App Store Optimization: A Practical ASO Guide

App Store Optimization (ASO) is the practice of improving how your app ranks and converts inside the App Store and Google Play. Apple reports that default product pages convert at an average of 1.6%, which means your metadata, creatives and ratings decide most of your organic installs — not your ad budget.

That number surprises most teams. They spend months on the product, then spend real money driving traffic to a store page nobody has ever measured. Every one of those paid clicks lands on the same page your organic visitors see, so a weak product page quietly taxes every channel you run.

Most ASO advice stops at "put keywords in your title." Real ASO means knowing both stores' published rules, placing the right words in the right fields, testing your creatives, and reading the results in Console data. This guide walks through all of it using Apple's and Google's own documentation rather than folklore.

Table of Contents

• What Is ASO and How Is It Different From SEO?
• What the Store Algorithms Actually Rank
• Metadata Fields: Character Limits and Weight
• How to Do App Store Keyword Research
• On the App Store: Tags and Custom Product Pages
• On Google Play: Ask Play and Custom Store Listings
• Creative Optimization: Icon, Screenshots, Video
• Ratings and Review Management
• How to Run Store Page A/B Tests
• Localization: Where Teams Leave Installs Behind
• Which Metric Tells You What
• A 30-Day ASO Action Plan
• 8 Common ASO Mistakes
• Frequently Asked Questions

What Is ASO and How Is It Different From SEO?

ASO and SEO share one idea: someone searches, and you want to appear. The execution diverges sharply from there, and applying SEO habits to a store listing is the most common failure mode.

The first difference is space. On a web page you can write as much as you want. On the App Store you get a total of 160 indexable characters: a 30-character name, a 30-character subtitle and a 100-character keyword field. Every character is a decision.

The second difference is that user behaviour replaces backlinks. In SEO, external links carry much of the authority. In the stores, installs, engagement, uninstalls and ratings do that work. Apple says so plainly: rankings depend on text relevance and on customer behaviour such as downloads and the number and quality of ratings.

The third difference is that conversion happens on the same screen. A Google searcher clicks through to your site and then moves through a funnel. A store visitor searches, decides and installs in one place, which is why creative work matters as much as copy in ASO.

The fourth difference is speed. A web page can take weeks to show a ranking change. Swap your first screenshot and conversion rate responds within days. ASO is unusually fast to learn from.

Finally, scope. ASO is not only about search. Category charts, editorial features, similar-app recommendations and now AI-driven recommendation surfaces all count as in-store discovery. Once you publish on the App Store and Google Play, the real work starts.

What the Store Algorithms Actually Rank

Neither store publishes its formula, but both publish their factor lists. Start there instead of guessing.

Apple's discoverability page splits ranking into two buckets. Text relevance covers matches for the app's title, keywords and primary category. Customer behaviour covers downloads and the number and quality of ratings and reviews. Note what is missing from that list: the long description.

Google's app discovery and ranking page names five factors: user relevance, app quality, editorial value, ads and user experience. It also states that apps are ranked on a combination of ratings, reviews, downloads and other signals.

Google's "app quality" bucket is the one most teams miss. It covers technical performance, not just your listing. If Android Vitals shows high crash or ANR rates, no amount of keyword work will fully unlock your visibility.

There is one more practical split. On Play, the long description is indexed and the whole text feeds search. On the App Store, the description is a conversion asset rather than a ranking signal. Copying one text into both stores therefore underperforms in both.

Metadata Fields: Character Limits and Weight

The table below puts both stores' official limits side by side. Print it before you plan anything, because your whole keyword map has to fit inside it.

Two rules make Apple's keyword field go further. Separate terms with commas and do not add a space after the comma; spaces are only for multi-word phrases. That alone buys you five to ten extra characters.

The second rule matters more. Do not repeat a word across the name, subtitle and keyword field. Repetition does not raise your ranking, it just burns characters. Treat the three fields as one shared pool and divide the words between them.

Play works the other way around. Having your key phrase appear naturally a few times in the long description does help. But Google's store listing best practices tell you not to repeat the short description inside the long one and not to over-repeat keywords.

