App Store Optimisation 2026: The Seven-Lever Technical Guide
What ASO actually is, the seven specific levers that affect ranking and conversion, the iOS vs Android platform difference most guides get wrong, and the honest answer on when it is worth investing in.
CV Infotech builds iOS and Android applications and provides ASO services covering keyword research, metadata optimisation, creative design, and rating acquisition strategy. We handle the technical ASO elements — deep linking, rating prompt implementation, and crash monitoring — through the same team that builds the app.
Most app owners treat ASO the same way businesses treated SEO in 2012 — as something that happens after the app is finished, if they remember to do it.
The result is the same: they miss most of their organic discovery potential and compensate with paid user acquisition that costs more than it should. Industry data consistently shows that approximately 70 percent of app downloads begin with a search in the App Store or Google Play. An app that has not been optimised for those searches is invisible to the majority of people actively looking for what it does.
This guide covers what ASO actually is, the seven specific levers that affect ranking and conversion, the platform difference between iOS and Android that most guides get wrong, what it costs at Indian agency rates, and the honest answer on when ASO is worth investing in and when it is not.
The most common ASO mistake we see is optimising for more impressions when the real problem is poor conversion on existing impressions. Fix conversion first.
iOS vs Android: The Platform Difference That Matters
The most important difference between iOS and Android ASO is indexation scope. On the iOS App Store, only three text fields are indexed for search: the app name, the subtitle, and the keyword field. The long description is visible to users but is not indexed. On Google Play, the long description is indexed in addition to the title and short description. The keyword field does not exist on Android.
The practical implication: iOS ASO is a keyword placement exercise within three fields totalling 160 characters. Android ASO requires keyword placement across a title, short description, and up to 4,000 characters of long description. The strategy differs materially between platforms, and an ASO programme that applies the same approach to both will underperform on at least one of them.
The Seven ASO Levers
App name and title
The app name is the highest-weight text field in both stores. On iOS, the app name is limited to 30 characters and appears directly in search results. On Android, the title is also 30 characters. Keywords placed in the app name carry significantly higher weight than keywords placed in any other field. This is the most common ASO error: app names that prioritise brand identity over keyword placement when the brand has no existing search recognition.
Practical tip: Include your primary keyword in the app name, not just your brand name. If your brand is not yet a search term, the name field is your most valuable keyword placement.
Subtitle (iOS) and short description (Android)
iOS provides a 30-character subtitle field that is indexed and displayed below the app name in search results. Android provides an 80-character short description that is indexed and shown in browse surfaces. Both fields are underutilised. Most apps use them for a marketing tagline rather than for keyword placement. The effective use is a secondary keyword phrase that complements the app name and addresses a search intent the name does not cover.
Practical tip: The iOS subtitle and Android short description are the second and third highest-weight keyword fields after the title. Use them for keywords, not slogans.
Keyword field (iOS only)
The iOS keyword field is 100 characters, not visible to users, and exclusively for the App Store search algorithm. It is similar to the meta keywords tag in early SEO — invisible to users but directly used by the ranking algorithm. The most common mistakes: repeating keywords already in the name or subtitle (wasted characters), using singular and plural of the same word (iOS handles this automatically), and failing to include competitor-adjacent keywords and alternative search terms.
Practical tip: Do not repeat words from the app name or subtitle in the keyword field. Do not add spaces after commas. Use the full 100 characters with unique, relevant keywords.
Screenshots and preview video
Screenshots and preview video do not affect search ranking directly. They affect conversion rate — the percentage of users who, after seeing your store listing, choose to download the app. For most apps, improving conversion on existing impressions delivers faster returns than improving search ranking. The most common conversion problems: first screenshot shows a feature or UI that does not communicate the core value proposition, screenshot annotations are too small to read on mobile, no preview video despite evidence that video improves conversion in the category.
Practical tip: Test your screenshots by showing them to someone unfamiliar with the app. If they cannot explain what the app does from the screenshots alone in 10 seconds, the visual conversion layer needs work.
Ratings and reviews
Average star rating affects both ranking and conversion. Apps below 4.0 stars are algorithmically disadvantaged in both stores. The most effective method for improving ratings is implementing the native review prompt (SKStoreReviewRequestAPI on iOS, in-app review API on Android) at a moment of demonstrated user satisfaction — after a task completion, after a streak, after a positive outcome — not on first launch or on every session. Responding to negative reviews publicly also affects conversion: a developer response on a 1-star review that shows genuine engagement reduces the conversion penalty of that review.
