When you sign up for an APE Mobile trial via BIM 360, you'll be asked to select a project you'd like to import and the BIM 360 Project Files Subfolder where you would like the uploaded APE Mobile PDFs to appear.
What does this do?
If you select a BIM 360 project, then a corresponding project will be created for you automatically in APE Mobile, which will be linked to the BIM 360 project.
This means that selected forms and actions created in the APE Mobile project will be uploaded to the BIM 360 project (in PDF form) - so that you always have easy access to the forms being created on site, whether you're using BIM 360 or APE Mobile.
You can link additional projects once the trial is set up.