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App Store Optimization Basics
Quick answer
App store optimization means writing a listing that the right people can find and understand in seconds. On Apple, use the 30-character name and subtitle and the hidden 100-character keyword field well. On Google Play, use the 30-character title and 80-character short description. Lead the screenshots with the main benefit, and earn steady ratings.
Many people find apps by searching the App Store or Google Play, then decide in seconds from the name, icon, screenshots and ratings. App store optimization means making those details clear and findable. It isn't a trick; it's writing a listing that tells the right people what your app does, within each store's limits.
Key Takeaways
- People find apps by searching stores, then decide in seconds.
- Apple allows 30 characters for the app name and 30 for the subtitle.
- Apple's keyword field holds 100 characters and isn't shown to users.
- Google Play allows a 30-character title and an 80-character short description.
- The first screenshots should show the app's main benefit.
- Steady ratings and fast fixes after bad releases protect visibility.
Published: November 1, 2026 | Reading Time: ~8 minutes | Category: iPhone App Development
This guide covers app store optimization basics: the app name, subtitle, keywords, descriptions, screenshots and previews, the icon, ratings and reviews, Google Play differences, languages, testing listings and what to measure. Put plainly: say what the app does in the name and subtitle, show it in the first screenshots and earn steady ratings.
In This Playbook
- How long can an App Store app name be?
- The subtitle
- How does Apple's keyword field work?
- Descriptions
- Screenshots and previews
- The icon
- Ratings and reviews
- Google Play differences
- Languages
- Testing listings
- After the download
- What to measure
- The first three months
How long can an App Store app name be?
Up to 30 characters on Apple. Your brand plus what it does, if it fits.
Clear, not stuffed. Readable for people first.
The subtitle
Up to 30 characters on Apple. A short benefit line.
Search words that fit naturally. "Book classes and track visits."
How does Apple's keyword field work?
Apple's keyword field. Up to 100 characters, hidden from users.
Words people search. Not your internal names.
No repeats. Words in the name don't need repeating here.
Descriptions
The first lines matter most. Many people never expand them.
Plain benefits. What people can do with the app.
Promotional text on Apple. A short message you can change without a new release.
Screenshots and previews
First screenshots show the main benefit. Not a login screen.
Short captions. One idea per screenshot.
A short preview video. Optional, showing the app in use.
Matching the brand, as covered in one brand, two surfaces.
The icon
Simple and recognizable. Clear at small sizes.
Consistent with the brand. Colors and shapes people know.
Ratings and reviews
Ask at a good moment. After a success, not a problem.
Apple limits prompts. The system rating prompt appears only a few times a year per user.
Reply to reviews. Especially negative ones.
Recover from bad releases, as covered in ratings recovery.
Google Play differences
A 30-character title. And an 80-character short description.
A full description up to 4,000 characters. Searchable, so write it for people and search.
Quality signals matter. Crashes and freezes can affect visibility, as covered in performance tuning.
Policies are covered in Google Play review and policy basics.
Languages
Localized listings. Names, descriptions and screenshots in each language, as covered in bilingual mobile apps.
Testing listings
Apple custom product pages. Different screenshots for different audiences or ads.
Google Play experiments. Test icons, screenshots and text.
One change at a time. So results are clear.
After the download
A strong first experience. As covered in app onboarding.
What to measure
Search impressions. How often the listing appears.
Listing conversion. Views that become downloads.
Ratings. Average and count.
Search rankings. For key words.
Retention. As tracked in iPhone app analytics.
The first three months
Month one: rewrite
Rewrite the name, subtitle, keywords and first lines of the description within each store's limits.
Month two: show
Redesign the first screenshots around the main benefit, localize listings and ask for ratings at good moments.
Month three: test
Test screenshots and text one change at a time, and track listing conversion and ratings.
How Astra improves app listings
Astra Results Marketing improves app store listings. We write clear names, subtitles and keywords within each store's limits, design screenshots around the main benefit, localize listings and test changes.
Engagements begin with an app review through our iPhone app development team.
Related reading
Frequently asked questions
What is app store optimization?
Making an app's store listing clear and findable, so the right people find it and decide to download.
How long can the app name and subtitle be on Apple?
Up to 30 characters each, plus a hidden keyword field of up to 100 characters.
What are Google Play's limits?
A 30-character title, an 80-character short description and a full description up to 4,000 characters.
What should the first screenshots show?
The app's main benefit, not a login or splash screen.
How do we get more ratings?
Ask at a good moment, after a success, and reply to reviews, especially negative ones.
What should we measure?
Search impressions, listing conversion, ratings, keyword rankings and retention.
Ready for an app listing that gets found and downloaded? Astra Results Marketing writes clear listings within each store's limits, designs benefit-first screenshots and tests what works. ▸ CALL (786) 321-2866 · ▸ REQUEST YOUR CONSULTATION