Promotional text is an App Store advantage worth using. Those 170 characters can be updated any time without shipping a new build. Use it for launches, seasonal offers or a new feature; it will not move rankings, but it will move conversion.

How to Do App Store Keyword Research

Keyword research is the foundation of ASO, and it should not be improvised. These five steps are enough to build a working keyword map from scratch.

1. Collect raw material. Pull the names, subtitles and short descriptions of competing apps into a sheet. Add the phrases that show up in your own reviews, because users describe your product in their words, not your marketing language.

2. Mine store autocomplete. Type your root term into the App Store and Play search boxes and record the suggestions. Those suggestions are ordered by genuine search demand and they cost nothing.

3. Group by intent. Sort terms into three buckets: brand searches, category searches such as "booking app", and problem searches such as "salon appointment tracker". Category terms bring volume with heavy competition, problem terms bring less volume and far better conversion.

4. Score relevance and difficulty. Ask two questions per term. Can we realistically reach the top ten here? Is the person typing this actually looking for our app? Drop anything that fails either question.

5. Distribute across fields. Put your strongest single term in the app name. Put your second phrase in the subtitle. Spread the rest across Apple's 100-character field and, on Play, across the short and long descriptions.

New apps should not chase head terms. Ranking first for a long-tail phrase beats ranking fortieth for a broad one, every time. As your install base grows, the stores will let you climb toward the broader terms.

Revisit the map quarterly. Store search demand is seasonal, and competitors rewrite their metadata often enough to reshuffle the field.

On the App Store: Tags and Custom Product Pages

Apple has added two capabilities that change ASO practice, and teams that ignore them leave a real advantage on the table.

The first is app tags. Apple's app tags documentation explains that tags are produced from a combination of the metadata you enter in App Store Connect, artificial intelligence and human curation. Tags appear in search results, on the Search Landing Page and on your product page.

Two details decide how you work with them. Tags are generated from your en_US locale metadata only, so your English copy now shapes your tag pool rather than just your US listing. You also cannot add tags yourself — you can only deselect the ones you do not want, and Apple warns that deselecting all of them may hurt discoverability.

The second is custom product pages. Apple's own page states you can publish up to 70 additional versions of your product page per app. Each one carries its own screenshots, app previews, promotional text and a unique URL.

These pages are submitted for review independently of an app binary, so you do not need a release to launch one. Apple reports an average 2.5 percentage point lift in conversion when people are referred to a custom product page, which it frames as a 156% increase over the 1.6% average conversion rate of default pages.

In practice, this means visitors from an Instagram campaign no longer have to see the same screenshots as visitors from a search ad. You build a page per audience and measure each channel separately.

On Google Play: Ask Play and Custom Store Listings

The bigger shift in 2026 happened on Play. In its I/O 2026 announcement, Google rebuilt in-store discovery around AI.

Ask Play is a conversational search layer that understands the full context of a question and adapts to follow-ups. On the results page, Ask Play highlights summarise complex searches. Users increasingly describe a need in a sentence instead of typing a single keyword.

The ASO consequence is direct. Copy that is packed with head terms cannot answer a sentence-shaped need. Your description should state plainly who the app is for, which problem it solves and how. Clear benefit sentences now outperform keyword stacking.

The same announcement introduced Play Shorts, a full-screen vertical video feed, and app discovery inside the Gemini app on Android and web. Google also showed Gemini generating custom store listings from keyword recommendations. None of these tools produce anything useful on top of weak base metadata.

Custom store listings remain Play's strongest targeting feature. Google's documentation describes using them to target users in different countries, pre-registered users, people searching specific keywords, and inactive users — each reachable through a unique listing URL.

Then there is policy. Google's metadata rules ban emoji, repeated special characters and all-caps text outside brand names in your title, icon and developer name. Performance claims such as "#1", "App of the year" or "Popular" are prohibited, as is promotional copy like "10% off". Violations can cost you a release, so it is worth reading the common store rejection reasons before you write anything.

Creative Optimization: Icon, Screenshots, Video

Copy gets you into the results list. Creatives win the install. Users scan a listing in well under a second and decide largely on the icon and the first images.

