How to Do Keyword Research for Your Mobile App

Why Keyword Research Is the Foundation of ASO

Every app store download starts with a search. On the App Store, 65% of downloads come directly from search. On Google Play, the number is similar. If you're not ranking for the right keywords, you're invisible.

Keyword research tells you exactly what your potential users are typing into the search bar — and which of those terms you can realistically rank for.

Step 1: Brainstorm Seed Keywords

Start with the basics. Write down:

• What your app does — "meditation", "budget tracker", "photo editor"
• Problems it solves — "reduce stress", "save money", "remove background"
• Who it's for — "meditation for beginners", "student budget app"
• Features — "sleep sounds", "expense categories", "filters"

Aim for 20-30 seed keywords. Don't filter yet — quantity first.

Step 2: Expand With Autocomplete

Both app stores have autocomplete that reveals what users actually search for:

1. Open the App Store or Google Play
2. Type each seed keyword and note the suggestions
3. These suggestions are sorted by popularity — the first suggestion gets the most searches

For example, typing "meditation" might show:

• meditation app
• meditation timer
• meditation for sleep
• meditation music
• meditation for anxiety

Each of these is a validated keyword that real users search for.

Step 3: Analyze the Competition

For each keyword, look at what's currently ranking:

• How many apps are competing for this keyword?
• How strong are the top results? (big brands vs. indie apps)
• Is there a gap you can fill?

A keyword like "meditation" has massive volume but fierce competition. "Meditation timer for runners" has less volume but you might rank on page one immediately.

The sweet spot: medium volume + low competition keywords.

Step 4: Check Your Current Keyword Density

Use our free Keyword Density Checker to analyze your current listing:

• Paste your app's title, subtitle, and description
• See which keywords appear most frequently
• Identify missing high-value keywords
• Check if you're within character limits

Step 5: Prioritize Your Keywords

Score each keyword on two axes:

• Relevance (1-5): How closely does it match what your app does?
• Opportunity (1-5): Can you realistically rank for it?

Focus on keywords that score high on both. A perfectly relevant keyword you can't rank for is useless. A keyword you can rank for but doesn't match your app will get downloads that immediately uninstall.

Step 6: Place Keywords Strategically

Not all metadata fields carry equal weight:

1. Title — highest ranking weight (put your #1 keyword here)
2. Subtitle (iOS) — second highest (use your #2-3 keywords)
3. Keyword field (iOS) — indexed but hidden (use remaining keywords)
4. Short description (Android) — visible and indexed
5. Long description (Android only) — indexed, include keywords naturally

Key Rules

• Never repeat keywords across fields — Apple counts them once regardless
• Use singular forms in the keyword field — Apple handles plurals
• Separate with commas, no spaces in the iOS keyword field
• Write naturally in descriptions — keyword stuffing hurts conversion

Step 7: Monitor and Iterate

Keyword research isn't a one-time task:

• Check rankings weekly for your target keywords
• Update keywords monthly based on performance data
• Watch for seasonal trends — "gift" keywords spike in December
• Monitor competitors — if they change keywords, you should know

Free vs Paid Keyword Research

Free Methods

• App store autocomplete suggestions
• Google Trends for relative interest
• Our Keyword Density Checker to analyze listings
• Competitor listing analysis (read their metadata)

Paid Tools (Starting at $9/mo)

• Search volume estimates
• Keyword difficulty scores
• Competitor keyword tracking
• Historical ranking data
• Keyword suggestions based on your app

Common Keyword Research Mistakes

Even experienced developers fall into these traps:

Chasing head terms only

"Fitness" or "photo editor" look tempting because of their volume, but as an indie app you will sit on page five behind entrenched brands. Long-tail phrases like "fitness tracker for seniors" or "photo editor for real estate" convert better precisely because they match a specific intent.

Optimizing for keywords your app can't deliver on

If you rank for "free video editor" but your editor is paywalled after one export, you'll get downloads followed by uninstalls and angry reviews. The algorithm notices poor retention on a keyword and quietly demotes you. Relevance beats volume every time.

Copying a competitor's keywords wholesale

Competitor listings are a research input, not a strategy. A big competitor can rank for broad terms because of their download velocity and review count — you can't. Use their metadata to find gaps they've ignored, not to mirror their choices.

Ignoring the "also searched for" behavior

Users rarely search once. They search, scan results, refine, and search again. Cover the refinement terms ("meditation sleep", "meditation offline", "meditation no subscription") in your subtitle and keyword field so you appear at multiple points in that journey.

Set-and-forget metadata

Search behavior shifts with OS releases, trends, and seasons. A keyword set that worked at launch can slowly decay. Revisit it on a fixed cadence — monthly is a reasonable rhythm for most indie apps.

A Keyword Placement Checklist

Before you submit your next metadata update, run through this:

• Title contains your single most important keyword, near the front
• Subtitle (iOS) uses your #2 and #3 keywords without repeating title words
• iOS keyword field uses all 100 characters, comma-separated, no spaces
• No keyword appears in more than one field
• Singular forms only in the keyword field
• Android short description reads naturally and includes your top 2 keywords
• Android long description mentions core keywords a few times, in real sentences
• No competitor brand names in your metadata (rejection risk)
• Metadata reads like something a human wrote, not a keyword list
• You ran the listing through the Listing Analyzer before submitting

How Keyword Research Differs by Store

The two stores index different fields, so your research output should map differently:

• App Store: Only the title, subtitle, and keyword field are indexed. Your description affects conversion, not ranking. This makes every one of those ~160 indexed characters precious — spend them like money.
• Google Play: The description is indexed. Google's algorithm reads it more like a web page, so natural, well-structured text with your keywords woven in matters. Repeating a key phrase a handful of times across a long description helps; stuffing it dozens of times hurts.

This also changes how you validate. On iOS, test title/subtitle changes and watch keyword rankings over 2-4 weeks. On Android, description edits can shift rankings too, so change one variable at a time or you won't know what worked. If you want a deeper look at judging which keywords are winnable, see our guide to keyword difficulty.

FAQ

How many keywords should I target? Realistically, an indie app can actively target 15-25 keywords across title, subtitle, and keyword field. Track your top 10 closely; let the rest be opportunistic.

How long until a keyword change shows results? Rankings typically settle within one to three weeks after an update goes live. Don't judge a change in the first few days — early movement is noisy.

Should my app name itself be a keyword? A brandable name plus a keyword-rich suffix is the standard indie pattern: "Flow: Budget & Expense Tracker". Pure keyword names look spammy and are harder to defend as a brand later.

Do misspellings and plurals matter? Apple handles common plurals and close misspellings, so don't waste keyword-field characters on them. Google Play is similarly forgiving. Spend those characters on genuinely different terms.

Is the keyword field really invisible to users? Yes — on iOS it's metadata only. That's why it's the right home for awkward terms you'd never put in a customer-facing title.

Quick Wins You Can Do Today

1. Check your title — does it include your most important keyword?
2. Analyze autocomplete — spend 15 minutes noting suggestions
3. Run our Keyword Density Checker on your listing — it takes 30 seconds
4. Fill your iOS keyword field completely — use all 100 characters
5. Read competitor listings — what keywords are they targeting?

Keyword research is the highest-ROI activity in ASO. An hour of research can lead to thousands of additional organic downloads over time.

Once your keywords are set, the next battle is conversion — good rankings are wasted if browsers don't download. Start with your screenshots, then run a free ASO audit to see how your whole listing stacks up.