54 free App Store optimization tools
Every ASO tool on Appstro, grouped by the job it does: App Store keyword research, keyword rank tracking, listing and metadata checks, screenshot teardowns, localization audits and top grossing App Store charts. Free, and most of it works without an account. New to this, or want the reasoning behind the fields? Start with the ASO guide and the ASO checklist.
Keywords & rankings
10Keyword research
Apple's own autocomplete, expanded and scored by live ranking difficulty.
App Store keyword tool
Every term an app ranks for, pulled from live search results.
Keyword rank checker
Where an app sits for any keyword, in any of 175+ storefronts.
Daily rank trackingAccount
Flag keywords and get a daily snapshot, with 7/30/90-day history and movement.
Keyword gap
Terms a competitor ranks for and you do not, from live search.
Keyword cannibalization
Terms where two of your own apps land in the same result.
Keyword shufflerOffline
Every permutation of a keyword set, for filling the 100-character field.
Keyword density counterOffline
How often each term appears in a description, ranked by frequency.
ASO score
Grades a listing out of 100 and hands back a specific fix list.
Metadata checker
Title, subtitle and keyword field against Apple’s caps and duplication rules.
Listing & metadata
5Listing kit
Every App Store Connect field on one paste-ready sheet, with live cap checks.
Above the fold
How much of your description survives before the “more” link, measured at three phone widths.
Release notes writerAI
Turns a raw changelog into three lengths of “What’s New”, in your own voice.
In-app events planner
Badge, copy fields and schedule checked against Apple’s published event rules.
AI ASO coachAI
A critique of your listing plus drafted title, subtitle, keywords and promo text.
Creative & conversion
5Screenshot teardown
Your screenshots beside the first shot of the ten apps ranking for a term.
Icon teardown
Your icon in the search row at real size, plus the colour split across rivals.
Viral loop calculatorOffline
Turns invites and conversion into a k-factor, and the multiplier it applies to every other channel.
A/B test calculatorOffline
Sample size and duration for a Product Page Optimization test, corrected for three treatments.
Compare apps
Two or more apps side by side — ranks, ratings, size, age and estimates.
Localization & reach
5Localization audit
Which storefronts have a translated listing and which are still reading English.
Localization priority
Storefronts where you already have ratings but no translated listing, ranked.
Localized metadataAI
Drafts every listing field for one of the 38 App Store languages.
Worldwide reviews
Rating count and average per storefront across 58 countries, most-rated first.
Language coverage
How many languages your binary declares, against the apps you compete with.
Launch, press & community
6Where to launch
30 verified places to submit a new iOS app, tickable as you go.
Launch post writerAI
Drafts the post per venue — X, Reddit, Show HN, Product Hunt and a reusable blurb.
Campaign link builder
One tagged App Store link per venue, so downloads can be attributed.
Viral loop calculatorOfflineNew
What a share or invite feature is actually worth, and what it would take to double it.
Press kit generator
A ready press kit from your listing — copy, assets and the facts a writer asks for.
Feedback exchangeAccount
Trade honest product critique with other developers. Never App Store reviews.
Market intelligence
6Apps directory
Browse the bundled App Store dataset by category, with the giants filtered out.
Trending apps
Today’s climbers, fallers, new entrants and drop-offs across the charts.
Opportunity finder
Niches with real revenue and weak competition, derived from live charts.
Downloads to top
Roughly how many installs a day it takes to hold each chart position.
Publisher search
Any developer’s full portfolio, with downloads and revenue aggregated.
Weekly movers archive
One issue per week of what moved in the charts, kept as a record.
Benchmarks & money
5Rating benchmark
Your ratings against your reach, ranked inside your own search result.
Monetization mix
How the 25 apps in your result actually charge, plus revenue per install.
Update recency
How long ago you shipped, against everyone else in the same result.
Apple Search Ads targets
Scored keyword targets and negatives, exportable as an ASA bulk sheet.
Connected Apple AdsAccount
Real spend, taps, installs, CPT and CPA from your own Apple Ads account.
Compliance & technical
3Privacy label plannerOffline
A worksheet for the App Privacy questionnaire, including the third-party SDK trap.
Age rating plannerOffline
All 24 of Apple’s content descriptors, with its own definitions beside each.
Install friction
Minimum iOS version and download size, against the apps you compete with.
AI & integrations
4AI visibilityAI
Whether AI assistants name your app when someone asks for one like it.
App R&D labAI
Analyse a niche and generate a feature set and wireframes with AI.
My R&D projects
Everything the R&D lab has produced, saved in this browser.
MCP server
All of this data inside Claude, Cursor or any MCP-speaking client.
Your workspace
3Guides
2Many of these take an app as input. Search one on the homepage or open it from the apps directory and every per-app view — rank history, keyword rankings, reviews, ads and the ASO change timeline — opens already loaded with it. If you only have a seed word rather than an app, the keyword suggestion tool expands it against Apple's own autocomplete.