On the App Store you can upload up to 10 screenshots and 3 app previews. Previews run to a maximum of 30 seconds and autoplay muted. When there is no preview, the first one to three screenshots appear in search results, so your core message has to fit into those frames.

On Play, the icon is 512x512 pixels and the feature graphic is 1024x500. You need at least two screenshots to publish, but to qualify for Google's promotional surfaces an app needs at least four screenshots at 1080p, with a maximum of eight per device type.

Three rules make screenshots work. Put your single strongest benefit, with a short caption, in the first image. Give each following image exactly one feature. Set the caption type large enough to read on a phone, because designs that look elegant on a desktop mockup become illegible in a results list.

Video follows one rule: make it obvious what the app does within five seconds. On Play, previews are added as a YouTube URL, and ads must be disabled on that video for it to show in the store.

One detail teams forget is dark mode. Apple suggests showing dark mode in your screenshots if your app supports it. Seeing their own device theme reflected on your page builds trust before the install.

Ratings and Review Management

Ratings affect both ranking and conversion. Apple explicitly counts the number and quality of ratings among its ranking factors, and Google lists ratings and reviews among its ranking signals.

Play has one helpful nuance. Google states that the rating shown to users is weighted toward more recent ratings so it reflects the changes you make. Bad reviews from three years ago do not hold your score hostage forever once you fix the underlying issue.

On the App Store, the summary rating is calculated per territory. You may reset it when you ship a new version, but Apple advises using that sparingly. Resetting does not remove written reviews, and a page showing very few ratings discourages downloads.

Asking for ratings has a technique too. Apple's SKStoreReviewController API limits you to three rating prompts per app in a 365-day period. Do not spend those three chances at random — trigger them right after a user completes something successfully.

Replying to reviews is the cheapest ASO work available. On the App Store you can respond to every review regardless of when it was written, and the reviewer gets notified. Users whose problem you solve frequently raise their score.

Set a concrete routine: one hour per week to answer every one-to-three-star review from that week, and a standing agenda item to push recurring complaints into the product backlog. Within a few months this visibly lifts the average.

How to Run Store Page A/B Tests

Creative debates end with data, not opinion. Both stores provide free A/B testing, and their rules differ in ways that matter.

Apple's tool is Product Page Optimization. Its documentation confirms you can test up to three alternate treatments against your original page, covering icons, screenshots and previews. Text fields are not testable.

Treatments are shown to users on iOS 15 and iPadOS 15 or later, and your app must be in the Ready for Distribution state. Results land in App Analytics, where Apple combines estimated conversion lift with confidence algorithms to identify the winner.

Google's tool is store listing experiments. Per the Play Console docs, you can run either one default graphics experiment or up to five localised experiments at a time, testing up to two variants against your current listing. Experiments stop automatically after six months.

Google's real advantage is that localised experiments can also test your descriptions. Since Apple gives you no way to test copy, Play is where you validate text decisions and then apply what you learn.

Avoid three test-design mistakes. Do not change several elements at once, or you will never know what won. Do not stop after two days, because weekday and weekend traffic behave differently. Do not start a test during a campaign spike, since the traffic mix will not represent your normal audience.

Localization: Where Teams Leave Installs Behind

The App Store is available in 175 regions and supports metadata localisation in more than 40 languages. Most teams still ship one English listing and quietly forfeit every search performed in another language.

Localisation is not translation. A literal translation of your subtitle usually loses the keyword that people in that market actually type. The right process is to run the five research steps again in the target language and then write fresh copy around the winners.

Three technical details recur across markets. Watch how the language forms plurals and suffixes, since users search both forms. Watch accented characters, because many people type without them. And keep high-value English loanwords such as "tracker" or "scanner" where local users genuinely search for them.

Your English copy now does double duty. Because Apple generates app tags from en_US metadata, the quality of your English listing shapes your tag pool even in markets where English is not spoken.

Localisation also includes price. If you sell subscriptions, set price tiers per market deliberately rather than letting automatic conversion decide. A badly chosen tier undermines the entire monetization model you built the app around.

Which Metric Tells You What

ASO cannot be managed without measurement, and both stores hand you the data free. The table below maps each metric to the problem it exposes.

Know how Apple defines conversion rate: total downloads divided by unique impressions, with redownloads included in the total. Do not compare that figure one-to-one with the conversion number in your ad platform.

