Todoist
Todoist is a server integration. On Basic, you can connect one of Notion, Todoist, or Microsoft To Do at a time. Once one is connected, the other two show a PRO badge. The counter at the bottom of Settings > Integrations shows how many you use, for example "0 of 1 server integrations". Pro and Ultra have no limit. On Free, the row shows Requires Basic+.
TellDone syncs your tasks with Todoist in both directions. Tasks you create or change in TellDone appear in Todoist. When you complete, reopen, or delete a task in Todoist, TellDone updates the task too.
Setup

- Go to Settings > Integrations
- Turn on the Todoist switch
- Sign in to Todoist in the window that opens and allow access
- TellDone takes you back to the app when you're done
If connecting fails, an error appears under the switch. Tap Try again.
New tasks go to your Todoist Inbox.
What syncs
- Task title and description
- Due dates
- Completion status
- Priority: TellDone High = Todoist Priority 1 (red), Medium = Priority 2 (orange), Low = Priority 3 (blue)
- Tags are mapped to Todoist labels
Changes sync both ways:
- Complete, reopen, or delete a task in TellDone, and Todoist is updated too
- Update a title, description, due date, priority, or tags in TellDone, and Todoist is updated too. Changes you make to these in Todoist stay in Todoist
- Complete, reopen, or delete a task in Todoist, and TellDone is updated too
Reminder times aren't sent to Todoist.
Changes from Todoist usually reach TellDone within seconds. A backup check runs every 5 minutes.
Disconnect
- Go to Settings > Integrations
- Turn off the Todoist switch
- Tap Disconnect to confirm. The dialog says: "Tasks will no longer be pushed to Todoist. Status sync will stop. Existing tasks in Todoist will not be deleted."
If you change plans
Your connection stays in place when you change plans. On Free, TellDone stops sending changes to Todoist, but tasks you complete, reopen or delete in Todoist still update TellDone. Full sync starts again on its own, with no reconnect, when you upgrade. On Basic, an integration you already had keeps syncing, but you can't connect more than one. You can disconnect on any plan.
See also
- Tasks - managing tasks in TellDone
- Microsoft To Do - another server integration for two-way task sync
- Notion - another server integration for notes, tasks, and events
- Apple Calendar and Reminders - local task sync
- Webhook automations - send data to your own services