Quick Answer
App store optimization (ASO) is improving how often your app is found in store search and how often a visitor installs. It has two halves: discoverability (keywords in the fields each store indexes) and conversion (icon, screenshots, preview video, rating and copy on the listing). The two stores work differently. Apple indexes the app name, subtitle and a hidden 100-character keyword field. Google Play indexes the title, short description and the full description. Apple's standard product page optimization workflow focuses on icons, screenshots and app previews, while Google Play lets you test graphics and, for localized experiments, text. A reliable ASO routine is: research keywords by relevance and conversion, map them to the right fields, test one creative change at a time, and keep your test data clean. The last point is the one most guides skip. Conversion rate is only meaningful if the visitors are real, so keep paid or invalid traffic from muddying the listing data. If you buy traffic through adult or alternative ad networks, JuicyTraffic provides click fraud protection and ad tracking built for adult traffic.
Why ASO Guides Contradict Each Other
Search for ASO advice and you will find rules that conflict. Here is where.
"Apple has no A/B testing." That advice is outdated. Apple's product page optimization lets you test up to three alternate versions of your product page against the original and view results in App Analytics.
"You can test your subtitle." Some guides say product page optimization covers the subtitle. Apple's main product page optimization guide lists icons, screenshots and previews. Its newer Analytics help also mentions descriptions, so the public documentation is not fully consistent. Do not assume every text field is available: check the treatment editor in your account. Name, subtitle and keywords follow the normal metadata workflow.
Google Play title length. Some guides still say 50 characters. Google's Play Console Help lists a 30-character app name, an 80-character short description and a 4,000-character full description. The title limit was cut from 50 to 30 in 2021.
How many variants Google allows. Third-party guides say three. Google's Play Console Help says you can choose up to two variants at present, with up to five localized experiments or one default graphics experiment running at a time. Check your console, since limits can change.
"Keyword field is 100 characters." Apple's product page documentation says 100 characters, comma-separated without spaces around the commas; spaces within multiword phrases are allowed. App Store Connect Help words it as 100 bytes. In English they are the same, but they differ in languages with accented or non-Latin characters.
Benchmarks. Guides quote "good" conversion rates and test lift ranges that do not agree and are rarely sourced. Treat them as anecdotes, and measure against your own baseline.
The Two Stores, Field by Field
| Field | App Store (Apple) | Google Play |
|---|---|---|
| Name or title | 30 characters; indexed | 30 characters; indexed |
| Subtitle or short description | Subtitle: 30 characters; indexed | Short description: 80 characters; indexed |
| Keyword field | Up to 100 bytes in App Store Connect Help; hidden, comma-separated; spaces within phrases allowed | None |
| Long text | Description up to 4,000 characters; promotional text up to 170 characters | Full description up to 4,000 characters; indexed |
| Screenshots | Up to 10 per localization | See Play Console for current asset limits |
| Video | Up to 3 app previews, up to 30 seconds each | Promo video |
| Native testing | Product page optimization: icon, screenshots, previews; up to 3 treatments | Store listing experiments: graphics, plus text on localized experiments |
| Metadata changes | Name, subtitle and keywords change with a new version | Edited in Play Console |
Two store-specific rules matter. On Apple, text you test must go through normal metadata updates, and any new treatment assets must be approved by App Review. On Google Play, repetitive or irrelevant use of keywords in the name or description can cause an app to be suspended, so keyword stuffing carries a real risk.
A Practical ASO Workflow
Step 1: Research keywords by relevance and conversion
List the terms people would use to find an app like yours, then check each for three things: relevance to what the app does, competition, and conversion potential. A term that earns impressions but no installs wastes a metadata slot. If you run paid store campaigns, tap-through and conversion by keyword show which terms deliver. Low-budget probing campaigns can test a keyword's relevance before you commit metadata space to it.
Step 2: Map keywords to fields
- Apple: put your strongest keyword in the name, a second tier in the subtitle, and fill the keyword field within the limit validated by App Store Connect with additional terms that you have not used elsewhere. Write for people first.
- Google Play: use the title and short description for your main terms and write the full description naturally. Google indexes the full description, but repetition is a policy risk.
Keep a sheet of every keyword, the field it lives in, and the date you changed it.
Step 3: Build creatives that convert
Your icon, first screenshots and preview video do most of the converting. Lead with the benefit, not the feature list, make the first two or three screenshots stand on their own, and localize your top markets. Vendor benchmarks claim large lifts from new screenshots and videos, but treat those as hypotheses to test.
Step 4: Test one change at a time
| Apple product page optimization | Google Play store listing experiments | |
|---|---|---|
| You can test | Standard workflow: app icon, screenshots, app previews; confirm available fields in your account | Graphics; text too on localized experiments |
| Variants | Up to 3 treatments against the original | Check console; Google's help currently says up to 2 variants |
| Traffic split | You set the share; for example 30% across three treatments gives each 10% | You set the audience percentage and a minimum detectable effect |
| Limits | Not available for custom product pages | One default graphics experiment, or up to five localized ones, at a time |
| You cannot test | Name, subtitle, description, keywords | Beyond what the experiment types allow |
Test one asset at a time, decide the success metric before you start, and do not stop early on a fluctuating result. Apple product page optimization runs for up to 90 days, and Google Play experiments stop automatically after six months. A low-traffic test may reach its time limit without a conclusive result; consider fewer variants or a larger meaningful change.
