GoodNotes is a note-taking and annotation app that is designed for use on iOS and iPadOS devices. It allows users to create notes using a variety of input methods, including typing, handwriting, and drawing, as well as to import and annotate PDF documents. GoodNotes includes features for organization and sharing, such as the ability to create and organize notes within notebooks, as well as the ability to share notes via email, AirDrop, and other services. It also offers integration with other apps and services, such as Google Drive and Dropbox. GoodNotes is known for its intuitive interface and powerful annotation tools, making it a popular choice for students, professionals, and other users who need a flexible and feature-rich note-taking app.