ASO for Builders

ASO (App Store Optimization) and SEO both aim to improve visibility in search results, but the platforms and levers are different. Web SEO involves thousands of ranking signals across billions of pages. ASO involves a smaller set of signals — app name, keywords, ratings count, download velocity, engagement metrics — applied to two storefronts: the App Store and Google Play. The keyword field in iOS (100 characters, comma-separated, not visible to users) has no web SEO equivalent. ASO conversion rate (screenshots, icon, description convincing a store visitor to download) is a more direct lever in ASO than in web SEO. Both disciplines reward keyword research and consistent optimisation, but ASO cycles are faster.

App Store keyword research starts with identifying the core queries your target users type when looking for an app like yours. Tools like AppFollow, Sensor Tower, AppTweak, and MobileAction show keyword search volume and difficulty within the stores — these are distinct from web search volumes. Start with broad category terms, then look at what keywords your top competitors are ranking for. The iOS keyword field allows 100 characters (use every one, no spaces, no repeat words from your title). Android relies on natural keyword density across your description rather than a dedicated field. Prioritise medium-difficulty keywords where you have a realistic chance of ranking top 10.

Ratings and review count are significant ranking signals in both stores. Apps with higher average ratings and more reviews rank higher for competitive keywords, all else equal. More importantly, ratings are the primary conversion signal for users deciding whether to download — a 4.7-star app converts dramatically better than a 3.9-star app at the same price point. The most effective way to increase ratings is to prompt users at the right moment: after completing a task, after a positive interaction, or after reaching a milestone. Both stores require using the native SKStoreReviewRequest API rather than redirecting to the store page — in-app native prompts convert 3-5x better.

Screenshots are the single highest-impact conversion lever in your store listing — they are the first visual element users see before deciding to read your description or download. The first two screenshots are visible without tapping to expand, so they carry most of the conversion weight. Effective screenshots show the core value proposition in the first frame (not a feature list), use minimal readable text (tested to be legible at thumbnail size), and have a visual narrative — each screenshot shows the next step of the user journey. A/B test screenshots using iOS Product Page Optimization or third-party tools. Even small improvements (5-10% higher conversion) compound into significant download increases at scale.

ASO results move on different timescales depending on what you changed. Keyword metadata updates (iOS keyword field, Android description) are re-indexed by the stores within 1-3 days of publishing an update. Ranking improvements for competitive keywords take 2-6 weeks as the stores measure download velocity and engagement on the new terms. Screenshot changes affect conversion rate immediately — you will see the impact in your download-to-impressions ratio within days. Ratings accumulate over time; a review generation campaign shows results over 2-4 weeks. Plan for a 30-60 day optimisation cycle where you change one or two variables, measure the results, and iterate.