I can't open the zip file in Goodnotes or similar apps
Follow the instructions here: https://bosspersonalplanner.com/support
It will walk you through how to open and import the planner. Most other apps work in a similar way. You can unzip the file in "Files" on iOS and then open them in the app you want. Or you can go into the app you use and usually import the planner in from an import option.