your most important keyword a handful of times across the description without it reading like spam. Keyword stuffing can trigger policy issues and hurts conversion when real users read it.

Building your keyword list

Start broad, then filter for relevance and intent. A practical sourcing process:

1. Brainstorm the words you would use to describe your app to a friend.
2. Add the categories and core features users would search for.
3. Mine competitor listings — their names, subtitles, and descriptions reveal targets.
4. Use App Store search autocomplete to capture how real users phrase queries.
5. Group the result into themes (core, feature, competitor, long-tail).

Apple keywords vs. Google Play keywords in practice

On iOS, spend your research output on the 100-character field: a tight, comma-separated list of unique, relevant single words, with no duplicates of your name or subtitle. On Android, weave the same research into a readable short and long description, leading with your strongest term in the title and short description.

One more lever Apple gives you for free: localizations. Each localization you add comes with its own name, subtitle, and keyword field — even some English-speaking storefronts (like the UK and Australia) can be optimized separately to expand your indexed keyword footprint. Localizing your listing is one of the most underused ASO tactics.

Track, then iterate

Keyword research is not a one-time task. Rankings move as competitors update listings and as the stores re-index. Track your target keywords weekly, watch which ones gain or lose position, and reinvest the 100-character field in terms that are actually moving.

The Keyword Monitor tracks your App Store keyword rankings daily across countries, with 7- and 30-day deltas and full SERP context — it can auto-detect what you already rank for and mine competitor listings for new targets. Pair it with the ASO Copy Generator to turn your keyword list into store-ready titles, subtitles, and descriptions.

Keep reading

For the wider picture, see the ASO 2026 Guide and ASO Best Practices, or jump straight to the App Store Optimization workflow overview.