Step 5: Keep the data clean
Define the conversion metric before comparing reports. Product-page views to installs is one useful funnel measure, but native experiment dashboards can use different denominators and outcomes. Apple's experiment results include unique impressions and the share of viewers downloading the app; Google Play lets you select install, open or pre-registration metrics. Paid traffic can change audience intent, and invalid activity in external click or session data does not automatically mean it entered the store's measured denominator. To protect your reads:
- Separate paid from organic. Use dedicated campaign links and, where appropriate, Apple's custom product pages and Google's custom store listings to segment paid campaigns. Routing helps analysis but does not automatically isolate paid traffic: custom product pages can also appear in search when configured with keywords. Google lets you run experiments on custom store listings, while Apple's product page optimization tests are not available for custom product pages.
- Use supported campaign attribution links or a mobile measurement system for every source in your campaign links, so you can compare conversion by source.
- Do not change paid campaigns mid-test. A new source or budget change changes the audience you are measuring.
- Check for invalid traffic when installs fall far below clicks, or when one source shows high views and almost no installs.
Step 6: Measure and iterate
Track impressions, product page views, conversion rate, installs and keyword rankings. After each metadata change, monitor ranking estimates, impressions and conversion where the store or paid-search reports expose that breakdown. Organic keyword-level conversion is not comprehensively available from both stores. Apply winning creatives, log the result, and schedule the next test. Refresh metadata on a regular cadence, because markets and competitors move.
What ASO Tools Cannot Tell You
- Keyword volume figures are estimates from third-party tools, not exact counts from the stores.
- Rankings move constantly, so judge changes over weeks, not hours.
- Benchmarks are not targets. Use your own baseline and category.
- Metadata changes on Apple need a new version, so you cannot iterate daily the way you can with ads.
- Experiments measure the configured store outcome, not lifetime value. Check retention and revenue after applying a winner.
Common Mistakes
- Stuffing keywords into Google Play text, which can lead to suspension
- Repeating the same keyword across Apple's name, subtitle and keyword field instead of using different terms
- Testing several changes at once, so you cannot tell what worked
- Trying to A/B test text on Apple through product page optimization
- Stopping a test early or running it with too little traffic
- Mixing paid and organic traffic in one conversion number
- Copying a competitor's keywords without checking relevance and conversion
- Never refreshing screenshots after features or markets change
Checklist
- Keywords chosen on relevance, competition and conversion
- Every keyword mapped to a field, with no needless repeats
- Apple name and subtitle within 30 characters, keyword field validated within App Store Connect's limit (Help specifies 100 bytes)
- Google Play name within 30, short description within 80, full description natural and under 4,000
- First two or three screenshots carry the main benefit
- Top markets localized
- One test running at a time, with the success metric set in advance
- Paid campaigns routed to custom product pages or custom store listings
- Every traffic source tagged
- Retention checked after applying a winner
- Next audit scheduled
Where Traffic Quality Fits
ASO improves discoverability and listing conversion, but listing metrics alone do not establish the validity of upstream paid clicks. If part of your install traffic is paid, particularly from adult or alternative ad networks where bots, click farms and invalid clicks are harder to spot, invalid upstream activity can inflate acquisition costs and distort external attribution; investigate whether it affected the store metrics rather than assuming it did. JuicyTraffic provides click fraud protection and ad tracking built for adult traffic. It helps advertisers investigate landing-page click quality by source and compare that evidence with downstream conversions. Store analytics or an appropriate mobile measurement system is still needed to measure installs and retention.
FAQ
What is app store optimization? The practice of improving an app's visibility in store search and its conversion from listing views to installs, on the App Store and Google Play.
How is ASO different on Apple and Google Play? Apple indexes the name, subtitle and a hidden 100-character keyword field. Google Play indexes the title, short description and full description.
Can I A/B test my app listing on iOS? Yes. Apple's product page optimization tests app icons, screenshots and app previews, with up to three treatments against your original. Confirm supported fields in your treatment editor; the main workflow does not expose name, subtitle or keywords as creative variants.
Can I A/B test text on Google Play? Localized experiments can test text and graphics for the languages you choose. Default graphics experiments test graphics in your default language.
How long should an ASO test run? Until it has enough traffic to reach a reliable result, which depends on your listing's traffic and the size of the difference you want to detect. Do not stop early on a fluctuating result.
What is the App Store keyword field? A hidden field of up to 100 characters, comma-separated without spaces around the commas; spaces within multiword phrases are allowed, that helps determine where your app appears in search.
How many characters can a Google Play title have? 30. The short description is 80 characters and the full description is 4,000.
Do paid campaigns affect ASO? They can affect your conversion data if paid traffic is mixed with organic visits. Route paid campaigns to custom product pages or custom store listings and tag each source.
What is a good conversion rate? Benchmarks vary widely and are rarely sourced. Compare your own rate over time, by market and by source, rather than chasing a generic number.
How often should I update my listing? Refresh metadata and creatives when a major feature ships, when conversion drops for a sustained period, or on a regular audit cycle.
Next Steps
ASO works when you treat each store's rules as they are: the right keywords in the fields that are indexed, one creative test at a time, and clean data behind every conversion number. If your install traffic includes adult or alternative ad networks, JuicyTraffic provides click fraud protection and ad tracking built for adult traffic, so more of your budget reaches real visitors.
References
Related Articles
- Mobile Split Testing: How to Keep Bot Traffic From Ruining Your A/B Test Results
- High Intent Keywords: How to Find Keywords That Convert
- How Invalid Traffic Distorts ROAS and Campaign Analytics
About the Author
Dylan Dan is the founder of JuicyTraffic. He has spent 15 years specializing in adult advertising and ad-fraud prevention, helping advertisers assess traffic quality, identify invalid clicks and protect media budgets across dedicated ad networks.