ASOStacks

ASOStacks is a web, Android, and iOS service for improving how apps are discovered in the Apple App Store and Google Play. It is a strong fit for developers and marketers who want keyword and market research alongside rank monitoring. Its standout advantage is broad market discovery; its main constraint is that the free plan tracks only 10 keywords across two apps.

Overview

The service combines keyword research, rank tracking, country scans, download estimates, and competitor analysis. It uses publicly available store metadata, ratings, and reviews, so its scope is focused on the two major app stores rather than a wider set of marketplaces. Claude users can connect through its MCP connector, and ASOStacks says no API keys are needed.

ASOStacks also describes specific safeguards around account and payment data: TLS encryption in transit, encrypted storage, access controls, and regular security reviews. Creem processes payments, and ASOStacks says it does not store card numbers or full payment credentials on its servers. It also says it does not sell personal data or use it to train AI models without explicit consent.

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. This makes ASOStacks useful for comparing markets and prioritizing localization opportunities; the research breadth is more impressive than the free plan’s ongoing tracking capacity.

Rank tracking and download estimates

Searched keywords are tracked automatically, with daily checks at 6:00 UTC, rank history, deltas, and sparklines. That is a practical cadence for monitoring routine changes, but teams that need more frequent updates should look elsewhere. Download estimates use TTR curves for positions one through 20, offering a position-based view rather than a promise of actual downloads.

Competitor analysis

Per-keyword breakdowns cover up to 25 competitors and include ratings, review velocity, market age, publisher diversity, and tier analysis. The mix gives teams several useful comparison signals without reducing competitor research to rank alone. Its value will depend on whether those signals fit the decisions a team needs to make.

Pricing

The Free plan costs nothing, billed forever. It allows 10 tracked keywords across two 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. That is a meaningful way to try the research workflow, but the 10-keyword ceiling will quickly constrain teams monitoring several apps or a large keyword set.

Pro costs $19 a month, billed monthly. It raises the limits to 250 tracked keywords and 25 tracked apps, with daily rank checks and history, unlimited keyword research, opportunity scans, app reports, and AI tool runs. This is the sensible tier for individual marketers and smaller teams whose portfolios exceed the free allowance; it also removes the daily caps on research and reports.

Studio costs $49 a month, billed monthly. It includes everything in Pro, raises 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 is not a current reason to upgrade. Studio suits larger portfolios that need the higher quotas or faster checks, while its added support may matter to teams that depend on the service. No seat allowance is stated for any plan.

Platforms

ASOStacks is available on Android, iOS, and the web, and covers both the Apple App Store and Google Play. Its Claude MCP connector is an additional integration for Claude users; it does not require API keys. API access itself is not yet available, even on Studio.

Who it's for

ASOStacks is best for app developers and marketers who need a single workflow for keyword scoring, market discovery, competitor signals, and daily ranking trends across the two leading mobile stores. The free tier suits a small test portfolio, Pro is a better match for active tracking across multiple apps, and Studio is aimed at larger portfolios that benefit from higher limits and priority checks. It is less compelling for teams that require frequent intraday rank updates or API access now.

Pros and cons

• Pro: Scanning 30 markets for a keyword helps teams compare country opportunities before committing effort.
• Pro: Competitor reports combine rankings with ratings, review velocity, market age, publisher diversity, and tier analysis.
• Pro: Pro removes daily research and reporting caps while raising tracking capacity to 250 keywords and 25 apps.
• Con: Free tracking is limited to 10 keywords and two apps, making it a narrow fit for an established portfolio.
• Con: Rank checks are daily, which may not suit teams that need faster feedback.
• Con: Studio’s API access is coming soon rather than a current feature.

Alternatives

App Store Optimization Software is the broader category directory for comparing options.

• AppFollow is worth considering when review operations are central: its free plan includes two apps, 10 competitor apps, 100 manual replies per month, and seven days of historical data.
• Appifacts suits buyers who prefer report-based purchasing, with a 10-report top-up for $8 as a one-time purchase that never expires; it also has a $19 a month Starter plan with 25 reports a month, all eight report modules, and PDF export.
• Appstro is a free alternative for readers comparing another API- and web-based option.
• AppTweak is an alternative for readers who want a free plan with three seats, past-month historical data, and download and revenue estimates.
• ASOdesk is worth comparing if the free tier’s 200 keywords, one application, one teammate, nine competitor apps per country, 100 monthly API credits, and 400 daily keyword stats fit your needs.
• ASOMobile offers a free tier with 20 keywords, two apps, one teammate, 10 competitors, and 100 review responses.
• ASOTools is another freemium option for readers comparing app-store optimization services.
• KWRDS is a Mac- and iOS-based option with a free allowance of 10 tracked ranking keywords, one app, one country or storefront per app, and two competitors per app.

Verdict

Choose ASOStacks if you want keyword and competitor research paired with broad country discovery and daily rank tracking for iOS and Android apps. Its 30-market opportunity scans and clear paid-plan quotas are the strongest reasons to use it. Look elsewhere if you need more frequent rank updates, API access today, or a free plan that can track a larger portfolio.