App Store Optimization (ASO) in 2026: The Only Checklist You Need

If you spend $50,000 building an app and then upload it to the App Store with a generic name, a 3-sentence description, and a screenshot of your login screen, you will get roughly 30 downloads. Total.

App Store Optimization (ASO) is the single highest-ROI activity in mobile — and 80% of founders skip it. Here is the complete 2026 checklist.

The 5-field ranking formula

Apple ranks apps on five weighted inputs:

1. App name (highest weight — up to 30 chars)
2. Subtitle (30 chars, second-highest weight)
3. Keyword field (100 chars, hidden from users, keyword-only)
4. Ratings & reviews (volume + recency)
5. Install & retention velocity (how fast people download and keep using it)

Name + subtitle — the 60 most important characters

Your app name must contain your primary keyword, not just your brand. Look at Calm ("Calm — Meditation & Sleep") or Notion ("Notion - notes, docs, tasks"). They sacrificed elegance for discoverability, and they were right.

Subtitle should contain your second and third keywords. Never duplicate words between name, subtitle, and keyword field — Apple deduplicates.

The keyword field hack most people miss

• No spaces after commas — you waste characters
• No plurals — Apple matches plurals automatically
• No brand names of competitors — it is against ToS and will get you flagged
• Use long-tail keywords — "ios budget tracker" beats "finance" every time

Screenshots: the 3-second test

Users swipe past your first screenshot in under 2 seconds. Your first 3 screenshots together must answer: "What does this app do, and why do I want it?" Use bold text overlays on top of real UI. No pure-UI screenshots.

Reviews — the multiplier

Apps with 4.5+ stars convert 2.2x more browsers into installs than apps with 4.0 stars. Prompt for reviews in-app, but only after a positive moment (e.g. user just completed a workout, hit a streak, finished a purchase). Never prompt on app launch.

Localization — the cheat code

Adding just 5 localizations (Spanish, French, German, Portuguese, Japanese) typically increases worldwide downloads by 30–80% because each new locale opens up a parallel ranking lane. Cost with modern LLM translation: under CAD $200 one-time.

The 2026 ASO checklist (copy this)

• [ ] Primary keyword in app name
• [ ] Secondary keyword in subtitle
• [ ] 100-char keyword field fully used, no spaces after commas
• [ ] 6–10 screenshots with text overlays, first 3 tell the full story
• [ ] App preview video (3x install lift on average)
• [ ] 4.5+ star rating strategy — in-app prompt after positive moment
• [ ] 5+ localizations
• [ ] Category chosen for LOWEST competition, not biggest audience
• [ ] Weekly check of Apple Search Ads impression data (free, even without running ads)

We do ASO for our clients

Every app we ship at Black Layers includes 30 days of post-launch ASO iteration — keyword updates, screenshot A/B, category testing. It is included free in our fixed-price projects.

Get a quote for your iOS app + ASO →