Find the keywords you can
actually rank for
Search volume, difficulty, and daily rank tracking for every keyword on the App Store and Google Play — real data from Apple and Google, not estimates.
7-day free trial · Cancel anytime · No charge until the trial ends
TRUSTED BY INDIE DEVELOPERS
LAUNCH DEAL · FROM $12.42/MO $16.58 · LIMITED SPOTS
Watch
Sonar in 30 seconds
From keyword idea to top-10 ranking
Research
Pull keyword data directly from Apple Search Ads and Google Play autocomplete. Real search popularity — not estimated guesses. Each keyword gets a difficulty score (0–100) based on competitive analysis of the top 10 ranking apps.
Focus on terms where you actually have a chance.
Track
Add your app and Sonar tracks your position for every keyword daily. See which metadata changes move the needle, catch ranking drops before they cost you downloads.
Keyword gap analysis surfaces terms competitors rank for but you don’t.
Outrank
Put the research to work. Update your title, subtitle, and keyword field with the terms you can win, then verify the impact in your rank history. Alerts flag competitor moves and ranking drops so you never miss an opening.
Unlimited apps, both stores, full history — $12.42/month annual.
Revenue Estimates
NEWEstimated monthly revenue for any app on the store. Installs, retention, IAP pricing, and chart signals — the kind of data Sensor Tower charges thousands for.
Historical trends
Full rank history for every keyword, kept for as long as you subscribe. Spot seasonal patterns and see exactly when a metadata change paid off.
Your AI just became
an ASO expert
Connect Sonar to Claude, Cursor, or any MCP client and ask in plain English. Your AI pulls live keywords, rankings, reviews, and revenue estimates — then does the analysis for you.
- →Research by asking — “find keywords I can rank for”, “audit my listing”, “what changed for my competitor?”
- →Live data, not training data — 9 tools over both stores: keywords, rankings, reviews, revenue
- →It does the busywork too — on the Full plan your AI can set up apps, keywords, and competitors for you
2-minute setup · included on every plan
Which keywords can my habit tracker actually rank for in the US?
Three keywords stand out — real demand, beatable top 10:
“habit tracker” is dominated by Streaks and Habitica — skip it. Want me to add the other two to your rank tracking?
$19/month — a fraction of the price
Unlimited apps, keywords, and full history. Enterprise features without enterprise bloat.
Both stores, one dashboard
iOS App Store and Google Play side by side. No switching tools or stacking subscriptions.
API, CLI & MCP on every plan
REST endpoints, a native sonar CLI, and an MCP server that puts live App Store data inside Claude, Cursor, and Cline — with a copy-paste prompt library.
See real data before you pay
Three free ASO tools that work in your browser, no signup, with the same data engine that powers the full app store optimization tool.
ASO Score Checker
Audit any app's metadata. Title, subtitle, keywords, screenshots — get a score and a fix list.
Try it
Keyword Generator
Drop in a seed term, get hundreds of keyword ideas with popularity scores. Both stores, every country.
Try it
Keyword Difficulty
Free difficulty scores for popular app keywords. Browse by category or search any term.
Browse keywords
What indie devs are saying
“Sonar has made keyword research super easy — it has been great for preparing my app for launch on the App Store. It has a great MCP integration so AI models can use real-world data to create good descriptions and headlines and analyse competitors. Being able to see real keyword difficulty and competitor terms in one place saved me hours of guesswork.”
Jan Sviland
Maker of Musklr →“What is incredible about Sonar is their team! For anything you need, you will get a quick resolution.”
Raul Rodrigues
Upbeat Studio →“I run ASO across 15+ locales. Sonar's API lets me do keyword research and rank tracking without touching the dashboard. It's become essential infrastructure for my workflow.”
Shuto Yada
Mono Inc. →Simple, transparent pricing
One flat plan with everything included — plus pay-as-you-go credits for AI agents.
Launch deal · limited spots
$149/yr billed annually
7-day free trial · Cancel anytime · No charge until trial ends
Pay-as-you-go for AI agents & MCP. No dashboard.
50 free on signup · no card required
Frequently asked questions
[ ANSWER ]
What is Sonar?
Sonar is an App Store Optimization (ASO) tool for the iOS App Store and Google Play, built for indie developers and small teams. It combines keyword research (search popularity and difficulty scores for every keyword), daily rank tracking, competitor analysis, keyword gap analysis, review monitoring, and app revenue estimates in one dashboard. Everything is also available through a REST API, a CLI, and an MCP server, so AI assistants like Claude and Cursor can do ASO research with live data. One plan includes everything — unlimited apps and keywords — for $19/month or $149/year, with a 7-day free trial.
Which app stores do you support?
Sonar supports both the iOS App Store and Google Play Store. You can track keywords, rankings, and competitors across both platforms from a single dashboard — no need for separate tools or subscriptions. Data sources include the iTunes Search API for iOS app metadata and search rankings, App Store autocomplete for iOS keyword popularity, and Google Play autocomplete plus install data for Android keyword discovery. Both stores are treated as first-class citizens with full keyword research, difficulty scoring, and daily rank tracking.