Practical tip: The timing of the native review prompt is the single most controllable variable in your rating trajectory. Prompt after a user action that confirms engagement, not at first open.
Download velocity and retention signals
Both stores use download velocity (rate of new installs per day) and retention signals (how many users open the app after installing it) as ranking factors. These are not directly controllable through ASO alone — they are downstream of acquisition strategy and app quality. However, the ASO implication is important: a burst of low-quality installs from a paid campaign that results in low retention can negatively affect organic ranking. Paid UA and ASO must be coordinated, not run independently.
Practical tip: If you are running paid user acquisition alongside an ASO programme, track post-install retention by acquisition source. Low retention from certain paid channels has organic ranking implications.
Localisation
Each country's App Store and Play Store listing is a separate indexation opportunity. A UK listing, a US listing, and an Australian listing each have independent keyword fields, and the algorithm surfaces results based on the user's store region. An app that has only been optimised for one English-speaking locale is missing ranking opportunities in every other English-speaking market. Non-English locales multiply this further. Most apps leave the localisation layer entirely unoptimised, which is the single highest-leverage untouched opportunity for apps with genuine multi-market potential.
Practical tip: English locale variants (en-US, en-GB, en-AU) have separate keyword fields. Even without translating the app, localising the metadata for each English-speaking market is a quick win for multi-market apps.
ASO Service Costs: India vs US Agency
| Service | India (CV Infotech) | US or UK agency |
|---|---|---|
| One-time ASO audit | $500–$2,000 | $2,000–$6,000 |
| Monthly ASO retainer | $500–$1,500/mo | $2,000–$8,000/mo |
| Screenshot redesign (both stores) | $800–$2,500 | $3,000–$8,000 |
| Full ASO setup (new app) | $1,500–$4,000 | $5,000–$15,000 |
Frequently Asked Questions
App Store Optimisation (ASO) is the process of improving an app's visibility and conversion rate in the iOS App Store and Google Play Store. It works on two levels: ranking, which affects how high the app appears in search results for relevant keywords, and conversion, which affects how many people who see the app download it. The ranking signals include the app's title, subtitle (iOS) or short description (Android), keyword metadata, download velocity, and ratings. The conversion signals include screenshots, preview video, icon design, and average star rating. Effective ASO requires working both levels simultaneously because high ranking with low conversion produces poor results, and high conversion with low ranking produces none.
ASO is worth investing in when your app targets keywords with meaningful search volume, your app's conversion rate on existing impressions is below the category benchmark, or you are in a category where organic search discovery is a realistic acquisition channel. It is not worth the primary investment when your app's target audience does not search for apps of your type, when your category is dominated by two or three apps with ten times your download volume (you can rank but not displace them), or when your primary acquisition channel is paid UA or referral and organic is a secondary consideration. The most reliable return from ASO comes from fixing conversion problems on existing impressions before optimising for new impressions.
Metadata changes (title, subtitle, keywords) typically begin affecting rankings within 48 to 96 hours of an app update. Screenshot and icon changes affect conversion rate immediately after the update is approved. Rating improvements affect ranking gradually as the new rating average accumulates. A sustained ASO programme typically shows measurable organic download improvement within 30 to 60 days of implementing the initial changes, and continues improving as the changes compound with ongoing iteration. Expecting significant ranking changes in under two weeks is unrealistic. Expecting no visible signal in under 90 days suggests either the changes were not significant or the search volume for the target keywords is too low to produce visible movement.
The most important difference is indexation scope. On the iOS App Store, only the app name, subtitle, and keyword field (100 characters, comma-separated) are indexed for search. The description is not indexed and has no effect on ranking — it is for conversion only. On Google Play, everything is indexed including the full description (up to 4,000 characters), which makes keyword placement in the description a meaningful ranking factor on Android. The second major difference is A/B testing: Google Play Console supports native creative experiments where you can test different icons, screenshots, and feature graphics against each other with statistical confidence. The iOS App Store does not offer native A/B testing for creative assets.
A one-time ASO audit covering keyword research, metadata recommendations, screenshot and creative recommendations, and a rating acquisition strategy costs $500 to $2,000 from an Indian agency and $2,000 to $6,000 from a US or UK agency. A monthly ASO retainer covering ongoing keyword tracking, metadata iteration, creative testing, and review management costs $500 to $1,500 per month from an Indian agency and $2,000 to $8,000 per month from a US or UK agency. Screenshot design and production costs $300 to $800 per set (iOS and Android combined) at Indian rates. At CV Infotech's $30 per hour rate, a monthly ASO retainer covers approximately 30 to 50 hours of active optimisation work.
