ASO Fundamentals

ASO Keyword Stuffing: What Gets You Banned (and What's Safe in 2026)

The line between aggressive ASO and policy violations. What Apple and Google actually penalize, what they let slide, and how to be aggressive on keywords without risking your app.

ASOhack TeamMay 19, 20266 min read

There's a real tension in ASO between "use every available keyword" and "don't get your app rejected." Most ASO tutorials err one direction (vague "be natural") or the other (aggressive stuffing).

This post draws the actual line based on Apple's and Google's published guidelines, recent enforcement patterns, and what we've seen across thousands of audited listings.

The hard rejections

Apple and Google will reject for:

1. Competitor brand names in your metadata

"Better than Notion" in your description = rejection. Notion's name in your keywords field = rejection. Even subtle: "an alternative to [BrandName]" gets flagged.

Workaround: in screenshot captions, you have slightly more latitude in some categories — but still risky.

2. Comma-stuffing all your keywords into the title

iOS: title is 30 chars. Some apps cram it like "Workout Planner, Habit, Routine" — looks spammy, often rejected as 2.3 misleading metadata.

3. Listing "categories" you don't deliver

If your title or subtitle says "Free Premium Subscription" or "100% Free" but you have a subscription paywall, that's misleading. Rejected as 2.3.

4. Fake or misleading star/rating claims

"#1 Rated Workout App" in your screenshots when you have a 3.8 average = rejection.

5. Awards / press claims you don't have

"Featured in TechCrunch" when you weren't = rejection.

6. Hidden keywords in the description for SEO

Hiding keyword lists in white-on-white text, at the end of the description, or in long-tail "also known as" lists. Apple often catches this.

7. Repetitive single-word inflation

Apple's algorithm penalizes apps that repeat the same keyword 5+ times in the description. This isn't a hard reject, but it suppresses your search ranking.

The soft penalties (no rejection, but ranking suppression)

1. Long-tail keyword stuffing in description

Apple no longer indexes the description for search ranking on iOS (Google Play still does). So stuffing the description doesn't help on iOS — but it doesn't actively hurt for ranking either.

The risk: a suspicious-looking description can flag you for manual review on update, slowing release cycles.

2. Title overload (3+ category keywords)

"Workout Tracker - Fitness, Yoga, Cardio, Pilates, HIIT" in a 30-char title is hard to do, but apps try. Apple's recent enforcement penalizes obvious stuffing in title.

3. Plurals + singulars in keywords field

iOS keywords field is 100 characters. Stuffing both "workout" and "workouts" wastes 8 characters because Apple indexes both forms from one entry.

This isn't a penalty — it's just wasted space. But it signals an unsophisticated ASO setup.

What's safe and effective

1. Use the keywords field aggressively (iOS)

The 100-char keywords field is invisible to users. Apple has explicitly said you can use it without worrying about reading naturally.

Rules:

Comma-separated, no spaces.
No plurals if singular is already there.
No competitor brand names.
No words already in title (Apple indexes them).
No words already in subtitle (Apple indexes them).
Compress: "fitness,workout,gym,exercise,strength,cardio,hiit" not "fitness workout gym".

This is the most under-used legitimate keyword surface.

2. Pack the description with keywords (Google Play only)

For Android, the long description IS indexed for search. Use keywords 2-3× across the description, woven into natural sentences.

Don't overdo it: 5+ repeats of the same word triggers Google's spam detection.

3. Subtitle (iOS) as bonus keyword space

Subtitle is 30 chars and Apple indexes it. Use different keywords than the title:

Title: "Workout Planner"
Subtitle: "Fitness & Strength Training"

Now you're ranking for: workout, planner, fitness, strength, training — five different keywords.

4. Localize keywords per market

Each localization has its own keywords field, title, subtitle. Don't translate — re-do keyword research per market.

100 chars × N markets = lots of indexed keywords.

See App Store Localization Guide.

5. Update keywords between releases

iOS lets you change keywords with each version submission (no need for a major release). Update keywords to test what ranks.

What Google Play differs on

Google Play doesn't have an iOS-style keywords field. Instead:

Short description (80 chars) is heavily indexed.
Long description (4,000 chars) is indexed.
Title (30 chars, sometimes 50) is heavily weighted.

Workflow for Google Play:

Use short description like an iOS subtitle (high-weight keyword space).
In long description, use top keywords 2-3 times in natural sentences.
Avoid keyword lists or bullet stuffing.

What gets you re-rejected after an "iffy" pass

Sometimes you get through review with borderline tactics. Then:

The next release re-triggers review.
A different reviewer catches what the first missed.
An automated scan upgrades to manual review.

We've seen apps pass 3 releases with competitor brand mentions, then get rejected on release 4 because a new reviewer noticed. The penalty includes a longer review queue for future submissions.

Don't take "got through last time" as license. Each release is independent.

The 2026 enforcement trends

Based on recent observations:

Stricter on health claims. Anything resembling medical claims gets scrutinized.
Stricter on subscription disclosure. Hidden recurring billing causes review delays.
Stricter on AI claims. "AI-powered" is fine; "Best AI" or unsubstantiated AI superlatives are flagged.
Looser on competitor names in screenshot text — but still risky.
Looser on keyword density in description for Google Play — as long as it reads natural.

When to escalate aggressively

There's a productive level of aggression:

Safe aggressive

Pack iOS keywords field to 100 chars with diverse terms.
Subtitle uses different keywords than title.
Per-locale keyword research (not translation).
Google Play long description includes top keywords 2-3 times each.
Frequent keyword updates between releases.

Too aggressive

Competitor names anywhere in metadata.
Repeated keyword 5+ times in description.
Misleading claims (unsubstantiated rankings, awards).
Hidden keyword lists.
Title stuffing.

The first list is good ASO. The second list risks rejection or ranking suppression.

Common mistakes

Using competitor brand names. Rejection magnet.
Wasting iOS keywords field with plurals. Only one form indexed.
Repeating words in title that are already in subtitle. Both indexed.
Skipping localized keyword research. Translation ≠ optimization.
Hidden keyword tactics. Visible to algorithm, even if invisible to users.
Not updating keywords between releases. Free iteration cycle missed.

Audit your listing for risk

The free ASO audit flags risky keyword patterns (competitor names, suspicious repetition, etc.) along with the legitimate optimization opportunities. Use it before submission.

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