Short description and promotional text accurate and within limits

Apple's App Store metadata validation automatically rejects any subtitle exceeding 30 characters — this happens in seconds during upload, before a reviewer ever opens the app. A subtitle that repeats the app name wastes the 30-character conversion slot Apple gives you, and Apple's guidelines (Guideline 2.3.1) prohibit pricing information in subtitles. On Google Play, the 80-character short description is the primary text shown in search results; an inaccurate or over-limit short description reduces click-through rate and may trigger manual review for misleading content.

Check character counts against platform limits before every submission:

echo -n "$(cat fastlane/metadata/ios/en-US/subtitle.txt)" | wc -c
# Must be ≤30 for App Store subtitle
echo -n "$(cat fastlane/metadata/android/en-US/short_description.txt)" | wc -c
# Must be ≤80 for Google Play short description

Write the subtitle as a single value proposition — what the app does for the user, not what it is called. Avoid 'Free!', '$0.99', or any price reference in the subtitle. Store subtitle and short description files in fastlane/metadata/ version-controlled alongside app code.