By making purchases in the application's settings, you can now have:
1. No Adverts: distraction-free usage.
2. Pro Features:
Unrestricted Disk Storage: limited only by capacity of your device.
Local Passcode Lock: secure local access to your documents.
Quick Scroll Bars: quickly jump to a file or page number with Files' quick scroll bars.
PDF Search and Thumbnails: search PDF contents and browse page thumbnails.
Image browsing, slideshow and thumbnails: quickly browse images from the viewer, or sit back and enjoy a slideshow, with various transition options. Files will also generate image thumbnails in the file viewer.
File-management: move, copy and rename files, including support for zip files.
Global File Name Search: quickly filter files and folders using the handy search tool.
Downloads: download from the internet using Files Pro' built-in web browser. Easily download documents, email attachments or access your cloud storage.
Email: send documents as email attachments directly from Files.
Bookmarks: add bookmarks to documents for quick access to frequently viewed sections.
Go to Page: quickly jump to any page in a document.
Import and Export Images: import photos or video from your Photo library, or export images back to the Camera Roll.
Audio Playlists: automatically play back an entire folder of audio files as a playlist, or move manually between tracks.
Printing: print documents via Apple's Air Print technology.