With a single Office app, or separate apps for Word, Excel, PowerPoint, and OneNote.
TL;DR: SwiftScan VIP lets you scan any document with your phone, and it’s only $41.99 for a lifetime subscription. If you don’t have a desktop scanner, making a digital copy of a physical document is ...
You can organize apps on your iPhone by moving them around, putting them into folders, and sending them to the App Library.