Compress PDF is a utility app designed for iPhone and iPad users seeking to reduce the size of their PDF documents quickly and efficiently. Users can easily select PDFs from their device or cloud storage services such as Gmail, Google Drive, Dropbox, Box, and OneDrive. The app promises fast compression times, typically completing the task within seconds while maintaining the quality of the original document.

The app operates by utilizing powerful servers to handle the compression process, ensuring that the device's battery and processing resources are preserved. Once the compression is complete, users can download the compressed file directly into the app. Additionally, the app prioritizes user privacy by deleting the files from the servers after processing, making it a reliable choice for managing PDF file sizes.