Play offers something Apple does not: peer benchmarks. When there is enough data, the listing conversion analysis screen compares your click-through rate against a peer set of similar apps. Benchmarking against peers sets a far more honest target than benchmarking against your own past.

Make measurement a weekly ritual. Open both consoles every Monday and log conversion rate and average rating in a sheet. After four weeks, the effect of each change you made becomes obvious.

A 30-Day ASO Action Plan

Treat ASO as an infinite project and you will never start it. This four-week plan is designed to produce the first measurable improvement on an app that is already live.

Follow one discipline while you run it: never change copy and creatives in the same week. Change both together and you will not be able to attribute the improvement to either.

Be patient after week two. Store search indexes usually pick up metadata changes within days, but rankings need two to three weeks to settle. Do not revert before that window closes.

If you want a pre-launch checklist to work from, our app launch checklist tool walks through store metadata fields, asset requirements and policy items as tickable steps.

8 Common ASO Mistakes

These are the issues we find most often when auditing store listings. Each one is cheap to fix and expensive to leave alone.

• Copying one text into both stores. Descriptions are a search signal on Play and a conversion asset on the App Store. One text serves neither well.
• Using the title for the brand name alone. If nobody searches your brand yet, you have spent all 30 characters on nothing.
• Repeating a keyword in all three fields. Ranking does not improve and characters are lost.
• Treating screenshots as a design showcase. Screenshots must sell a benefit; aesthetics come second.
• Prompting for ratings on first launch. Users who have not seen value rate low, and one of your three annual prompts is gone.
• Leaving negative reviews unanswered. Answered reviews are often updated; unanswered ones sit on your page forever.
• Writing copy without reading store policy. Phrases like "#1" or "50% off" are outright policy violations on Play.
• Separating technical quality from ASO. Google names app quality as a ranking factor, so crash rates shape visibility.

Use that list as an audit form. Checking eight items against your own listing takes half a day and usually surfaces at least three fixes.

Choosing the right store comes before any of this. If resources are tight, picking one launch platform and building a genuinely strong page there beats an average presence in both.

Frequently Asked Questions

What is app store optimization?

App store optimization (ASO) is the practice of improving an app's visibility and install conversion inside the App Store and Google Play. It covers the app name, keywords, descriptions, creatives and ratings, and its goal is to raise organic installs.

How is ASO different from SEO?

SEO targets rankings on web search engines, while ASO targets rankings inside app stores. ASO gives you far less text to work with, and install volume, ratings and engagement replace backlinks as the dominant authority signal.

How long does ASO take to show results?

Metadata changes are usually indexed within a few days, and ranking effects settle over two to three weeks. Creative changes show up faster, since conversion rate responds within days of an A/B test starting.

How many characters is the App Store keyword field?

The App Store keyword field holds 100 characters in total and is never shown to users. Terms are separated by commas with no space after the comma, which lets you fit more phrases into the limit.

Does the Google Play long description affect search?

Yes. Play indexes the 4,000-character long description and uses it in search. Google does warn against repeating the short description inside it and against excessive keyword repetition, which can be treated as a policy violation.

Do ratings really affect app store rankings?

Yes. Apple explicitly lists the number and quality of ratings and reviews among its ranking factors, and Google lists ratings and reviews among its signals. On Play, the displayed rating is weighted toward recent ratings.

Is store page A/B testing free?

Yes. Apple's Product Page Optimization and Google's store listing experiments are both included with your developer account. Apple allows up to three alternate treatments, while Play allows up to two variants against your current listing.

Can my own team handle ASO in-house?

Yes, the core work can stay in-house. Keyword research, copywriting and review management are all internal tasks, while creative production and test design usually benefit from outside support.

ASO is not a one-time project. Getting the metadata right produces a visible lift in the first month, but the durable gains come from a repeating cycle of measurement, testing and review management. Your store page is the door every acquisition channel passes through, and widening that door costs far less than buying more traffic.

If you want a second opinion on how your listing is performing, our mobile app development team can audit your current page and return a prioritised list of fixes. If you are planning a new app, get in touch and we will walk through the process with you.