To install Project Viewer 365 on your iPhone you need to use an Apple ID to purchase iProject Viewer app and download it. If you don’t have an Apple ID, you can create one in App Store.After downloading, iProject Viewer is automatically installed in the /Applications folder, and the application icon appear in Launchpad.​Besides the iProject Viewer app, you can additionally buy the MPP+ in-app purchase that brings you enhanced functionality.​