Free Tools for App Store Localization
Quick utilities we built because we needed them ourselves. No email gate, no tracking, just tools.
Text Expansion Calculator
Estimate how much your screenshot text will grow in 40+ languages. Plan layouts before you localize.
App Store Locale Code Lookup
Find the exact locale code for App Store Connect, Google Play, iOS .lproj, and Android values-* folders.
RTL Screenshot Preview
Upload a screenshot and see how it will look mirrored for Arabic, Hebrew, Persian, and Urdu.
App Store Localization Checker
Check whether your app name or subtitle still fits after translation. Expansion, width, RTL, and font notes for 41 App Store languages.
App Store Screenshot Sizes
Every required screenshot dimension for iPhone, iPad, Android, and the Play Store, with the display sizes Apple actually accepts.
App Icon Sizes
iOS, Android, macOS, and watchOS icon sizes in one chart, including adaptive-icon safe zones and the exact export size for every slot.
App Store Character Limits
Name, subtitle, keywords, promo text, and description limits for App Store Connect and Google Play, with what counts toward each.
App Store Rejection Codes
App Review guideline codes mapped to what actually triggers them and what a passing resubmission looks like.
Screenshot Aspect Ratios
Aspect ratios for every App Store and Play Store screenshot slot, and which source sizes crop cleanly into them.
Device Resolution Lookup
Point resolution, pixel resolution, and scale factor for current iPhone, iPad, and flagship Android devices.
A/B Test Sample Size Calculator
How many product page visitors you need before an App Store or Google Play screenshot test result is trustworthy, not noise.
App Preview Video Specs
Every App Store App Preview video resolution by device (iPhone, iPad, Mac, Apple TV, Vision Pro), plus the Google Play feature graphic and promo video specs.
Where to Submit Your App
43 app and SaaS directories, each one submitted to and then checked by reading the rel on a live listing. Four gave a free dofollow. Measured, not copied from another list.
App Store Keyword Field Counter
Paste your 100-character Keywords field and see the live count, plus duplicate, plural, and name/subtitle-overlap terms flagged as you type.
App Store & Google Play Categories
Every App Store category with its genre ID and every Google Play category with its slug, plus game subcategories and the closest match across stores.
App Store Storefronts
The largest App Store storefronts by region with ISO country codes, local currency, and the listing localization to ship first.