ASOStacks

ASOStacks is an app store optimization service for iOS and Android listings, best suited to developers and marketers who need keyword research and market coverage across both major stores. Its blend of broad discovery tools and sharply tiered tracking quotas makes the free plan a useful starting point, while larger portfolios will need a paid tier.

Overview

ASOStacks combines keyword research, rank monitoring, market scans, download estimates, and competitor analysis, drawing public app metadata, ratings, and reviews from Apple App Store and Google Play. It runs on the web, Android, and iOS, and its Claude MCP connector can be used without API keys. For teams centered on these two storefronts, the service covers the core discovery and monitoring workflow in one place.

Key features

Keyword research and market discovery

Research scores up to 20 keywords across five countries at once, using popularity, seven-factor difficulty, and opportunity scores. The Country Opportunity Finder scans 30 App Store and Google Play markets for a keyword. That breadth helps teams compare potential markets before committing localization effort; it does not remove the need to prioritize which terms deserve ongoing tracking.

Rank tracking and estimates

Searched keywords are tracked automatically, with daily checks at 6:00 UTC, history, deltas, and sparklines. Daily monitoring and trend context are useful for routine ASO work, but the fixed daily cadence is not a fit for teams that need more frequent rank updates. TTR-curve-based estimates show downloads per day for positions 1 through 20, giving a position-specific planning signal rather than coverage across every rank.

Competitor analysis and data

Per-keyword competitor breakdowns cover up to 25 competitors and include ratings, review velocity, market age, publisher diversity, and tier analysis. This is a substantial set of comparison points for assessing a keyword's competitive field. The underlying store data comes from publicly available metadata, ratings, and reviews, so the service is focused on storefront signals.

Privacy and payment

ASOStacks says it does not sell personal data or use it to train AI models without explicit consent. Its privacy policy describes TLS encryption in transit, encrypted storage, access controls, and regular security reviews. Creem processes payments; ASOStacks says it does not keep card numbers or full payment credentials on its servers.

Pricing

The Free plan costs nothing, billed forever. It allows 10 tracked keywords and two tracked apps, daily rank checks, 20 keyword researches per day, one opportunity scan per day across 30 countries, five app reports per day, and five AI tool runs per day. This is a credible way for an individual or small project to explore the service, but the tracking caps are restrictive for managing several live listings.

Pro costs $19 a month, billed monthly. It raises capacity to 250 tracked keywords and 25 tracked apps, keeps daily rank checks with history, and makes keyword research, opportunity scans, app reports, and AI tool runs unlimited. This is the practical step up for a working ASO portfolio that outgrows the free caps without needing Studio-scale limits.

Studio costs $49 a month, billed monthly. It includes everything in Pro, expands capacity to 1,000 tracked keywords and 100 tracked apps, and adds priority rank checks and priority support. API access is marked as coming soon, so it should not be a deciding factor for buyers who need API access now. The added capacity and priority service make Studio more appropriate for larger portfolios than for a single app or occasional research.

Platforms

ASOStacks is available on the web, Android, and iOS, with marketplace coverage for both Apple App Store and Google Play. Its Claude MCP connector is an additional route for Claude users, and does not require API keys.

Who it's for

Choose ASOStacks if you need keyword scoring, multi-market discovery, daily rank histories, and competitor context across iOS and Android. The Free plan suits a small test portfolio, while Pro fits teams that need more tracked terms and apps plus uncapped research. Studio is the better fit when those monthly quotas or priority support matter. Look elsewhere if your workflow depends on rank refreshes more often than daily, or on currently available API access.

Pros and cons

• Pros: The Country Opportunity Finder covers 30 markets, useful for comparing geographic opportunities without limiting discovery to one storefront.
• Pros: Competitor reports combine up to 25 rivals with ratings, review velocity, market age, publisher diversity, and tier analysis.
• Pros: Pro removes daily caps on keyword research, opportunity scans, app reports, and AI tool runs, while keeping daily rank history.
• Cons: Free tracking is limited to 10 keywords and two apps, so it is best for a narrow portfolio.
• Cons: Rank checks run daily at 6:00 UTC, which may be too slow for teams that need more frequent monitoring.
• Cons: Studio API access is still coming soon, so it does not meet an immediate API requirement.

Alternatives

For a broader comparison, browse App Store Optimization Software.

• ASOdesk is worth considering if its free allowance of 200 keywords, one application, one teammate, nine competitor apps per country, 100 API credits per month, and 400 daily keyword stats better matches your starting needs.
• ASOTools is another freemium alternative with a free plan.
• AppFollow may suit a small portfolio focused on replies: its free plan covers two apps, 10 competitor apps, 100 manual replies per month, and seven days of historical data.
• AppTweak is an option if three seats, past-month history, and download and revenue estimates are the priorities for a free starting plan.
• ASOMobile offers a free plan with 20 keywords, two apps, one teammate, and 10 competitors, which may suit a compact account with those limits.
• KWRDS is a free alternative for iOS and macOS users who want 10 tracked ranking keywords, one app, one country or storefront per app, and two competitors per app.
• Appifacts may fit report-led work, with a one-time 10-report top-up for 8.00 USD and a Starter plan at $19 a month for 25 reports monthly, all eight report modules, and PDF export.
• Appstro is another free alternative.

Verdict

ASOStacks is a strong fit for developers and marketers who need cross-store keyword discovery, country scans, and competitor context, with enough free capacity to assess a small portfolio. Pro is the clearest choice once tracking and research limits begin to constrain regular work. Choose another tool if you need more frequent rank checks or API access today.