Best ASO Tools for Indie Developers (2026)

Most indie ASO problems do not need a paid tool yet

An app with a few hundred downloads a month does not have enough search traffic for a keyword tool to say anything reliable. Apple and Google already give you impressions, product page views, conversion rate, and the search terms that drive installs. Read those first; the weekly ASO metrics guide lists the five numbers. Pay for a tool when you have a specific question those dashboards cannot answer, usually “which keywords should I add” or “did my rank move after the update”.

Three free first-party sources, four paid keyword and rank tools, one market-data suite, and the creative tools that turn research into a listing.

Free data you already have

App Store Connect analytics

App Analytics reports impressions, product page views, conversion rate, downloads by source, and, once the app has volume, the search terms that led to installs. It is the only place that shows your own conversion rate, which is the number ASO ultimately moves. Check it weekly and compare against the previous release, not against a benchmark from a blog.

Apple Search Ads popularity index

Inside Apple Search Ads, keyword suggestions carry a popularity score from 5 to 100. It is relative, not a search volume, but it is Apple’s own number and it is free with an account you do not have to fund. Most paid keyword tools calibrate against it. For a first pass at the 100-character keyword field it is enough.

Google Play Console

Play Console reports store listing visitors, acquisitions, and conversion by traffic source, shows the search terms with the most acquisitions, and runs store listing experiments so you can A/B test screenshots and descriptions without a third-party tool.

Keyword research and rank tracking

AppTweak

AppTweak is one of the established ASO suites: keyword research with difficulty and volume estimates, daily rank tracking by country, competitor metadata history, and Apple Search Ads intelligence. It is priced for teams and agencies, so an indie should look for the entry plan and decide whether the keyword data alone justifies it.

Mobile Action

Mobile Action covers the same ground, keyword and rank tracking across both stores, with a strong emphasis on ad creative and competitor ad intelligence. If you run paid acquisition alongside ASO, that combination is the reason to pick it.

AppFollow

AppFollow started as review management, replying to App Store and Play reviews from one inbox, and added rank and keyword tracking. For an indie, the review inbox with a free tier is the practical reason to sign up; the ASO modules are secondary.

Astro

Astro is a Mac app built by an indie developer for indie developers: keyword research, competitor keyword lists, and rank checks for the App Store, sold as a one-time purchase rather than a subscription. It does not try to be a suite, which is the point.

Sensor Tower

Sensor Tower, which absorbed data.ai, is the market intelligence reference: download and revenue estimates for any app, category benchmarks, and SDK data. It is priced for publishers and investors. Indies mostly encounter its numbers in press coverage; buy it only if you are sizing a market, not optimizing one listing.

The creative side of ASO

Keywords get an impression. Screenshots and the icon get the tap. The free ASO character counter checks the title, subtitle, keyword field, and both Play descriptions against the real limits at once. The live top grossing charts and top apps charts show which listings earn in your category across 30 storefronts, which is the research step before you write a headline. When the listing itself needs work, the App Store screenshot generator turns real captures into an editable set with AI headlines and exports every store size.

A sensible indie stack by stage

• Pre-launch: Apple Search Ads popularity index for the keyword field, the character counter for metadata, top charts for competitor research, and a screenshot tool for the listing. Total cost is the screenshot export.
• First thousand downloads: App Store Connect and Play Console weekly. Add AppFollow’s free tier if reviews start arriving faster than you can answer.
• Growing: One paid keyword and rank tool, chosen by platform. Astro for an iOS-only indie who hates subscriptions; AppTweak or Mobile Action when you need both stores and competitor history.
• Scaling: Market data from Sensor Tower only when a decision depends on category-level revenue, not before.