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Free · App Store optimization

Free App Store ASO Checker

Drop your Apple App Store URL and get an instant 0–100 ASO score. We grade your title, subtitle, description, screenshots and ratings against the factors Apple actually ranks (Apple keeps the keyword field private), and tell you the highest-impact fixes first.

Free · No sign-up to see your score · Works on any public App Store app

See it first

A sample of the score you’ll get

Paste your App Store URL above and we grade the listing instantly: an overall score, a breakdown by category, and the highest-impact fixes, like this real example.

  • Overall score out of 100, graded
  • Category breakdown, weakest first
  • Specific, prioritized fixes
ASO Score

Audit complete

Grade A

82

/ 100

Metadata Optimization
94%
Keyword Strategy
65%
Conversion Quality
90%
Readability & Brand Voice
65%
Trust Signals
100%

  • Primary keyword appears in subtitle

    Primary keyword “language lessons” is missing from the subtitle. Apple indexes the subtitle, work the keyword in.

  • Outcome language vs feature dumping

    Only 1 outcome phrase detected. Users convert on benefits (‘save time’) not features (‘supports CSV export’).

  • Primary keyword appears in title

    Primary keyword “language lessons” is in the title, the heaviest-indexed field in store search.

Quick answerUpdated September 2026 · ReachFront ASO research

An App Store ASO checker is a free tool that scores how well an iOS app's listing is optimized for Apple App Store search. It grades the title, subtitle, description, screenshots and ratings on a 0–100 scale (Apple keeps the keyword field private) and shows the specific, highest-impact fixes, so you can see exactly where your listing is losing rankings and installs.

How it works

Your ASO score in three steps

01

Paste your App Store URL

Copy the link to your app's Apple App Store page (apps.apple.com/…) and drop it in. Optionally add the keyword you most want to rank for.

02

We fetch & analyze your live listing

In a few seconds we pull your real title, subtitle, screenshots and ratings, then run around 30 ASO checks against App Store best practices.

03

See your score & unlock the full fix list

Your 0–100 score and grade appear instantly, free and with no account. Start 7 days free on Max to see the complete per-check breakdown with AI-written fixes tailored to your exact copy.

The App Store ASO checklist

  • Front-load your primary keyword in the 30-character app title.
  • Use the full 30-character subtitle with a benefit-led, keyword-rich line.
  • Fill the 100-character keyword field with comma-separated, non-duplicate terms.
  • Add at least 5 screenshots that show real in-app scenarios, plus an app preview video.
  • Keep your average rating above 4.0 and prompt for reviews after positive moments.
  • Ship an update every 6–8 weeks so the listing stays fresh in search.
  • Localize the title, subtitle and keywords for your top 3 markets.
  • Write the description to convert, hook, benefits, social proof, since Apple doesn't index it.
The basics

What is an App Store ASO score?

App Store Optimization (ASO) is the practice of improving an iOS app's store listing so it ranks higher in App Store search and converts more of the people who see it into installs. An ASO score is a single 0–100 number that tells you how well your current listing follows those ranking and conversion best practices.

Apple's search algorithm indexes a specific set of fields, most importantly your app name (title), subtitle, and the hidden 100-character keyword field. Unlike Google Play, Apple does not index your long description for search, so wasting your title or subtitle on filler is one of the most common and costly iOS ASO mistakes.

This free App Store ASO checker fetches your live listing and audits every public field (Apple keeps the keyword field private, so no outside tool can read it), then returns a grade (A+ to F) with specific, prioritized fixes. It's the fastest way to see where your iOS listing is leaking rankings and installs before you invest in a full optimization pass.

Key facts

App Store ASO at a glance

  • The App Store app title and subtitle are each capped at 30 characters.
  • Apple provides a hidden 100-character keyword field that is indexed for search.
  • Apple does not index the app description for App Store search, only the title, subtitle and keyword field carry keyword weight.
  • Apple automatically stems keywords, so singular and plural forms match without listing both.
  • The app title is the single most heavily weighted field in App Store search ranking.
  • A 4.0+ average rating is widely treated as the floor for competitive App Store rankings.
What we grade

What our App Store ASO checker grades

Every check is weighted by how much it actually moves App Store rankings and conversion, high-impact fields like the title and subtitle count for more than cosmetic details.