On iOS, the highest-weight factors in order are: app name (the first field in App Store Connect, not the display name shown on the home screen), subtitle, and keyword field. After metadata: download velocity relative to competitors in the category, ratings and reviews volume and average, and crash rate. On Android, the highest-weight factors are: app title, short description, long description (keyword placement in the first 80 characters and across the full 4,000 characters), ratings and reviews, and download velocity. Both stores use engagement signals such as session length, retention rate, and uninstall rate as secondary ranking factors, though the weight of these signals relative to metadata is not publicly documented by Apple or Google.
No. The iOS App Store does not index the app description for search. Keywords placed in the description have no effect on search ranking in the App Store. The description is shown to users on the app's product page and influences the decision to download (conversion), but not the decision to show the app in search results (ranking). This is one of the most commonly misunderstood differences between iOS and Android ASO. On Google Play, the full description is indexed and keyword placement throughout the 4,000 characters does affect ranking. Treating the iOS description as a ranking tool is wasted effort; treating the Android description as a ranking tool is necessary.
The most effective method for improving ratings is implementing the native review prompt at the correct moment. On iOS, the SKStoreReviewRequest API triggers the native system prompt. The optimal timing is after a user has completed a meaningful in-app action that indicates satisfaction: after a successful purchase, after completing a milestone, or after a session that meets a minimum engagement threshold. Prompting immediately on launch or after a negative event consistently produces lower average ratings. On Android, the In-App Review API works similarly. Do not use third-party review prompt libraries that intercept the user before showing the system prompt, as both Apple and Google prohibit directing only satisfied users to rate the app.
AppTweak, Sensor Tower, and AppFollow are the three most widely used professional ASO tools in 2026, each with different strengths. AppTweak is strong for keyword research and competitor analysis across both stores. Sensor Tower provides the most comprehensive market intelligence including estimated download volumes and revenue estimates. AppFollow specialises in review management and rating analysis across multiple apps and geographies. All three charge subscription fees that are most cost-effective at agency scale. For individual apps on tighter budgets, Google Play Console's built-in keyword and acquisition reporting, combined with Apple's App Analytics in App Store Connect, provides the core data needed for basic ASO without third-party tool cost.
You can do basic ASO yourself with the tools available in App Store Connect and Google Play Console, particularly for metadata optimisation and rating prompt implementation. Where an agency adds the most value is in competitive keyword research using paid tools, creative testing using Google Play's experimentation features, localisation into multiple markets, and sustained iteration over months rather than a one-time setup. For an app with a limited budget, a one-time ASO audit from an agency to get the initial metadata and creative strategy right, followed by self-managed ongoing optimisation, is often the most cost-effective approach.
Paid user acquisition affects ASO in two ways. First, paid installs increase download velocity, which is a positive ranking signal. Running a paid UA campaign around an app update or launch creates a download spike that can improve organic ranking for target keywords. Second, paid UA installs must produce retained users to maintain the ranking benefit: if paid users uninstall the app immediately, the engagement signals (session length, retention rate, uninstall rate) can negatively affect organic ranking. The relationship between paid UA and ASO is not one-directional. A well-run paid UA campaign supports organic ranking. A poorly targeted paid UA campaign with low retention can depress it.
Yes. CV Infotech provides ASO services covering keyword research for both iOS and Android, metadata optimisation, screenshot and creative design, rating acquisition strategy, and review management. We also build the apps we optimise, which means the technical ASO elements — deep linking, rating prompt implementation, crash rate monitoring, and app size optimisation — are handled by the development team rather than outsourced. Our rate is $30 per hour. Contact us at business@cvinfotech.com or through our AI SEO agency page to discuss your app's current organic performance and what an ASO programme would look like for your category.
Akash Singh
·View full profileCTO and Co-Founder, CV Infotech · Gurugram, India
Akash has been building software for clients in the USA, UK, Australia, and Canada since 2012. He leads a 100% in-house team and personally manages every client relationship and technical decision. Francisco Escobar has worked with him since 2012. Steven has trusted the team with his AI platforms since 2019. 512 verified 5.0 reviews on Freelancer.com.
iOS + Android ASO · Built and Optimised by the Same Team · $30/hr
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