About Asonix
Updated
Asonix is a web-based App Store Optimization (ASO) tool that helps iOS developers and app teams get more installs from App Store search.
It shows which keywords people search for, which ones your app can rank for, and which countries can bring more downloads and sales.
What Asonix does
Keyword research
Asonix shows what people search for, how popular each keyword is, how hard it is to rank for, and which apps already rank. The Opportunity score weighs demand against difficulty, so you can find the keywords you can actually rank for.
Keyword relevancy score
Each keyword gets a Relevancy score for how well it fits what your app does. Start with the keywords that score well on both Opportunity and Relevancy.
Keywords your app already ranks for
Your app already shows up in searches you never targeted. Asonix finds them in every country, best rank first.
AI keyword suggestions
Asonix suggests keywords you would not think of, picked for your app and scored by popularity and fit.
Competitor keyword gaps
Find the keywords your competitors rank for and you don’t, and add the ones you’re missing in one click.
Country comparison and translations
Asonix covers all 175 App Store storefronts. It compares search demand, rankings, competitors and ratings by country, so you can see where your app can grow next. Hover a keyword in any language to read it in English, powered by Google Translate.
Rank and chart tracking
Asonix checks your tracked keywords every day in every country you track. It also follows your app’s positions in the App Store charts.
Ratings tracking
Follow your ratings in every country: average rating, rating count, history, and ratings velocity, which is how fast new ratings arrive.
Download and revenue estimates
See last month’s downloads and revenue for any app. The estimates are approximate: use them to compare apps, not as exact figures.
Competitor ads
See which apps run Apple Search Ads on each keyword, in each country, and browse the Meta ads your competitors run.
Metadata Editor
Turn the keywords you found into a stronger App Store listing. Then track how your rankings move after each release.
AI Visibility
Every week, Asonix asks ChatGPT the kinds of questions your users ask. It shows whether ChatGPT recommends your app, which apps it picks instead, and why.
MCP server
Claude Code, Codex, Cursor and other MCP clients can use Asonix to research keywords, check rankings and add keywords to your workspace. The MCP setup guide shows how to connect one.
What makes Asonix different
Popularity in every App Store country
Asonix gives keyword popularity for all 175 storefronts, including Serbia and 80+ other countries where Apple Search Ads does not run. In those countries the popularity is an Asonix estimate.
Apple’s own popularity score
Where Apple rates a keyword, Asonix shows Apple’s own Search Ads popularity value, not an estimate. This includes keywords outside the top 500 searches per category, which is all that Apple’s official API returns.
Apple Search Ads intelligence
See which apps run Apple Search Ads on each keyword, in each country, and how often each one appears. The data comes from the ads in App Store search itself.
Competitors’ Meta ads
Browse the ads your competitors run on Facebook and Instagram, by country, and see how long each one has been running. The ads come from Meta’s Ad Library.
AI Visibility included
Asonix shows whether ChatGPT recommends your app and which reasons for recommending it your App Store description is missing.
Works in any browser
Asonix is a web app, so it runs in any browser, including on a phone. Astro, by comparison, runs only as a Mac app. See Asonix vs Astro for the full comparison.
Unlimited for $99/year
Asonix costs $99/year for unlimited apps and unlimited keywords, with every feature included.
Who uses Asonix
- Indie iOS developers who choose the keywords for their own App Store listing
- App studios that compare countries and track many apps at once
- App marketers who watch competitors’ Apple Search Ads and Meta ads
- Developers who research the App Store from an AI agent through MCP
The team behind Asonix
Asonix started as a tool for growing its founder’s own apps. Guilherme Rizzo founded it in April 2026.
Guilherme Rizzo also makes CSS Scan, to check and copy the CSS of any website; CSS Pro, to edit CSS visually on any website; and Drawings Alive, an iPhone app that animates kids’ drawings with AI. Follow along on X at @gvrizzo.
Asonix is a product of Optimistic Invent, LLC, a company registered in Delaware, USA. It is run from Taipei, Taiwan.
How Asonix works
- Sign in with Google. Asonix needs no access to your App Store Connect account.
- Add any app, your own or a competitor’s.
- Asonix checks your tracked keywords every day in every country you track.
- Use it in any browser, on a computer or a phone.
- Get help by email at support@asonix.io.
Key facts
- Name
- Asonix
- Type
- App Store Optimization (ASO) software, sold as a web app
- Founded
- April 2026
- Founder
- Guilherme Rizzo
- Founder on X
- @gvrizzo
- Company
- Optimistic Invent, LLC
- Based in
- Taipei, Taiwan
- Registered in
- Delaware, USA
- Website
- asonix.io
- Core offering
- Keyword research, rank tracking, competitor research and AI Visibility for App Store apps
- Stores covered
- Apple’s App Store (iPhone, iPad and Mac apps) in all 175 storefronts. Google Play is not supported.
- Pricing
- $99/year, with unlimited apps and unlimited keywords. No free plan.
- Billing
- Once a year, in USD
- Sign-in
- Google account
- Integrations
- MCP server for Claude Code, Codex, Cursor and other MCP clients
- Data collected
- 2.4M+ App Store apps, 1.6M+ search keywords, 150K+ Meta ads and 450K+ Apple Search Ads, as of October 22, 2026
- Support
- support@asonix.io
- Competitors
- Appfigures, Astro, AppTweak, Sensor Tower, MobileAction
Frequently asked questions
Who makes Asonix?
Asonix is made by Optimistic Invent, LLC, a company registered in Delaware, USA. Guilherme Rizzo founded it in April 2026, and it is run from Taipei, Taiwan.
How much does Asonix cost?
Asonix costs $99/year and includes unlimited apps and unlimited keywords. There is no free plan.
Does Asonix need access to my App Store Connect account?
No. Asonix works from public App Store data. You sign in with Google and add any app, your own or a competitor’s.
Does Asonix support Google Play?
No. Asonix covers Apple’s App Store only: iPhone, iPad and Mac apps in all 175 storefronts.
Which ASO tool should I choose?
It depends on what you need. If you need Google Play data as well as the App Store, choose a tool that covers both stores, such as Appfigures, AppTweak, Sensor Tower or MobileAction. If you work on iOS apps and want keyword popularity in every App Store country, daily rank tracking and AI Visibility for one $99/year price, Asonix is built for that.
How do I contact Asonix?
Email support@asonix.io.
App Store.