AppSigma vs Sonar (2026): which should you pick?
As of Oct 23, 2026, Sonar grades higher than AppSigma: 2.4 against 2.2 out of 4.0.
Checked Oct 23, 2026 · graded Oct 23, 2026 by ToolGPA
Sonar grades higher on features. They get the same grade on value for money, the free plan, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
AppSigma
App Store keyword tracking and review analysis with an MCP server
Sonar
ASO keyword data and rank tracking that AI agents can use over MCP
Which one is for you
Pick AppSigma if
- Fits if you work in Claude, ChatGPT or Cursor and want App Store ranks inside it
- Works for small teams tracking up to 10 iOS apps on one $19.99 plan
Look elsewhere if
- Skip it if you have an Android app, as Google Play isn't covered
- Tight if you're staying free, since the free plan tracks 1 app and 5 keywords in one market
- Watch out: paid plans list unlimited keywords, but daily positions are described as covering up to 500 per app
- Watch out: only monthly prices are shown, with no discount for paying yearly
- Pricey if more than 3 people need access, since 10 team members means Pro at $49.99 a month
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
| 2.2GPAAppSigmaFair | 2.4GPASonarFair | |
|---|---|---|
| Value for money | CStarter is $19.99 a month for 10 apps and 3 team members, about this category's $19 middle, and only monthly prices are listed. Pro is $49.99 for unlimited apps and 10 people. | 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: 1 app and 5 keywords in one market with daily positions, the newest 500 reviews analyzed and 1,000 API credits. Five keywords is a cap you'll hit straight away. | 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 | CDaily ranks with popularity and difficulty, competitor keyword gaps, visibility scores, AI review labels, 180 days of chart history and alerts. The gap is in its own listing: App Store only, with Google Play not mentioned. | 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. You add apps, keywords and markets in a web dashboard, or connect the MCP server to your assistant, before it tells you much. | 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 | BWeb only, with no desktop or phone app. A REST API and an MCP server on every plan reach Claude, ChatGPT and Cursor, and it links to App Store Connect and Figma. | 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 for | App Store keyword tracking over MCP | ASO 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: AppSigma and Sonar. How we grade
Price against what you get
AppSigma starts at $19.99 a month and scores 2.3 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 $4.18 a month higher: the question is whether the extra is worth that to you. Of the other app store optimization tools on the chart, 3 score higher than AppSigma for less, and none scores higher than Sonar for less.
Features, ease of use and platforms, averaged
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
Where they differ
At a glance
| AppSigma | Sonar | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $19.99 per month for 10 apps and 3 team members | $24.17 per month, billed annually ($29 billed monthly) |
| Free plan | 1 user, 1 app with 5 keywords in one market, daily positions, the newest 500 reviews analyzed, MCP access and 1,000 API credits. 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 trial | None listed | 7-day free trial of the paid plans; a card is required and the plan starts automatically |
| Web | ||
| Made by | AppSigma | Sonar |
| Price read from | appsigma.io | trysonar.app |
| Checked | Oct 23, 2026 | Oct 23, 2026 |
Worth knowing
AppSigma
- It covers Apple's App Store only; the site says its data comes from the public iTunes Search API, and Google Play is not mentioned.
- The free plan tracks just 1 app and 5 keywords in one market.
- Only monthly prices are shown; no annual discount is listed.
- Paid plans list unlimited tracked keywords, but daily positions are described as covering up to 500 keywords per app.
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
AppSigma
- Daily keyword tracking
- Positions are re-checked after a daily 02:00 UTC crawl, with movers, best-ever rank, and popularity and difficulty scores; paid plans cover up to 500 keywords per app.
- Competitor keyword gaps
- Finds the apps ranking next to yours, compares visibility side by side and lists keywords where a rival ranks and you do not.
- AI review analysis
- Labels each review by sentiment against its stars, review type, complaint and praise topics, and flags such as a surprise charge.
- Chart history
- Top-chart positions overall and by genre in every country, with 180 days of history and app releases marked on the timeline.
- MCP server and REST API
- An MCP server with 22 tools connects to Claude, ChatGPT or Cursor on every plan; the REST API is billed in credits, one per row of data.
- Weekly digest and alerts
- Paid plans send a Monday email per app with keyword and competitor moves, plus ranking alerts at thresholds you set.
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
AppSigma
Free$0
1 app and 5 keywords in one market with daily positions, the newest 500 reviews analyzed, and browsing of any app's data.
Starter Monthly$19.99
per month for 10 apps and 3 team members
Every feature: keyword tracking in any market, competitor gaps, visibility scores, AI review analysis and 50,000 API credits a month.
Pro$49.99
per month for unlimited apps and 10 team members
The same features as Starter with unlimited apps, 10 team members and 250,000 API credits a month.
EnterpriseCustom
Custom plans for larger teams, arranged with the sales team.
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
AppSigma
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, AppSigma or Sonar?
As of Oct 23, 2026, AppSigma is cheaper to start with: $19.99 a month, against $24.17 a month for Sonar. AppSigma starts at $19.99 per month for 10 apps and 3 team members, and Sonar starts at $24.17 per month, billed annually ($29 billed monthly).
Which has a free plan, AppSigma or Sonar?
As of Oct 23, 2026, both AppSigma 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.