App Store limits: app name 30 characters, subtitle 30, keywords 100, promotional text 170, description 4,000 and What's New 4,000. Google Play limits: app name 30, short description 80, full description 4,000 and release notes 500 per language. Every figure below comes from Apple's and Google's own help pages, linked at the end.

App Store character limits

Field Limit Where it appears Indexed for search

App name 30 characters (min. 2) Product page, search results Yes

Subtitle 30 characters Under the name, search results Yes

Keywords 100 characters Nowhere — hidden Yes

Promotional text 170 characters Above the description Not listed by Apple

Description 4,000 characters Product page Not listed by Apple

What's New 4,000 characters Version update information Not listed by Apple

App Review notes 4,000 bytes Only App Review No

The "indexed" column follows Apple's own search page, which names the title, subtitle, keywords and primary category as text relevance.…