ASO: How to Rank in the App Stores

App store optimization costs $500–3,000/month as a service and typically lifts organic installs 2–4x within two to three months — with roughly 65% of all app installs coming from store search, not browsing or ads. ASO is SEO for the only marketplaces that matter on mobile, and most apps have never done it seriously.

How store algorithms actually rank

Both Apple and Google rank on two families of signals: relevance (does the listing match the query — title, subtitle, keyword field, category) and appeal (do people who see it install it — conversion rate, retention, ratings velocity, uninstall behaviour). The loop compounds: better keywords bring more impressions, better creatives convert them, better engagement proves quality, and the app ranks higher. Every element below feeds that loop.

Keyword optimisation: where the words go

• Title (30 characters, iOS): the strongest ranking field — the core keyword belongs here naturally, brand plus function
• Subtitle / short description: the second keyword slot — benefit-led, keyword-bearing
• Keyword field (iOS, 100 characters): comma-separated, no spaces needed, no duplicates of title words — hidden inventory that many apps leave half-empty
• Description (Google Play): genuinely indexed, unlike iOS — primary keyword in the first lines, naturally repeated
• Category choice: ranking difficulty varies by category; sometimes the adjacent category is the winnable one

The discipline mirrors SEO: target one primary keyword per page, watch the impressions it earns, and iterate monthly. Tools like AppFollow, Sensor Tower and AppTweak provide keyword volumes and competitor rankings — the data layer ASO lacked for years.

Creative optimisation: converting the impression

Ranking gets the impression; creatives get the install. In order of impact:

• Icon: the first test — A/B test it; icon changes have moved install rates 5–30%
• Screenshots (first three): most users never scroll past them — lead with the value, not the logo; caption every frame
• Preview video: the most underused asset — 15–30 seconds showing the core action, not a brand film
• Description first lines: what the skimmer reads while deciding

Store A/B testing is native in Google Play and available through Apple's product pages — run one variable at a time, and let experiments run to significance.

Ratings and review velocity

Rating averages gate conversion — below 4 stars, install rates fall off a cliff. The mechanics that work: prompt for a rating after a success moment (order completed, workout finished), never on open, never on error. Apple and Google both offer native in-app review prompts with rate limits — use them at the right moments and respond to every negative review with substance. Reviews are also indexed for search on both stores.

Localisation: the compounding multiplier

Localising listings — title, screenshots, keywords — for your top markets routinely lifts conversion 20–100% in those locales, because most competitors ship English-only. German, Japanese, Portuguese and Hindi app markets are dramatically less contested in store search. Localisation is the highest-leverage low-effort ASO work available.

The ASO workflow

• Audit: current keywords, rankings, conversion rates versus competitors in the category
• Keyword map: one primary plus secondary keywords per locale, chosen on volume-versus-difficulty
• Rewrite the listing: title, subtitle, keyword field, screenshots — one coherent narrative
• Test: creatives through store experiments; keywords through impression and ranking movement
• Review system: prompts at success moments, responses to feedback
• Iterate monthly: store algorithms and competitor moves shift constantly

What ASO costs

DIY with tools: $100–300/month in subscriptions plus your time. As a managed service: $500–3,000/month, with localisation projects priced at $300–1,000 per locale. Against paid installs at $1–5 each, ranking improvements compound free — which is why ASO is usually the cheapest install growth available. Our ASO services run the full workflow above.

One honest caveat

ASO cannot rescue an app people uninstall. Retention and rating mechanics feed the algorithms — a listing optimisation on a leaky product moves numbers briefly, then decays. The order of operations: make the app worth keeping, then make it findable — the same sequencing logic as how free apps make money: retention first, monetisation second. For what the app itself costs to build, the app development cost guide has the honest ranges.