When someone says they're "optimizing their app," they could mean a dozen different things. Optimizing the code so it loads faster. Optimizing the onboarding so more users complete setup. Optimizing the push notifications so fewer people turn them off.
All of those are valid. But the most impactful form of app optimization — and the one most indie developers never do — happens before anyone even downloads the app.
It happens in the App Store listing.
The Two Types of App Optimization
App optimization broadly splits into two categories:
1. In-app optimization — everything inside the product itself.
- Performance: load time, crash rate, battery usage
- UX: onboarding flow, navigation, feature discoverability
- Retention: push notifications, re-engagement, habit loops
- Monetization: paywall placement, pricing, trial length
2. Store optimization — everything that affects how your app is found and downloaded.
- Metadata: title, subtitle, keyword field, description
- Visuals: screenshots, preview video, app icon
- Social proof: ratings, reviews, review response strategy
- Localization: metadata in multiple languages for multiple markets
Most developers are familiar with the first category. It's the work that happens in Xcode. The second category — store optimization, formally called App Store Optimization or ASO — is where most indie apps have the largest untapped opportunity.
What Store Optimization Actually Involves
When you optimize your App Store listing, you're improving four things:
Discoverability — how often your app appears in search results. Apple's algorithm reads your title, subtitle, and keyword field to decide which searches your app is relevant for. If those fields aren't optimized with the right keywords, your app doesn't show up — regardless of how good it is.
Conversion — how often someone who sees your listing decides to download. This is driven by your screenshots, app icon, and the first two lines of your description (the text visible before the "more" button). A strong screenshot with a clear benefit statement can double conversion rates over a raw UI screenshot.
Ratings and reviews — how your social proof compares to competing apps. Apple's algorithm factors in review volume and recency. A newer app with 50 recent 4.8-star reviews often outranks an older app with 200 reviews that are two years old.
Localization — how visible your app is in non-English markets. This is the most overlooked lever in store optimization. If your metadata is only in English, you're effectively invisible to users searching the App Store in Japanese, German, French, or Portuguese. Markets like Japan and Germany have high purchase rates and significantly less competition than the US English store.
Why Most Indie Developers Only Do Half the Job
The in-app optimization work is visible. You can see it in your crash logs, your session data, your DAU numbers. When you improve onboarding, you can measure the result the next day.
Store optimization is less visible. You can't easily see that your app is ranking #140 for "habit tracker" in the US when it could rank #12 in the same category in Germany — because you've never looked at German keyword data.
This is why most indie apps are discovered primarily by users who already know the app name and search for it directly. Organic discovery — users finding the app through category browsing or keyword search — is minimal for apps that haven't invested in metadata optimization.
The opportunity gap between apps that have done proper ASO and apps that haven't is one of the largest in mobile software. An app that ranks well for 20 keywords in 5 countries gets orders of magnitude more organic downloads than an identical app with unoptimized metadata.
What Optimization Looks Like in Practice
A concrete example: a productivity app with the title "FocusFlow" and no subtitle.
After optimization:
- Title: "FocusFlow — Pomodoro Timer" (adds primary keyword in 30 characters)
- Subtitle: "Focus, work blocks & time track" (adds secondary keywords)
- Keyword field: all 100 characters used, no repeats from title/subtitle, targeted at specific search terms like "pomodoro technique" and "deep work timer"
- Screenshots: first screenshot shows "Build focus habits in 7 days" instead of raw UI
- Localization: metadata translated and keyword-researched for Japan, Germany, and France — three markets where productivity apps convert well and the competition is significantly lower than the US
The result after 3–4 weeks: rankings appear for keywords the app was previously invisible for. Organic downloads from non-English markets begin. Each market where you rank for relevant keywords compounds over time as behavioral signals (downloads, retention) reinforce your position.
The Part That Takes the Most Time
Keyword research for international markets is the most time-intensive part of store optimization. It requires pulling search volume data from ASO tools for each market separately, identifying which terms have real traffic, cross-referencing against what your competitors rank for, and writing metadata that fits within Apple's character limits (30 characters for title, 30 for subtitle, 100 for the keyword field).
For an indie developer doing this alone, proper research for a single market takes 4–6 hours. Across 5 markets, that's a full working week — before writing a single line of metadata.
That's the problem LocalizeRank solves. Market research, keyword gap analysis, and ready-to-paste metadata for your App Store listing across 5, 10, or 20 markets — delivered as a Google Sheet you paste directly into App Store Connect.