Syncing Mac and iOS versions
Mac
To start working with project files on Mac make sure iCloud is enabled on Mac: go to System Preferences ▸ iCloud ▸ iCloud Drive ▸ Options... ▸ Documents ▸ enable Project Office option.
To share projects to your iOS device after finishing up with your project, choose "iCloud Drive" folder when saving a new project on your Mac.
Note: At simultaneous work on several devices, the program reports about changes and proposes to save one or more project files. You can save either one of selected files, or keep all at once.
iOS
To start working with project files on iOS device make sure Project Office app has an access to iCloud Drive Document Storage: go to Settings ▸ Project Office app ▸Document Storage ▸ enable iCloud Drive option.
You can open files saved in iCloud Drive in two ways: 1) from Files app on iOS device AND 2) from Project Office app. To open files from Files app on iOS device go to: Files app ▸ Browse ▸ iCloud Drive. Here you will find Project Office folder and all saved projects in it. Projects that are saved in iCloud Drive are available both on Mac and iPhone/iPad.
Note: At simultaneous work on several devices, the program reports about changes and proposes to save one or more project files. You can save either one of selected files, or keep all at once.