I am reading the manual for Omniplan iOS and see that you can import other .oplx files or upgrade to pro to import a MS Project file but is there any other way to import a task list?
My workflow for creating a Project is to first create a task list and organise into indented groups, tasks and milestones - because I make mistakes and because I organise better this way. After I have the task list then I create the rest of the task attributes - resources, durations, dependencies etc.
Note I have only procured the iOS version for working with the iPad Pro. Probably end up getting the Mac version in time.