Notion Apps are custom-built applications that run within the Notion workspace. Notion is a productivity tool that provides a flexible and customizable platform for organizing and managing information. With Notion, you can create databases, notes, to-do lists, wikis, and more, all within a single workspace.

Also, these third-party integrations allow you to extend the functionality of Notion beyond its core features. These apps are built using the Notion API, which provides developers with access to Notion's data and functionality.

Notion Apps can be used to perform a wide range of tasks, such as project management, time tracking, note-taking, and more. Some popular Notion Apps include Trello, Slack, and Google Drive, which allow you to integrate these services into your Notion workspace.

These apps can be installed from the Notion App Gallery, which is a marketplace of pre-built apps created by third-party developers. You can also create your own Notion Apps using the Notion API if you have the necessary programming skills.