What the app purchase covers
Shadowrocket is a closed-source commercial app sold as a one-time purchase, with no monthly app fee. Before paying, check the price and currency shown in your storefront and on the system confirmation screen. Prices in other storefronts may differ from your bill. The purchase page shows the current price.
App updates after purchase are delivered through the App Store. Check the Updates section of your store account, or use automatic updates if enabled in your device settings. Review the current App Store listing to see what’s changed and whether an update is needed or your system meets the requirements.