ASC Metadata Sync

Use this skill to keep local metadata in sync with App Store Connect.

Two Types of Localizations

1. Version Localizations (per-release)

Fields: description, keywords, whatsNew, supportUrl, marketingUrl, promotionalText

bash

# List version localizations
asc localizations list --version "VERSION_ID"

# Download
asc localizations download --version "VERSION_ID" --path "./localizations"

# Upload from .strings files
asc localizations upload --version "VERSION_ID" --path "./localizations"

2. App Info Localizations (app-level)

Fields: name, subtitle, privacyPolicyUrl, privacyChoicesUrl, privacyPolicyText

bash

# First, find the app info ID
asc app-infos list --app "APP_ID"

# List app info localizations
asc localizations list --app "APP_ID" --type app-info --app-info "APP_INFO_ID"

# Upload app info localizations
asc localizations upload --app "APP_ID" --type app-info --app-info "APP_INFO_ID" --path "./app-info-localizations"

Note: If you get "multiple app infos found", you must specify --app-info with the correct ID.

Fastlane Format Workflow

Export current state

bash

asc migrate export --app "APP_ID" --output "./metadata"

Validate local files

bash

asc migrate validate --fastlane-dir "./metadata"

This checks character limits and required fields.

Import updates

bash

asc migrate import --app "APP_ID" --fastlane-dir "./metadata"

Quick Field Updates

Version-specific fields

bash

# What's New
asc app-info set --app "APP_ID" --locale "en-US" --whats-new "Bug fixes and improvements"

# Description
asc app-info set --app "APP_ID" --locale "en-US" --description "Your app description here"

# Keywords
asc app-info set --app "APP_ID" --locale "en-US" --keywords "keyword1,keyword2,keyword3"

# Support URL
asc app-info set --app "APP_ID" --locale "en-US" --support-url "https://support.example.com"

Version metadata

bash

# Copyright
asc versions update --version-id "VERSION_ID" --copyright "2026 Your Company"

# Release type
asc versions update --version-id "VERSION_ID" --release-type AFTER_APPROVAL

TestFlight notes

bash

asc build-localizations create --build "BUILD_ID" --locale "en-US" --whats-new "TestFlight notes here"

.strings File Format

For bulk updates, use .strings files:

code

// en-US.strings
"description" = "Your app description";
"keywords" = "keyword1,keyword2,keyword3";
"whatsNew" = "What's new in this version";
"supportUrl" = "https://support.example.com";

For app-info type:

code

// en-US.strings (app-info type)
"privacyPolicyUrl" = "https://example.com/privacy";
"name" = "Your App Name";
"subtitle" = "Your subtitle";

Multi-Language Workflow

•Export all localizations:

bash

asc localizations download --version "VERSION_ID" --path "./localizations"

•
Translate the .strings files (or use translation service)
•
Upload all at once:

bash

asc localizations upload --version "VERSION_ID" --path "./localizations"

•Verify:

bash

asc localizations list --version "VERSION_ID" --output table

Character Limits

Field	Limit
Name	30
Subtitle	30
Keywords	100 (comma-separated)
Description	4000
What's New	4000
Promotional Text	170

Use asc migrate validate to check limits before upload.

Notes

•Version localizations and app info localizations are different; use the right command and --type flag.
•asc migrate validate enforces character limits before upload.
•Use asc localizations list to confirm available locales and IDs.
•Privacy Policy URL is in app info localizations, not version localizations.