iOS App Store vs Google Play: How ASO Differs Between Platforms

Two Stores, Two Algorithms

If your app is on both iOS and Google Play, you need two separate ASO strategies. The stores index different fields, weight different signals, and provide different data. What works on one often doesn't translate directly to the other.

Here's what you actually need to know about the differences.

Metadata Fields

The biggest difference: iOS gives you a hidden keyword field; Google Play indexes your long description. This fundamentally changes how you approach keyword targeting.

On iOS, you have exactly 160 characters of indexed space (30 title + 30 subtitle + 100 keyword field). Every character counts. You need to be surgical about keyword selection and never repeat words across fields.

On Google Play, you have 30 + 80 + 4,000 = 4,110 characters of indexed space. You have room for dozens of keywords, but you need to incorporate them naturally into readable descriptions. It's closer to web SEO content writing.

Ranking Factors

Both stores use a combination of keyword relevance and app quality signals, but the weighting differs:

iOS Ranking Signals (estimated importance)

1. Keyword relevance — exact match in title > subtitle > keyword field
2. Download velocity — recent download rate relative to competitors
3. Ratings and reviews — volume and recency matter more than raw average
4. Retention / engagement — Apple factors in whether users keep using the app
5. Update frequency — regularly updated apps get a slight boost

Google Play Ranking Signals (estimated importance)

1. Keyword relevance — title > short description > long description
2. Install count — total installs (public number) heavily influences ranking
3. Ratings and reviews — similar to iOS, volume and recency weighted
4. Uninstall rate — Google penalizes apps with high uninstall rates
5. Backlinks and web presence — Google indexes your Play Store listing like a web page
6. Vitals — crash rate, ANR rate, and other technical quality metrics

Key difference: Google Play considers total install count as a major ranking factor. iOS weights recent download velocity more. This means established apps have a bigger moat on Google Play, while iOS gives newer apps more chance to break through with recent momentum.

Search Volume Data

The data available for keyword research differs dramatically:

iOS

• Apple Search Ads provides the Search Popularity (SP) score (5-100, relative scale)
• SP is the best keyword volume metric available for iOS
• Since October 2025, only keywords with SP >= 35 are reported
• Autocomplete priority (0-10,000) serves as a free proxy for lower-volume keywords
• No raw search counts — Apple doesn't expose actual search numbers

Google Play

• No official keyword volume data exists for Play Store searches
• Google Ads Keyword Planner shows web search volume, which is a rough proxy but not the same as Play Store search volume
• Autocomplete suggestions exist but return no priority scores like Apple's
• Install count ranges are public (minInstalls/maxInstalls) — this is data iOS doesn't provide
• Google Search Console shows impressions for your Play Store listing in web results

The irony: Apple gives you better keyword volume data (via SP scores) but no install data. Google gives you install data but no keyword volume data. A complete picture requires data from both ecosystems.

Practical Optimization Strategy per Store

iOS Strategy

Title (30 chars): Brand + primary keyword. Use every character.

Subtitle (30 chars): Secondary keyword. Don't repeat title words.

• Comma-separated, no spaces
• All remaining keywords, sorted by opportunity
• Singular forms only (Apple handles plurals)
• Don't repeat any word from title or subtitle
• Don't include category name, "app," or competitor brands

Description: Write for humans only. Apple doesn't index it for search. Use it to convince users to download once they've found you.

Metadata update cycle: Every 4-6 weeks. Each update re-indexes your app, and you can test new keywords.

Google Play Strategy

Title (30 chars): Same as iOS — brand + primary keyword.

Short description (80 chars): 2-3 secondary keywords woven into a compelling sentence. You have more room than iOS subtitle.

• Include primary keywords 3-5 times naturally
• Include secondary keywords 2-3 times each
• Structure with feature-focused paragraphs
• Front-load important keywords in the first 1-2 sentences
• Write useful, readable content — Google's algorithms detect keyword stuffing

Developer name: If your developer name can include a keyword naturally, it helps. But don't make it spammy.

Metadata update cycle: Same frequency as iOS, but note that Google Play re-indexing can take longer (up to a week for full ranking changes vs 24-48 hours on iOS).

Localization

Both stores support localized metadata, but the implementation differs:

iOS — you can (and should) provide separate title, subtitle, and keyword field for each locale. Apple has locale-specific search indexes. A keyword in your US English metadata won't help you rank in the Japan store unless you also provide Japanese metadata.

Google Play — same concept, separate metadata per locale. Google additionally cross-references some English keywords in non-English locales, but having localized metadata is far more effective.

Localization priority: If you can only localize for a few markets, start with the largest ones by store revenue: US, Japan, UK, South Korea, and Germany for iOS; US, Japan, South Korea, India, and Germany for Google Play.

Reviews and Ratings

Both stores show aggregate ratings and reviews, but handling differs:

iOS — you can reset your rating with each major version. This is powerful if you've fixed issues that caused bad reviews. Use it strategically (only reset when the underlying problems are genuinely fixed).

Google Play — no rating reset mechanism. Your rating is cumulative. This makes early reviews disproportionately important.

Review strategy for both: Prompt for reviews after positive moments (completing a task, achieving a goal, using the app for 3+ days). Don't prompt too early or too frequently. Both stores penalize apps that nag users for reviews.

Which Store Is Easier for Indie Developers?

iOS is generally more accessible for new indie apps because:

1. Download velocity matters more than total installs — you can outrank older apps with recent momentum
2. The hidden keyword field gives you 100 characters of pure keyword targeting
3. Smaller total app count means less competition for niche terms
4. Rating reset on major versions lets you recover from early mistakes

Google Play advantages for indie apps:

1. More indexed text (4,000-char description) means more keyword opportunities
2. Public install counts let you better assess competition
3. Faster review approval times (usually hours vs 24-48 hours on iOS)
4. Android users are generally more willing to try lesser-known apps

The honest answer: optimize for both, but if you're resource-constrained, iOS ASO typically yields higher per-download value (higher average revenue per user) while Google Play ASO can yield higher download volume.

Key Takeaways

• iOS has a hidden keyword field (100 chars); Google Play indexes your full description instead
• Google Play weights total installs more heavily; iOS weights recent download velocity
• Apple provides Search Popularity scores for keyword volume; Google Play has no equivalent
• iOS metadata indexing is limited to title + subtitle + keyword field (160 chars total)
• Google Play gives you 4,110 chars of indexed space — treat it like web SEO
• Maintain separate keyword strategies per store — competitive landscapes differ
• iOS is generally more accessible for new indie apps due to velocity-based ranking