App Store Localization & Character Limit Previewer.
Apple allows developers to localize apps into 39 languages. In top markets like the US, UK, and Switzerland, Apple indexes multiple languages simultaneously—effectively doubling or quadrupling your ranking keyword capacity. Use this free planner to preview limits, prevent duplicate cannibalization, and format character-perfect metadata.
Select Target App Store Storefront
Choose a country to see Apple's official cross-indexing language rules and maximum character quota.
Editing: English (US) (en-US)
Primary language for all US storefront users.
locale used
FocusCalm: Daily Meditation
Sleep Stories & Anxiety Relief
Preview reflects how this specific locale appears to users browsing the United States App Store.
Cross-Locale Cannibalization Check
2 Locales AnalyzedNeed competitor keyword gaps for every country?
ASO Miner inspects top category competitors across 60+ storefronts, isolates high-volume keywords, and generates localized Title, Subtitle, and 100-character sets in 60 seconds.
Scan Competitor Gaps NowHow Apple Cross-Localization Works (And Why It Matters)
Most iOS indie developers assume that only English (US) matters for the United States storefront. In reality, Apple Search indexes both English (U.S.) and Spanish (Mexico) for every device located in the US. By deploying localized metadata for Spanish (Mexico), you gain an extra 30 characters in the Title, 30 characters in the Subtitle, and 100 characters in the Keyword Field—yielding 320 total ranking characters instead of just 160.
If the keyword “fitness” is already in your English (US) Title, do not put it in your Spanish (Mexico) keyword field. Apple merges both sets into a single unified indexing pool for US searchers. Repeating it wastes 7 valuable characters.
Apple can combine a word from your English (US) Title with a word from your Spanish (Mexico) Keyword field to rank for 2-word and 3-word long-tail queries. This allows you to rank for hundreds of low-competition search phrases.
Switzerland indexes German, French, Italian, and English (UK). The United Kingdom indexes English (UK), English (Australia), French, and Arabic. Developers who know these multi-locale combinations dominate tier-1 European rankings.
Frequently Asked Questions (FAQ)
What are the exact character limits in App Store Connect?
App Store Connect enforces strict limits: App Title is maximum 30 characters, Subtitle is maximum 30 characters, Promotional Text is 170 characters, Description is 4,000 characters, and the hidden Keyword Field is maximum 100 characters.
Does Google Play have the same localization rules?
No. Google Play does not use a hidden 100-character keyword field. Instead, Google Play uses an 80-character Short Description and an algorithmic natural-language indexer over your 4,000-character Long Description. Use our Google Play Density Checker to optimize for Google Play.
Can I use English words in my Spanish (Mexico) keyword field for the US?
Yes! Apple does not validate the linguistic language of the words inside your keyword field. Many top iOS developers place secondary high-volume English keywords directly into the Spanish (Mexico) keyword field to rank for more English searches in the United States.