MetaSync is a macOS workspace that automates App Store Optimization (ASO) chores for indie iOS/macOS developers. It connects to App Store Connect via API key, pulls live metadata and screenshots, auto-translates titles, subtitles, keywords, descriptions and screenshot captions into 40+ locales, and then pushes everything back with per-field diffs and selective uploads.

For engineers, it also parses Xcode projects and manages Localizable.strings across 1,000+ locales — finding strings in code, adding entries, and replacing hard-coded text with String(localized:). Keys stay local, ES256 signing runs on-device, and folder structure is Fastlane-compatible and Git-friendly. Paid Mac app aimed at solo devs and small teams shipping to iPhone, iPad, Mac, Watch and Apple TV.