01App name / title (30 characters, indexed)The single heaviest-weighted field in App Store search. We check length, whether your primary keyword is present and front-loaded, and that it reads as a brand plus descriptor rather than a comma-stuffed keyword list.
02Subtitle (30 characters, indexed)Apple indexes the subtitle for search, so it's prime keyword real estate. We check that it uses the full 30 characters, reads as a complete benefit-led phrase, and adds keywords your title doesn't already cover.
03Keyword strategyApple keeps your 100-character keyword field private, so no outside tool can read it. We assess keyword coverage and front-loading across your title and subtitle, and flag signs of keyword stuffing that Apple penalizes.
04Screenshots & app previewThe biggest driver of conversion on the product page. We check screenshot coverage so visitors see real scenarios, not just one frame, before deciding to download.
05Ratings & reviewsAverage rating and review volume are both ranking and conversion signals. We flag when your rating sits below the 4.0 ranking floor or your review count is too thin to build trust.
06Description, freshness & conversion copyYour description isn't indexed for iOS search, but it still converts. We grade the hook, benefit language, scannability, and how recently you've shipped an update, stores favour fresh listings.
Avoid these

Common App Store ASO mistakes

The fixes that move the needle most are usually undoing one of these. Our checker catches them automatically.

01Wasting the title on the brand name aloneA brand-only title like 'Lumio' indexes for nothing but your own name. Pair it with a keyword descriptor, 'Lumio: Habit Tracker', to capture non-branded search demand within the 30-character cap.
02Duplicating keywords across title, subtitle & keyword fieldApple only needs to see a keyword once to index it. Repeating 'budget' in the title, subtitle and keyword field burns characters you could spend on new terms. De-duplicate ruthlessly.
03Stuffing the description with keywordsApple does not index the description for search, so keyword-stuffing it does nothing for rankings and hurts conversion. Write the description purely to convince the reader to install.
04Ignoring the 100-character keyword field formattingUse single words separated by commas with no spaces (budget,planner,expense), skip plurals Apple already stems, and never repeat your app name or category, those are indexed automatically.
05Letting the rating sit below 4.0Average rating is both a ranking and a conversion lever. Below the 4.0 floor, you lose search position and scare off installers. Trigger rating prompts after positive in-app moments.
Know the terms

App Store ASO glossary

The vocabulary every iOS developer needs to optimize a listing, defined plainly.

App title
The app's name on the App Store, capped at 30 characters and the most heavily indexed field in Apple search.
Subtitle
A 30-character line under the title that Apple indexes for search keywords and uses to pitch the app's core benefit.
Keyword field
A hidden 100-character field in App Store Connect for comma-separated search terms; the main place to add keywords you can't fit in the title or subtitle.
Keyword stemming
Apple automatically matches singular/plural and word variations, so you should never waste keyword-field characters on both 'task' and 'tasks'.
Promotional text
A 170-character updatable line at the top of the description; not indexed for search but useful for announcements and conversion.
In-app events
Time-limited App Store cards (challenges, premieres, launches) that can surface in search and editorial and drive discovery.
Custom product pages
Up to 35 alternate App Store pages with different creative, each with its own URL, for testing messaging against different audiences and ad campaigns.
Conversion rate (CVR)
The share of product-page visitors who tap Get and install, driven mostly by icon, screenshots, ratings and the first impression.
Branded vs non-branded keywords
Branded terms include your app or company name; non-branded terms describe what the app does. Non-branded keywords win you new users who don't know you yet.
Side by side

App Store vs Google Play ASO

The same app needs a different metadata strategy on each store. Here's how iOS and Android ASO differ field by field.

