Why Metadata Is Your Most Valuable ASO Asset
App Store Optimization has many moving parts — screenshots, ratings, conversion rates, download velocity. But the metadata fields you control directly are your first and most impactful lever. Get them right, and your app surfaces for searches it never would have otherwise. Get them wrong, and no amount of marketing budget will compensate for invisibility.
The three fields that determine what searches your app appears for are: 1. App Name (30 characters) — the highest-weight field in Apple's algorithm 2. Subtitle (30 characters) — second in weight, often underutilized 3. Keywords (100 characters) — the least visible but critical for targeting long-tail searches
Together, these give you 160 characters of directly indexed metadata (plus the 100-character keyword field, which only Apple indexes). This guide explains how to use every one of them.
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The App Name: Your Most Powerful 30 Characters
Apple gives your app name the most algorithmic weight of any text field. A keyword in your title ranks significantly higher than the same keyword in your subtitle or keyword field.
The Formula That Works
The most effective app names follow a simple structure:
[Brand Name] — [Primary Keyword or Value Proposition]
Examples: - *Headspace: Meditation & Sleep* — brand + category keywords - *Photoroom - AI Photo Editor* — brand + primary function - *Fantastical - Calendar & Tasks* — brand + category description
The keyword after the dash or colon is doing ASO work. Without it, "Headspace" is just a word. With it, the app surfaces for meditation, sleep, and related searches.
What to Put After Your Brand Name
Choose the keyword or phrase that: 1. Has the highest search volume relevant to your app 2. Accurately describes your core function 3. Is not already your brand name (don't repeat words — Apple's algorithm doesn't reward repetition)
Use a tool like AppFollow, Sensor Tower, or AppTweak to estimate search volume for candidate keywords before committing.
Common Mistakes to Avoid
- Keyword stuffing the title: "Todo List - Task Manager, Planner, Reminder, Organizer" reads as spam and violates Apple's guidelines
- Using only your brand name: "Acme" tells Apple nothing about what your app does
- Putting your category name in the title: If your app is already in the Productivity category, you don't need to put "Productivity" in the title — it's redundant
- Ignoring competitor patterns: Search your main keyword and look at what successful apps put in their names. This isn't copying — it's understanding what the market responds to
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The Subtitle: 30 Free Characters of Keyword Real Estate
The subtitle appears just below your app name in search results. It carries strong algorithmic weight — second only to the app name — and most developers either leave it blank or fill it with marketing copy that does nothing for search.
Treat It as a Keyword Field
Your subtitle should contain keywords that complement (not repeat) your app name. If your title includes "Calendar," don't put "Calendar" in the subtitle too — you're wasting the slot.
Think of it this way: your title and subtitle together should cover different aspects of your app's functionality or audience.
Example — a habit tracking app: - Title: *HabitFlow — Daily Habit Tracker* - Subtitle: *Build routines, reach your goals*
The subtitle here is readable copy that also contains indexable terms ("routines," "goals") that the title didn't cover.
Readable vs Pure Keyword Strategy
There are two schools of thought:
Readable copy approach: Write a subtitle that sounds natural to a human reader, but naturally contains secondary keywords. Better for conversion — it reads well in search results. Best for established apps with good brand recognition.
Pure keyword approach: Pack in as many relevant search terms as possible, even if it reads awkwardly. Better for pure discovery. Often seen in competitive categories where visibility is paramount.
For most indie developers, the readable copy approach is better. You need search traffic *and* conversions. A subtitle that reads as spam may get impressions but hurt click-through.
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The Keyword Field: 100 Characters, Zero Spaces Wasted
The keyword field is invisible to users — it only Apple's search algorithm sees it. But it's the field you have the most flexibility with, and poor use of it is one of the most common ASO mistakes.
The Rules
- Separate keywords with commas, no spaces (spaces count against your limit)
- 100 characters total
- Apple indexes single keywords and combinations, so "task" and "manager" both index, plus "task manager"
- Do not repeat words already in your title, subtitle, or category name — Apple already indexes those, and duplication wastes space
- Do not use competitor app names — this violates Apple guidelines and can get your app removed
How to Build Your Keyword List
Step 1: Brainstorm List every way a user might describe your app's function, category, or use case. Think about: - What problem does your app solve? - What category does it fit into? - What are the alternatives users compare it to? - What are related activities, workflows, or outcomes?
Step 2: Filter for relevance and volume Use an ASO tool to estimate relative search volume for your candidate keywords. Prioritize terms with: - High enough volume to be worth targeting - Low enough competition to have a realistic chance of ranking
Step 3: Remove duplicates with your title/subtitle Strip any keywords already covered by your app name, subtitle, or App Store category.
Step 4: Pack efficiently Order matters slightly (earlier terms may carry marginally more weight), but character efficiency matters more. Choose shorter synonyms where possible. "photo" (5 chars) vs "photograph" (10 chars) — use "photo" and spend the saved characters on another keyword.
Keyword Field Example
For a meditation app with title "Calm Mind — Meditation Timer":
❌ Wasteful: `meditation,timer,calm,mindfulness,relax,meditation app,relax mind,mindful`
✓ Efficient: `mindfulness,sleep,anxiety,breathe,stress,focus,guided,relax,yoga,zen`
The ❌ version repeats "meditation" (already in the title) and wastes characters on "relax mind" as a phrase when "relax" is already included.
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Localization: Multiply Your Keyword Space
Here's the most underused tactic in App Store metadata optimization: every localization gets its own title, subtitle, and keyword field.
If you add a Spanish localization, you get an additional 100-character keyword field that's independent of your English one. Apple uses the localized metadata for users in Spanish-speaking regions, but there's evidence that localized keyword fields can influence rankings globally.
Even if your app isn't translated, creating a metadata-only localization for your key markets (UK English, Australian English, Canadian French, etc.) expands your effective keyword space significantly. You don't need a translated app — just translated metadata.
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Monitoring and Iterating
Metadata optimization isn't a one-time task. App Store trends shift, competitor strategies change, and new keywords emerge. Plan to review your metadata every 60-90 days.
What to look for: - Keyword rankings for your target terms (use AppFollow or Sensor Tower) - Impressions from App Store Search in App Analytics - Search terms report in App Store Connect (shows actual terms that led to impressions) - Conversion rate changes after metadata updates
A/B test your metadata changes with Apple's built-in Product Page Optimization tool, which lets you test different app names and subtitles directly in the App Store.
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A Note on Screenshots and Metadata Together
Metadata gets users to your app page. Screenshots convert them into downloads. When you optimize both together, you create a compounding effect: better ranking + better conversion = dramatically more downloads.
If your title targets "habit tracker," your first screenshot should visually confirm that within seconds. Tools like AppFrame make it easy to create professional app showcase images that reinforce your metadata's positioning and convert curious searchers into actual users.
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The Compounding Returns of Good Metadata
Getting your metadata right doesn't just improve search rankings in isolation. Higher rankings lead to more organic downloads. More downloads improve your download velocity. Higher velocity further improves your ranking. Better rankings lead to App Store editorial visibility.
The flywheel starts with those 160 characters. Invest the time to get them right — and revisit them regularly as your understanding of your audience deepens.