react-native-blob-courier

Provides configurable HTTP methods, headers, and MIME types for downloading and uploading files, with built-in support for progress tracking via onProgress callbacks.

Leverages Android's built-in download manager for managed background downloads, as shown in the example with useDownloadManager: true, enabling notifications and system-level handling.

Supports multipart uploads with mixed data types (strings and files) and preserves part order, though it requires using Symbol.for for key ordering to avoid JavaScript quirks.

Offers a fluent interface that improves readability and safety, along with a TypeScript-based API for robust development, as emphasized in the library's philosophy.