The new release of Task Office 3.3 and Project Office 2.5 for iOS with support of iOS 12 and Siri Shortcuts are already available in the App Store.
Task Office (3.3) and Siri Shortcuts
Since version 3.3 Task Office allows you to add Siri Shortcuts for creating new items: tasks, projects, contacts and companies.
Project (2.5) Office and Siri Shortcuts
Since version 2.5 Project Office allows you to add Siri Shortcuts for opening documents (projects).