To-Do List Apps
To-do list apps for Outlook
9 of the 124 to-do list apps in this directory name Outlook as an integration.
A listing names at most eight integrations, so this is what each tool chose to show rather than everything it connects to. 8 of them are free or have a free plan.
Listings checked up to Oct 9, 2026 · Where the facts come from
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| Microsoft To DoFree to-do list from Microsoft that syncs with Outlook tasks | Free | Free | Web, macOS, Windows, iOS, Android |
| Remember The MilkLong-running to-do app with one-line task entry and saved searches | Free plan · from $49.99/yr | Yes | Web, macOS, Windows, Linux, iOS, Android |
| Tasks.orgOpen-source Android to-do list with CalDAV and Google Tasks sync | Free plan · from $0.99/yr | Yes | macOS, Windows, Linux, Android |
| Priority MatrixEisenhower-matrix task and project manager for teams | Free plan · from $12/mo | Yes | Web, macOS, Windows, iOS, Android, Browser extension |
| ToDoListFree, open-source task outliner for Windows with Gantt and kanban | Free | Free | Windows |
| Swift To-Do ListWindows task and notes organizer with a tree of lists | Free trial · from $99/yr | Trial only | Web, Windows, iOS, Android |
| tududiOpen-source task and life organizer to self-host or use hosted | Free plan · from €5/mo | Yes | Web |
| EisenhowerEisenhower Matrix to-do app for the web and iPhone | Free plan · from $2.99 one-time | Yes | Web, iOS |
| OneTaskFree task app that syncs Google, Outlook and CalDAV task lists | Free | Free | macOS, Windows, iOS, Android |
Common questions
Which to-do list apps work with Outlook?
9 of the 124 to-do list apps in this directory name Outlook as an integration. They are Microsoft To Do, Remember The Milk, Tasks.org, Priority Matrix, ToDoList, Swift To-Do List, tududi, Eisenhower and OneTask.
Are these the only to-do list apps that work with Outlook?
Probably not. A listing names at most eight integrations, so a tool that connects to Outlook may still not say so among the eight it chose. 115 of the 124 to-do list apps here do not name it; that is a "does not say", not a "cannot". Check the vendor's own integrations page before you rule one out.
Which of these to-do list apps are free?
Microsoft To Do, Remember The Milk, Tasks.org, Priority Matrix, ToDoList, tududi, Eisenhower and OneTask are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 4, 2026 to Oct 9, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and each listing names the pages it was read from.