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ASOStacks vs Sonar (2026): which should you pick?

As of Oct 23, 2026, Sonar grades higher than ASOStacks: 2.4 against 2.0 out of 4.0.

Checked Oct 23, 2026 · graded Oct 23, 2026 by ToolGPA

Sonar grades higher on features and platforms. They get the same grade on value for money, the free plan and ease of use.

Price, platforms and features side by side. The table says where each price was read and when.

ASOStacks

Keyword research and daily rank tracking for both app stores

Free plan · from $19/mo
Full detailsasostacks.com

Sonar

ASO keyword data and rank tracking that AI agents can use over MCP

Free plan · from $24.17/mo
Full detailstrysonar.app

Which one is for you

Pick ASOStacks if

  • Fits if you're choosing which countries to launch or translate an app in
  • Works for studios tracking up to 100 apps on a flat monthly price

Look elsewhere if

  • Skip it if you need markets beyond its 30 countries
  • Tight if you're staying free, as tracking stops at 10 keywords and 2 apps
  • Watch out: API access on Studio is listed as coming soon, so there's no API yet
  • Watch out: only monthly prices are shown, though the terms mention annual subscriptions

Pick Sonar if

  • Fits if you run your ASO through an AI coding agent such as Claude Code or Codex
  • Works for small studios tracking up to 10 apps on both stores

Look elsewhere if

  • Watch out: the 7-day trial asks for a card and the plan starts on its own when it ends
  • Tight if you stay free, as rank tracking and the dashboard need a paid plan
  • Pricey if a team shares it, as more seats, white-label reports and priority refresh start at Agency, $149 a month
  • Watch out: API credits outside a plan are $10 per 1,000, and full keyword research uses 10 credits a call
  • Watch out: refunds are decided case by case under Sonar's terms

How we grade them

2.0GPAASOStacksFair2.4GPASonarFair
Value for money
CPro is $19 a month for 250 tracked keywords and 25 apps, this category's middle. Only monthly prices are shown, and Studio is $49 for 1,000 keywords and 100 apps.
CIndie is $24.17 a month billed yearly ($29 monthly) for 10 apps, 1 seat and 2,500 keywords, between this category's cheaper quarter ($10) and dearer quarter ($49). Credits outside a plan are $10 per 1,000.
Free plan and trial
CA free plan with no card: 10 tracked keywords and 2 apps with daily checks, plus daily caps of 20 keyword researches and 5 AI runs. Ten keywords goes quickly.
CWith no account, 7 API and MCP endpoints work at 30 requests a day per IP and 5 keywords a day for metrics. Tracking and the dashboard need a plan, and the 7-day trial takes a card.
Features
CKeyword scoring from 7 difficulty signals, daily rank tracking, a 30-country opportunity scan, download estimates by rank and a top-25 competitor breakdown. Its own listing names the gap: 30 countries, fewer than tools that cover every storefront.
BKeyword research with Apple's own Search Popularity, daily rank tracking in all countries, rival keyword gaps, ad spy, AI review replies, a listing manager and a screenshot studio. It covers the whole job.
Ease of use
CNo rating on record. It reads public store data, so there's no developer account to connect, but you still build the keyword list you want watched.
CNo rating on record. Through an agent you add the MCP server or CLI first; in the dashboard you still set up apps, keywords and rivals.
Platforms and integrations
CWeb only, with no desktop or phone app. Claude can query it as an MCP connector, but that's the one link on record, and the API on Studio is listed as coming soon.
BWeb only, with no desktop or phone app. A hosted MCP server with 63 tools, a CLI and a REST API reach Claude Code, Codex, Cursor, Claude and ChatGPT, and it links to App Store Connect.
Best forkeyword scoring on both stores in 30 countriesASO data for AI coding agents over MCP

The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: ASOStacks and Sonar. How we grade

Price against what you get

ASOStacks starts at $19 a month and scores 2.0 out of 4 on features, ease of use and platforms. Sonar starts at $24.17 a month and scores 2.7.

Sonar scores higher, and starts $5.17 a month higher: the question is whether the extra is worth that to you. Of the other app store optimization tools on the chart, 9 score higher than ASOStacks for less, and none scores higher than Sonar for less.

Features, ease of use and platforms, averaged

C2.0B3.0A4.0Free$5$10$20$50$100$200$500$1kMore for lessCosts more, scores moreCosts less, scores lessCosts more, scores lessASOStacksSonar

What paid plans start at, a month (each step along is roughly double) →

  • The best score at each price
  • Has a free plan
  • No free plan
The full chart of app store optimization tools, and the best at every price

Where they differ

    In commonFree planWebAI featuresKeyword researchRank trackingApp store optimization

    At a glance

    ASOStacksSonar
    PricingFree planFree plan
    Starts at$19 per month for 250 tracked keywords and 25 apps$24.17 per month, billed annually ($29 billed monthly)
    Free plan10 tracked keywords and 2 apps with daily rank checks, 20 keyword researches, 1 opportunity scan, 5 app reports and 5 AI tool runs a day. No card needed.No account needed: 7 API and MCP endpoints, such as keyword suggestions and top charts, at 30 requests a day per IP and 5 keywords a day for keyword metrics.
    Free trialNone listed7-day free trial of the paid plans; a card is required and the plan starts automatically
    Web
    Made byASOstacksSonar
    Price read fromasostacks.comtrysonar.app
    CheckedOct 23, 2026Oct 23, 2026

    Worth knowing

    ASOStacks

    • It covers 30 countries, fewer than tools that track every App Store storefront.
    • The free plan caps tracking at 10 keywords and 2 apps, with daily limits on research and AI tools.
    • Only monthly prices are shown, though the terms mention annual subscriptions; payments go through Creem.
    • API access on Studio is listed as coming soon.

