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 iOS listing against the factors Apple actually ranks — title, subtitle, keyword field, ratings and screenshots — and tell you the highest-impact fixes first.
Quick answer
Updated June 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, hidden keyword field, screenshots and ratings on a 0–100 scale 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
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.
We fetch & analyze your live listing
In a few seconds we pull your real title, subtitle, screenshots and ratings, then run 18 weighted ASO checks against App Store best practices.
See your score & unlock the full fix list
Your 0–100 score and grade appear instantly, free. Log in 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 one of those surfaces, 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 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.
App 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.
Subtitle (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.
Keyword field & keyword strategy
The hidden 100-character keyword field is where you place terms you can't fit naturally in the title and subtitle. We assess your keyword coverage, front-loading and signs of keyword stuffing that Apple penalizes.
Screenshots & app preview
The 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.
Ratings & reviews
Average 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.
Description, freshness & conversion copy
Your 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.
Wasting the title on the brand name alone
A 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.
Duplicating keywords across title, subtitle & keyword field
Apple 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.
Stuffing the description with keywords
Apple 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.
Ignoring the 100-character keyword field formatting
Use 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.
Letting the rating sit below 4.0
Average 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 limit | 30 characters (indexed) | 30 characters (indexed) |
| Second field | Subtitle — 30 characters (indexed) | Short description — 80 characters (indexed) |
| Dedicated keyword field | Yes — hidden, 100 characters | No |
| Description indexed for search | No | Yes — full 4,000 characters |
| Built-in A/B testing | Custom Product Pages | Store Listing Experiments |
| Localization | Each locale indexed separately | Each locale indexed separately |
| Primary creative | Screenshots & app preview video | Screenshots, feature graphic & video |
| Paid search platform | Apple Search Ads | Google App Campaigns |
Frequently asked
App Store ASO, answered
What is a good ASO score for an App Store listing?
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.
Is this App Store ASO checker free?
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. Creating a free account unlocks the full per-check report with AI-written fixes written for your specific listing.
Does Apple index my app description for search?
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. That's why our checker puts the most emphasis on those fields — the description still matters for conversion, but not for keyword rankings.
How does the ASO score get calculated?
We fetch your live App Store listing and run 18 weighted 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.
Can I check a competitor's App Store ASO score?
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.
What's the difference between App Store and Google Play ASO?
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.
How long is the App Store title and subtitle limit?
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 any of these fields are over the limit or leaving characters unused.
How do I optimize the App Store keyword field?
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.
Does App Store Optimization help with Apple Search Ads?
Yes. 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.
How do I improve my App Store ASO score?
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 these you're missing and the exact fix for each.
How many keywords can I use on the App Store?
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.
What is the character limit for an App Store title?
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 any field that's over the limit or wasting unused characters.
How do I rank higher on the App Store for free?
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.
Why is my app not showing up in App Store search?
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 these apply to your listing.
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