Download of GoodNotes 6.3.22 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. GoodNotes for Mac is categorized as Productivity Tools. The actual developer of this Mac application is Time Base Technology Limited.
From the developer:
GoodNotes is a companion application for existing GoodNotes iOS users. The program lets you view and manage your handwritten notes and documents in GoodNotes’ iCloud library. The program automatically saves versions of documents as you work on them. In addition, you can browse through document versions and restore pages from old versions.
You may want to check out more Mac applications, such as Scrivener, Bean or Readiris, which might be related to GoodNotes.