    Sonar

    • Rank tracking and the dashboard need a paid plan; the 7-day trial asks for a card and the plan starts when it ends.
    • Indie has 1 seat and 2,500 keywords; team seats, white-label reports and priority refresh need Agency at $149 a month.
    • API credits outside a plan cost $10 per 1,000, and full keyword research uses 10 credits a call.
    • Refunds are decided case by case under Sonar's terms.

    Key features

    ASOStacks

    Keyword scoring
    Score up to 20 keywords across 5 countries at once for popularity, difficulty from 7 signals, and an opportunity score from 0 to 100.
    Daily rank tracking
    Every keyword searched is tracked automatically and checked daily at 6:00 UTC, with history, changes and biggest movers.
    Country opportunity finder
    Scans all 30 supported App Store and Google Play markets for one keyword to show where an app has the best chance to rank.
    Download estimates
    Estimates downloads per day for each search position from 1 to 20, so a ranking can be weighed in installs.
    Competitor intel
    Breaks down the top 25 apps for a keyword by ratings, review velocity, market age and publisher mix, and shows competitors' keywords.
    MCP connector for Claude
    ASOStacks can be connected to Claude as an MCP connector to query its keyword and ranking data.

    Sonar

    Keyword research
    Uses Apple's own Search Popularity where Apple reports it and Sonar's estimates elsewhere, with difficulty scores and AI suggestions checked against store autocomplete.
    Daily rank tracking
    Positions for every tracked keyword on both stores, updated daily in all countries, with unlimited history and App Store Connect downloads alongside.
    MCP server, CLI and API
    63 tools that Claude Code, Codex, Cursor, Claude, ChatGPT and other MCP clients can call; an agent can draft listings, but publishing stays with you.
    Competitor gaps and Ad Spy
    See every keyword a competitor ranks for and the ones you miss, plus the ads competitors run on Facebook, Instagram and TikTok.
    Review insights and responder
    AI summaries of praise and complaints, and AI-drafted replies to App Store reviews in the reviewer's language, with an optional auto mode.
    Listing Manager and Screenshot Studio
    Draft titles, subtitles and keyword fields with live data, design and localize screenshots in the browser, and export them for App Store Connect.

    Plans

    ASOStacks

    • Free$0

      10 tracked keywords, 2 tracked apps, daily rank checks, and daily caps on research, scans, reports and AI tools.

    • Pro$19

      per month for 250 tracked keywords and 25 apps

      Rank history, and unlimited keyword research, opportunity scans, app reports and AI tool runs (Suggest, Spy, Reviews).

    • Studio$49

      per month for 1,000 tracked keywords and 100 apps

      Everything in Pro, plus priority rank checks and priority support. API access is listed as coming soon.

    Sonar

    • Free tier$0

      7 stateless API and MCP endpoints with daily limits per IP, plus free browser tools for ASO scores and keyword ideas.

    • API Credits$10

      one-time top-up for 1,000 credits, used as you go

      Prepaid credits that never expire: most calls cost 1 credit, full keyword research 10. Packs up to $100 for 15,000 credits.

    • Indie$24.17

      per month for 10 apps, billed annually ($29 billed monthly)

      1 seat, 2,500 tracked keywords, unlimited competitors, all countries, 300 AI review replies a month and 1,000 API requests a day.

    • Agency$149

      per month for 50 apps, billed monthly ($1,490 a year billed annually)

      5 seats, 10,000 keywords, 5,000 API requests a day, portfolio rollup, white-label client reports and priority rank refresh.

    Ways to pay less

    ASOStacks

    No public discounts listed.

    Sonar

    • Annual discount

      Save 17% with annual billing

      Sonar's pricing lists annual billing at 17% off: Indie is $290 a year instead of $29 a month, and Agency $1,490 a year instead of $149.

    Common questions

    Which is cheaper, ASOStacks or Sonar?

    As of Oct 23, 2026, ASOStacks is cheaper to start with: $19 a month, against $24.17 a month for Sonar. ASOStacks starts at $19 per month for 250 tracked keywords and 25 apps, and Sonar starts at $24.17 per month, billed annually ($29 billed monthly).

    Which has a free plan, ASOStacks or Sonar?

    As of Oct 23, 2026, both ASOStacks and Sonar have a free plan.

    More comparisons

    How this page was made

    • The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
    • The grades are our own, from each tool’s review or report card. The GPA is their average.
    • Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
    • The differences and the answers to the questions are worked out from those listings.
    How we review and grade