Factor App Store Google Play
App title limit30 characters (indexed)30 characters (indexed)
Second fieldSubtitle: 30 characters (indexed)Short description: 80 characters (indexed)
Dedicated keyword fieldYes: hidden, 100 charactersNo
Description indexed for searchNoYes: full 4,000 characters
Built-in A/B testingCustom Product PagesStore Listing Experiments
LocalizationEach locale indexed separatelyEach locale indexed separately
Primary creativeScreenshots & app preview videoScreenshots, feature graphic & video
Paid search platformApple AdsGoogle App Campaigns
Frequently asked

App Store ASO, answered

Anything 80 or above (grade A) means your iOS listing follows the core App Store optimization best practices well. Scores of 60–79 (B/C) usually mean your title or subtitle isn't using keywords efficiently or your screenshots and ratings need work. Below 60, you're likely leaving significant search visibility and installs on the table.
Yes. You can check your App Store listing's ASO score for free, with no credit card. Your 0–100 score, letter grade and category breakdown are shown instantly. A 7-day free Max trial unlocks the full per-check report with AI-written fixes written for your specific listing.
No. Unlike Google Play, Apple does not index your long description for App Store search. Only your app name (title), subtitle and the hidden 100-character keyword field carry keyword ranking weight. Apple keeps the keyword field private, so our checker puts the most emphasis on your title and subtitle; the description still matters for conversion, but not for keyword rankings.
We fetch your live App Store listing and run around 30 checks across five areas: metadata (title/subtitle), keyword strategy, conversion quality, readability, and trust signals (ratings, reviews, freshness). Each check is scored by its real ranking impact, then combined into a single 0–100 score and an A+ to F grade.
Yes. The checker works on any public App Store URL, including competitors. It's a fast way to benchmark your listing against the apps you're trying to outrank and spot the keyword and conversion gaps you can exploit.
The biggest difference is what each store indexes. Apple indexes the title, subtitle and a hidden keyword field but not the description. Google Play indexes the title, short description and the full long description. So the same app needs different metadata strategies on each store, which is why we offer separate checkers for the App Store and Google Play.
Apple caps both the app title and the subtitle at 30 characters each, and the hidden keyword field at 100 characters. Our App Store ASO checker flags when your title or subtitle is over the limit or leaving characters unused; Apple keeps the keyword field private, so no outside tool can check it.
Fill the 100-character keyword field with single, comma-separated terms and no spaces (e.g. budget,planner,expense). Don't repeat your app name, category, or words already in your title and subtitle, Apple indexes those automatically, and rely on Apple's stemming instead of adding plurals.
Yes. Apple Ads (formerly Apple Search Ads) uses your keyword metadata and listing relevance to determine which searches you can bid on and how relevant your ad is. A well-optimized listing lowers your cost per tap and improves ad placement, so ASO and Search Ads compound.
Start with the highest-weighted fields: put your primary keyword in the title and subtitle, fill the 100-character keyword field with non-duplicate terms, add at least five scenario-based screenshots, and keep your rating above 4.0. Run your listing through this free App Store ASO checker to see which of the public ones you're missing (Apple keeps the keyword field private) and the exact fix for each.
Apple gives you a hidden 100-character keyword field, plus the keywords you place in your 30-character title and 30-character subtitle. There's no fixed 'number' of keywords, it's about how many you can fit across those fields without duplicating, since Apple only needs to index each term once.
The App Store app title is capped at 30 characters, the subtitle at 30 characters, and the hidden keyword field at 100 characters. Our checker flags a title or subtitle that's over the limit or wasting unused characters; the keyword field is private to Apple, so no outside tool can check it.
Optimize the fields Apple indexes (title, subtitle, keyword field) around the terms you want to rank for, raise your conversion rate with stronger screenshots, keep your rating above 4.0, and update regularly. All of that is free, this ASO checker shows you exactly where to focus first.
The most common reasons are a keyword that isn't in your title, subtitle or keyword field, a rating below the ranking floor, a stale listing that hasn't been updated in months, or strong competitors out-ranking you for that term. The checker surfaces which of the public signals apply to your listing.
More ASO tools

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App Rank CheckerSee exactly where your app ranks for a keyword, country by country.Open tool Google Play ASO CheckerScore your Android listing against Play Store ranking factors.Open tool App Store ASO GeneratorGenerate an optimized iOS title, subtitle and description with AI.Open tool
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