At least to developers because Microsoft has announced Microsoft To Do Graph APIs. By leveraging APIs, developers can bake To Do into their applications. Specifically, create apps that connect directly into the task management application. With Microsoft To Do Graph APIs, developers can create workflows from their applications to the To Do app. Furthermore, they can sync application tasks to To Do for a single view. The services also function in business applications.
“Create tasks from your app’s workflow, for example, from email or notifications, and save them in To Do. Use the linkedResource entity to store the link back to your app. Sync your app’s existing tasks with To Do and create a single task view for better prioritization and manageability. Manage To Do tasks in a custom business application.”
APIs
Currently there are three APIs available. With todoTaskList, developers can create tasks in apps, with todoTask they can represent an individual piece, and with linkedResource syncs any item from a linked application:
CRUD operation on todoTaskList entity /me/todo/lists CRUD operation on todoTask entity /me/todo/lists//tasks CRUD operation on linkedResource entity/me/todo/lists//tasks//linkedResources
Microsoft To-Do is available on Android from the Google Play Store here. To get Microsoft To-Do on iOS, head to the App Store here.