Where does the keyword data come from?
Sonar builds its keyword metrics entirely from free, public store signals. For iOS, popularity is synthesized from App Store autocomplete priority combined with competitive signals from the top-ranking apps (review volumes and title relevance), normalized onto a 0–100 score; app metadata and search rankings come from the iTunes Search API. For Google Play, we use autocomplete frequency together with install-count data from the top results. All difficulty scores are calculated by our proprietary algorithm that analyzes the apps currently ranking for each keyword. Building on free public data keeps the tool fast and affordable — no expensive third-party data licenses to pass on to you.
What do the Popularity and Difficulty scores mean?
Popularity (0–100) estimates how much a keyword is searched — higher means more potential traffic. Difficulty (0–100) estimates how hard it is to reach the top of the results — higher means the apps already ranking are stronger and harder to displace. Both are directional scores designed for comparing keywords against each other inside Sonar, not absolute numbers you can line up against another tool, since every ASO tool uses its own scale. The Gap column (Popularity minus Difficulty) highlights the sweet spot: high demand with low competition. For a full breakdown of what goes into each score, see trysonar.app/aso-keyword-scores-explained.
How is the difficulty score calculated?
Our proprietary difficulty score (0–100) measures how hard it is to break into the top results for a keyword by analyzing the apps that already rank for it. It weighs how relevant those apps are to the term (for example, whether it appears in their titles), how established they are (install volumes, review counts, and ratings), how crowded the keyword is, and whether it's a branded term dominated by a single app. As a rough guide, 0–30 is low competition (a good opportunity), 30–60 is moderate, and 60–100 is highly competitive. We keep the exact weighting under the hood, but it's grounded in established ASO research and continuously calibrated.
How often are rankings updated?
Rankings are tracked daily for all subscribers. Automated rank tracking jobs run between 2–5 AM UTC, searching each of your tracked keywords and recording your app's rank in the results. Updated rankings are available in your dashboard by morning. You can also view historical rank trends over time to spot seasonal patterns, measure the impact of metadata changes, and catch ranking drops early. App metadata (ratings, reviews, install counts) is also synced daily to give you a complete picture of how your listing evolves.
Can I track competitor apps?
Yes — every subscription includes unlimited competitor tracking with no per-app fees. Add any competitor app from the App Store or Google Play and Sonar will monitor their keyword rankings alongside yours. You can compare rankings side-by-side, run keyword gap analysis to discover terms competitors rank for that you don't target yet, and track their metadata changes (new versions, description updates, category switches). Competitor intelligence is one of the fastest ways to find keyword opportunities: if a similar app ranks well for a keyword you're missing, that's a signal worth acting on.
Do you offer an API?
Yes. Sonar is built API-first — every data point in the dashboard is also available through our REST API. Full plan subscribers get 1,000 API requests per day across all endpoints, plus a command-line tool (CLI) for scripting and automation. For API-only users (AI agents, MCP tools, scripts), we offer prepaid credit packs from $10 — no subscription required. Each new account gets 50 free credits on signup. Stateless endpoints cost 1 credit per call (app lookup, search, ASO score, suggestions, reviews, keyword extraction), keyword research costs 10 credits, and bulk revenue calls cost 1 credit per app ID. Credits never expire and you can opt in to auto-recharge when your balance gets low. API keys use Bearer token authentication with the aso_ prefix. Full documentation with request/response examples is at trysonar.app/docs/api.
How much does Sonar cost?
Sonar has one plan with everything included: $19/month, or $149/year (which works out to $12.42/month). That covers unlimited apps, unlimited keywords, unlimited competitor tracking, all countries, full ranking history, review monitoring, alerts, and complete API, CLI, and MCP access. Every subscription starts with a 7-day free trial — you won't be charged until it ends and can cancel anytime. If you only need API access (for AI agents or scripts), prepaid credit packs start at $10 with no subscription.
Is there a free version?
There's no free plan, but you can get real data without paying. Three free tools work in your browser with no signup: the ASO Score Checker (trysonar.app/tools/aso-score) audits any app's metadata, the Keyword Generator (trysonar.app/tools/keyword-generator) turns a seed term into hundreds of scored keyword ideas, and the Keyword Difficulty browser (trysonar.app/keyword-difficulty) has free difficulty scores for thousands of popular app keywords. After signing up you can also browse a read-only live demo of the full product before starting the 7-day free trial, and every new account gets 50 free API credits.
What happens after my free trial?
After the 7-day trial, your subscription begins automatically — no action needed. Your data — tracked apps, keywords, ranking history, and competitor groups — is fully preserved. You can cancel anytime during or after the trial from your settings page. The Full plan is $19/month (or $12.42/month billed annually). The launch deal (50% off for life) is sold out.
Your keywords are waiting
Add your app, see where you rank, and find the keywords your competitors missed. Takes about two minutes.
7-day free trial · Cancel anytime