Retrieve App Store reviews
/appstore/reviewsReturns one page of customer reviews for an App Store app, identified by `id` (numeric track ID) or `app_id` (bundle ID). `page` runs 1 to 10 and `sort` is `mostRecent` (default) or `mostHelpful`. Reviews carry `score`, `title`, `text`, `version`, `user_name` and `updated`. Returns 503 when reviews cannot be retrieved, and 404 when the app is not in that `country` storefront.