If you are a MemberPlus subscriber, you can create custom folders in two ways:
Option 1: Via the Saved tab
Open the Insight Timer app.
Tap the Saved tab (fifth icon at the bottom of the screen).
Tap + New Folder.
Enter a folder name, then tap Save.
Tap the + icon in the top-right corner to add Tracks, Courses, or Playlists.
Tap the + beside the content you want to add.
Tap Done.
Option 2: Via the Play Screen
Play any meditation.
On the Play screen, tap More (⋯) or the Bookmark (ribbon icon).
Tap Add to Folder.
Select an existing Folder, or tap + New Folder to create one.
If creating a new folder, enter a name and tap Save.
Tap Done to confirm.